Calculadoras

Calculadora de Costo de Combustible

Estimate the gas cost of any trip from distance, fuel economy, and the price per gallon.

Calculadora de Gasolina

Figure out what it costs to top off your tank from its current level.

Calculadora de MPG

Compute real miles per gallon from your odometer and gallons pumped.

Calculadora de Velocidad

Calculate average speed from distance and time — supports hours and minutes.

Calculadora de Tiempo de Conducción

Estimate driving time including planned rest stops.

Calculadora de Trayecto

Add up gas, insurance, and parking for the full year of commuting.

Calculadora de Costo de Viaje por Carretera

Total a road trip budget: gas, hotels, and food, in one shot.

Calculadora de Costo de Carga de VE

See what charging your electric vehicle actually costs per month at home rates.

Calculadora de Costo de Carga Tesla

Estimate weekly and yearly home charging cost for your Tesla model.

Calculadora de Depreciación del Coche

Estimate your car's current value after years and mileage.

Calculadora de Coche Compartido

See how much carpooling cuts your annual commute cost.

Calculadora de Talla de Sujetador

Calculate your bra size from band and bust measurements.

Calculadora de Manta de Peso

Find your ideal weighted blanket weight using the 10% rule.

Calculadora de Tamaño de Mantel

Find the right tablecloth size for any table and desired drop length.

Calculadora de Falda Circular

Compute fabric size and waist radius for a full circle skirt.

Calculadora de Costo de Electricidad

Compute the monthly cost of running any appliance from wattage and use.

Calculadora de Cobertura de Pintura

Estimate how many gallons of paint your room needs.

Calculadora de Suelo

Compute square footage and material needed including waste factor.

Calculadora de Azulejos

Count tiles needed for any room with waste built in.

Calculadora de Hipoteca

Estimate monthly payments including principal, interest, taxes, and insurance.

Solar Panel Savings Calculator

Estimate annual savings and payback period for a residential solar install.

Calculadora de BTU de Aire Acondicionado

Find the BTU rating you need to properly cool a room.

Calculadora de Propinas

Compute the tip and per-person split for any bill.

Calculadora de Descuento

Find the sale price and savings for any percent off.

Salario a Pago por Hora

Convert an annual salary into an hourly rate.

Pago por Hora a Salario

Convert an hourly wage to monthly and annual income.

Calculadora de ROI

Compute return on investment and annualized return.

Calculadora de Margen de Beneficio

Compute gross profit and margin from revenue and cost.

Calculadora de Tarifa Freelance

Work out the hourly rate you need to charge to hit your income goal.

Calculadora Pomodoro

Plan focus blocks and breaks using the 25/5 pomodoro technique.

Calculadora de Horas Extra

Compute weekly pay with overtime at 1.5x past 40 hours.

Calculadora de Costo de Reunión

Calculate what a meeting truly costs in payroll dollars.

Calculadora de Edad

Calculate exact age in years, months, and days from any date of birth.

Días hasta Navidad

How many days, hours, and minutes are left until Christmas Day?

Calculadora de Ciclo de Sueño

Find optimal wake-up or bedtime based on 90-minute sleep cycles.

Fecha Probable de Parto

Estimate your due date and current pregnancy week from your last period.

Calculadora de Días Hábiles

Count working days (Mon–Fri) between any two dates.

Lanzar una Moneda

Flip a virtual coin — heads or tails, fair random.

Lanzador de Dados

Roll any combination of D4, D6, D8, D10, D12, D20, or D100.

Generador de Números Aleatorios

Generate random numbers in any range, with or without duplicates.

Generador de Sí o No

Let randomness decide. A fair coin flip with words.

Calculadora de Signo Zodiacal

Look up your Western astrological sign from your date of birth.

Calculadora de Compatibilidad Amorosa

Just-for-fun compatibility score from two names.

Calculadora del Costo de Ducha

Compute the yearly cost of your showers in water and energy.

Calculadora de Protector Solar

How much sunscreen you actually need per day at the beach.

Calculadora de Tiempo de Lectura

Estimate how long a book or article will take to read.

Calculadora de Velocidad de Audiolibro

See how much time you save listening at higher playback speeds.

Calculadora IMC

Body Mass Index from height and weight, with the standard category breakdown.

Calculadora de Calorías

Estimate daily calorie needs via Mifflin-St Jeor BMR and activity multiplier.

Calculadora de Consumo de Agua

Estimate your daily water target adjusted for activity and climate.

Pasos a Millas

Convert step counts to miles using your stride length or height estimate.

Calculadora de Porcentaje

Solve any percentage question: X% of Y, X is what % of Y, percent change.

Calculadora de Pies Cuadrados

Compute area for rectangles, circles, and triangles in square feet.

Conversor de Número Romano

Convert any number 1–3999 to a Roman numeral and back.

Binario a Decimal

Convert between binary and decimal in either direction.

Calculadora de Fracciones

Add, subtract, multiply, or divide two fractions with auto-simplification.

Currency Converter

Quick approximate currency conversion using static reference rates.

Traductor de Pig Latin

Translate any text into Pig Latin instantly.

Texto al Revés

Flip your text upside down with Unicode tricks.

Contador de Palabras

Count words, characters, and reading time for any text.

Horsepower Calculator

Compute horsepower from engine torque and RPM using the standard SAE formula.

Tire Size Calculator

Decode a tire size into overall diameter, sidewall height, and circumference.

Compression Ratio Calculator

Engine static compression ratio from bore, stroke, deck, gasket, and chamber volumes.

Rpm Calculator

Compute engine RPM at a given speed from tire size, gear, and final drive.

0 60 Calculator

Estimate 0-60 mph time from horsepower, weight, and drivetrain.

Wheel Horsepower Calculator

Estimate WHP at the wheels after drivetrain losses.

Turbo Size Calculator

Estimate compressor airflow target for a turbo build.

Boost Horsepower Calculator

Estimate boosted HP from a naturally-aspirated baseline and boost pressure.

Bsfc Calculator

Compute brake-specific fuel consumption from fuel flow and brake horsepower.

Wheel Offset Calculator

Compute wheel offset in mm from width and backspacing.

Speedometer Gear Calculator

Estimate the right driven-gear tooth count for accurate speedometer reading.

Boat Speed Calculator

Estimate top boat speed from HP and weight using Crouch's planing formula.

Nautical Mile Calculator

Convert between nautical miles, statute miles, and kilometers.

Crosswind Calculator

Resolve runway wind into headwind and crosswind components.

Flight Radiation Calculator

Estimate cosmic-ray radiation dose for a flight.

Gvwr Calculator

Total your truck's loaded weight and see which GVWR class it falls into.

Fuel Pump Calculator

Estimate fuel flow demand and per-injector load for a given HP target.

Traffic Density Calculator

Compute traffic density (vehicles per mile) from flow rate and speed.

Winch Size Calculator

Find the minimum winch capacity for your vehicle and terrain.

Calculadora de Costo de Estacionamiento

Compare pay-as-you-go parking against a monthly pass.

Calculadora de Costo de Cambio de Aceite

Compare DIY vs shop oil changes over a year of driving.

Car Insurance Estimator

Rough estimate of annual auto insurance premiums by age, vehicle, and coverage.

Calculadora de Velocidad de Bicicleta

Compute road-bike speed from cadence, gearing, and wheel size.

Train Vs Drive Calculator

Compare driving cost against a train ticket, including the value of your time.

Huella de Carbono de Viaje

Estimate CO₂ emissions for any trip by mode and distance.

Uber Vs Car Calculator

Compare monthly rideshare spend against the full cost of car ownership.

Miles To Dollars Calculator

Estimate the cash value of your airline miles by program and redemption.

Calculadora de Millas por Año

Total annual driving miles from commuting, leisure, and road trips.

Engine Hours To Miles

Convert engine hours (on a marine or industrial engine) to equivalent automotive miles.

Calculadora de Distancia

Solve any of distance, speed, or time given the other two.

Toll Cost Calculator

Add up weekly, monthly, and annual toll spend — and the E-ZPass discount.

Calculadora de Tiempo de Vuelo

Estimate flight time from distance, cruise speed, and layover length.

Ticket Optimizer

Should you buy event tickets now or wait? A simple heuristic by time-to-event and category.

Conversión de Talla de Calzado

Convert between US Men, US Women, UK, EU, and CM shoe sizes.

Conversor de Talla de Anillo

Convert between US, UK, EU, and inner diameter / circumference ring sizes.

Calculadora de Talla de Vestido

Find your US, UK, and EU dress size from bust, waist, and hip measurements.

Calculadora de Talla de Vaqueros

Get your W × L jeans size from waist and inseam measurements.

Calculadora de Talla de Sombrero

Find your hat size in numeric, fitted, and S/M/L formats from head circumference.

Calculadora de Talla de Cinturón

Find the belt size to order from your pants waist or measured waist.

Calculadora de Talla de Chaqueta

Find your jacket size and length from chest, height, and weight.

Calculadora de Talla de Guantes

Find your glove size from hand circumference at the knuckles.

Calculadora de Talla de Calcetines

Convert shoe size to sock size (S/M/L/XL).

Calculadora de Talla de Camiseta

Get your t-shirt size from chest and waist measurements.

Calculadora de Talla de Pantalones

Get your W × L pants size and a hip-to-waist ratio flag.

Conversor de Tallas de Ropa

Convert women's top sizes across US, UK, EU, AU, IT, FR, and JP.

Talla de Calzado de EE.UU. a Reino Unido

Convert US shoe sizes to UK in either men's or women's sizing.

Talla de Calzado de Reino Unido a EE.UU.

Convert UK shoe sizes to US in either men's or women's sizing.

Talla de Calzado de Hombre a Mujer

Convert between men's and women's US shoe sizes (1.5-size offset).

Calculadora de Talla de Calzado Infantil

Convert measured foot length to US toddler/youth shoe size.

Calculadora de Lana

How many skeins you need for a project, with a 10% safety buffer.

Conversor de Tamaño de Agujas de Tejer

Convert knitting needle sizes between US, metric (mm), and old UK numbering.

Calculadora de Ribete de Edredón

Compute strips and yardage for quilt binding.

Calculadora de Triángulo Medio Cuadrado

Cut size and square count for half-square triangles.

Calculadora de Paneles de Cortina

Compute panel width and required fabric for window curtains.

Calculadora de Longitud de Elástico

Find elastic length for waistbands, cuffs, and necklines.

Calculadora de Hilo de Coser

Estimate thread consumed by a seam from length and stitch type.

Calculadora de Longitud de Cordones

Find the right shoelace length for your shoe and lacing style.

Calculadora de Calcetines Perdidos

Estimate how many socks you've lost to the laundry over the years.

Calculadora de Bikini

Get top and bottom bikini sizes from bra size and hip measurement.

Calculadora de Papel Pintado

Calculate rolls of wallpaper needed for a room, with waste and pattern repeat.

Calculadora de Asequibilidad de Alquiler

Check if your target rent fits the 30% rule and standard DTI limits.

Costo de Renovación del Hogar

Get a price range for kitchen, bath, basement, and other renovations.

Calculadora de Costo de Mudanza

Estimate the cost of a local, long-distance, or interstate move.

Calculadora de Tamaño del Césped

Compute lawn area in square feet and acres, plus seed and mowing estimates.

Calculadora de Costo de Cerca

Estimate fence cost by perimeter, material, height, and gate count.

Storage Unit Size

Pick the right storage unit size for your home and items.

Tamaño del Árbol de Navidad

Find the right tree height and width for your room.

Tiempo de Combustión de Vela

Estimate how many hours a candle will burn from size, wick count, and wax type.

Valor R de Aislamiento

Find recommended R-value and additional insulation needed by climate zone.

Dumpster Size Calculator

Find the right roll-off dumpster size for your project.

Internet Speed Cost

See $-per-Mbps and whether your plan suits your usage.

Water Bill Calculator

Estimate monthly water usage and cost from household activity.

Calculadora de GPA

Calculate your weighted GPA across up to 6 courses, with letter grades and credit hours.

Calculadora de Calificaciones

Compute your weighted course grade across up to 5 assignments.

Calculadora de Puntuación de Examen

Compute percentage and letter grade from correct answers.

Calculadora de Horas de Trabajo

Daily, weekly, and monthly hours from start time, end time, and breaks.

Calculadora de Facturas

Subtotal, discount, tax, and total for up to 5 line items.

Calculadora de Punto de Equilibrio

Units and revenue needed to cover fixed and variable costs.

Contador de Caracteres

Characters, words, Twitter remaining, and SMS segments for any text.

Verificador de Fortaleza de Contraseña

Score a password's strength locally based on length, variety, and patterns.

Conversor de Tamaño de Fuente

Convert between px, pt, em, rem, vw, and percent at a chosen base.

Sat Score Calculator

Approximate scaled SAT scores from raw section scores.

Números a Palabras

Spell out any number up to a trillion in English.

Generador de Texto Invertido

Reverse a string character-by-character or word order.

Nato Phonetic Alphabet

Spell any word using the NATO phonetic alphabet.

Calculadora de Tiempo de Estudio

Plan study hours per subject given an exam date and difficulty.

Conversor de Zona Horaria

Convert a time between major world time zones.

Calculadora de Fecha de Jubilación

Find your retirement date and time remaining based on age and country.

Días hasta el Cumpleaños

Count down to your next birthday from today's date.

Calculadora de Días Laborables

Count working days between two dates, excluding US federal holidays.

Calculadora de Hora de Dormir

Find the best bedtimes to wake refreshed at a target time.

Calculadora de Hora de Despertar

Find the best wake times after a chosen bedtime.

Temporizador de Cuenta Regresiva

Count down the days, hours, and minutes to any future date.

Calculadora de Cuánto Tiempo Hace

Count years, months, days, weeks, and hours since a past date.

Calculadora de Edad Coreana

Convert international age to traditional Korean age.

Calculadora de Fase Lunar

Find the moon phase, illumination, and next full moon for any date.

Palindrome Date Finder

Find all palindrome dates in a given year.

Calculadora de Año Bisiesto

Check whether a year is a leap year, plus the next and last leap year.

Calculadora de Duración de Tiempo

Difference between two times in hours, minutes, and seconds.

Hora a Decimal

Convert HH:MM to a decimal hour value and back.

Calculadora de Audiolibros

Plan your audiobook reading pace and yearly book goals.

Duración de Serie de TV

Total runtime of a series across seasons, episodes, and lengths.

Calculadora de Maratón de Series

Find your binge finish date based on daily watch time.

Calculadora de Colgado de Hamaca

Hang point height, tree spacing, and strap length for a comfy hammock.

Calculadora de Globos de Helio

How many balloons does it take to lift a given weight?

Calculadora de Tamaño de Tienda de Campaña

Find the right tent capacity for your campers, gear, and style.

Calculadora de Numerología

Compute Life Path and Name numbers from your DOB and full name.

Generador de Números de la Suerte

Generate lottery-style numbers seeded by your name and today's date.

Calculadora de Días de Minecraft

Convert between real minutes and Minecraft in-game days.

Robux a USD

Convert Robux to dollars (and back) at both direct buy and DevEx rates.

Calculadora de Probabilidades de Póker

Rough heads-up and multi-way win probability by hole-card category.

Calculadora de Ranking de Ajedrez

Compute your new Elo after a single game vs an opponent.

Calculadora de Proteína

Daily protein target by body weight, activity level, and goal.

Calculadora de Macros

Daily calories, protein, fat, and carb targets from your body and goal.

Calculadora de Grasa Corporal

Estimate body fat percentage with the US Navy method.

Calculadora de Peso Ideal

Compare your weight to Devine, Robinson, Miller, Hamwi, and healthy-BMI ranges.

Calculadora de Ritmo de Carrera

Find pace, time, or distance from any two of the three.

Calorías Quemadas

Calories burned for any activity using MET values.

Diaper Calculator

Estimate diapers needed and cost by baby's age and brand.

Cost Of Having Baby

Total estimated cost of delivery plus the first five years.

Expiration Date Calculator

Estimate expected expiration date by item type.

Battery Charge Time

Estimate hours to charge a battery from current to target level.

Linear Inches Calculator

Total linear inches and airline carry-on / checked classification.

Headphone Power

How much amp power your headphones need to hit a target SPL.

Well Volume Calculator

Compute gallons of water in a well from diameter and depth.

Garbage Bag Size

Find the right gallon-rated bag size for your trash can.

Picture Frame Calculator

Compute mat, frame, and overall sizes for any artwork.

Calculadora de Pies Cúbicos

Compute volume in cubic feet, yards, meters, and liters.

Hex a Decimal

Convert between hexadecimal and decimal, with binary preview.

Calculadora Científica

Evaluate math expressions with sin/cos/tan, log, sqrt, pi, e, and more.

Nota a GPA

Convert a letter grade or percentage into GPA points.

Calculadora de Reto de Lectura

Track progress on a yearly reading goal and project your finish date.

Cuánto Tarda en Leer un Libro

Estimate hours to read a book at your pace.

Páginas por Hora

Measure your actual reading speed in pages per hour and words per minute.

Conteo de Palabras de Libro

Typical word counts and page estimates by genre.

Calculadora de Meta de Goodreads

Are you on pace for your Goodreads reading challenge?

Conteo de Páginas de Kindle

Convert KOLL Kindle pages to print pages and words.

Calculadora de Baño vs Ducha

Find out whether baths or showers are cheaper for you over a year.

Calculadora de Crecimiento de Cabello

Months to grow your hair to a target length.

Calculadora de Productos de Belleza

Annual cost of your beauty routine.

Calculadora de Pasta de Dientes

Tubes per year and annual toothpaste cost.

Tiempo de Lavado de Manos

WHO-recommended hand-washing time and song references.

Calculadora del Costo del Cuidado de la Piel

Roll up the per-day and per-year cost of your skincare routine.

Duración del Perfume

How many weeks a perfume bottle will last at your usage.

Costo de Tinte de Cabello

Annual hair color cost by method and frequency.

Calculadora de Costo de Maquillaje

Annual cost of your makeup kit.

Calculadora de Uso de Jabón

How long a bar of soap lasts and the monthly cost.

Calculadora de Mascarillas

Masks needed per month and annual cost by type.

¿Qué Tan Rico Soy?

Where your income ranks against US (and rough global) distributions.

Net Worth Calculator

Compute net worth from assets minus liabilities; compare to age peers.

Calculadora de Puntuación de CI

Rough IQ estimate from a raw test score — strictly informal.

Calculadora de Fantasy Football

Score a player line in standard, PPR, or half-PPR scoring.

Impacto de la Prohibición de Redes Sociales

Estimate reach and revenue lost if your account is banned.

Alternativas al Tiempo en TikTok

What you could do instead of scrolling TikTok for X minutes a day.

Alternativas al Tiempo en Redes Sociales

Yearly hours sunk into social media — and what they could become.

Pixels To Inches

Convert between pixels and physical inches at any PPI.

Pounds And Ounces

Combine pounds and ounces into total weight in oz, grams, kg, and decimal lbs.

Feet And Inches Calculator

Convert, add, or subtract feet-and-inches values.

Height In Inches

Convert feet+inches height to inches, cm, and meters with a percentile note.

Acreage Calculator

Compute area in acres from any shape's dimensions.

Land Area Calculator

Land area in acres, hectares, bigha, katha, gaj, cent, and marla.

Lot Size To Acres

Convert lot size in square feet (or L×W) to acres and other units.

Lot Size To Sq Feet

Convert acres or other area units to square feet and find the side of a square lot.

Scale Calculator

Solve scaled, real, or ratio given the other two.

Download Time Calculator

How long a file will take to download at a given connection speed.

Torque To Hp

Compute horsepower from torque and RPM (or torque from HP and RPM).

Watts To Amps

Compute amperage from wattage at a chosen voltage.

Amps To Watts

Compute wattage from amperage at a chosen voltage.

Kwh To Kw

Convert between energy (kWh) and average power (kW) over a time period.

Dbm To Watts

Logarithmic conversion between dBm and watts.

Rms To Watts

Compute RMS and peak power from RMS voltage and impedance.

Joules To Volts

Convert energy and charge (or capacitance) into voltage.

Barometric Pressure

Pressure converted across all weather units with a forecast hint.

Ppm Calculator

Parts-per-million across PPM, PPB, ppt, percent, and mg/L.

Hardness Conversion

Convert between Rockwell C, Rockwell B, Brinell, Vickers, and Shore D.

Calculadora de Proporción

Simplify, scale, percentage-ize, or split a ratio.

Imperial To Metric

One-stop imperial→metric conversion across length, weight, volume, temperature, speed.

Metric To Imperial

Convert metric to imperial across length, weight, volume, temperature, and speed.

Dimensional Analysis

Educational unit-conversion chain across length, weight, volume, speed, temperature.

Calculadora de Puntuación ACT

Convert ACT raw section scores to scaled 1–36 scores and a composite.

Calculadora de GPA Universitario

Compute term and cumulative GPA on the 4.0 scale.

Calculadora de Nota Final

Find the score you need on the final exam to reach your target grade.

Calculadora de Curva de Notas

Apply square-root, flat-point, or scale-to-100 curves to a test score.

Calculadora de Año de Graduación

Find your high-school and college graduation years.

Calculadora de GWA

Compute General Weighted Average on the Philippine 1.0–5.0 scale.

Calculadora de GPA de Secundaria

Weighted and unweighted GPA with honors/AP/IB course bonuses.

Calculadora de Puntuación IELTS

Convert IELTS raw scores to band scores and an overall band.

Calculadora de Factor de Impacto

Compute a journal's impact factor from citations and article count.

Calculadora de Puntuación PTE

Weighted overall PTE Academic score with CEFR equivalent.

Calculadora de Nota Semestral

Weighted course grade across all assignments.

Calculadora de Nota de Examen

Percentage and letter grade from correct answers, with optional penalties.

Calculadora de GPA Pakistán

CGPA on the Pakistani HEC 4.0 scale from marks and credit hours.

Calculadora de Espaciado de Aula

Maximum desks in a room given social-distancing spacing.

Calculadora de Relación de Aspecto

Find an aspect ratio from dimensions, or solve a missing dimension.

Calculadora de Tamaño de Imagen

Estimate image file size by dimensions, bit depth, and format.

Calculadora de PPI

Pixels per inch from screen resolution and diagonal size.

Calculadora de Tamaño de Pantalla

Width, height, and area from a diagonal and aspect ratio.

Calculadora de Tamaño de TV

Recommended TV diagonal for your seating distance.

Calculadora de Altura de Montaje de TV

Ideal wall height to mount a TV for eye-level viewing.

Calculadora de Tamaño de Video

Estimate video file size from duration, resolution, and codec.

Calculadora de Exposición

Compute exposure value from aperture, shutter speed, and ISO.

Calculadora de Profundidad de Campo

Near, far, and total depth of field for any lens setup.

Calculadora de Distancia Focal

Focal length from sensor size and field of view, plus 35mm equivalent.

Calculadora de Factor de Recorte

Crop factor and 35mm-equivalent focal lengths from sensor dimensions.

Calculadora de Escala de Resolución

Scale a resolution by a factor and see the pixel-count change.

Calculadora de Time-lapse

Photos, video length, and storage for a time-lapse shoot.

Calculadora de Velocidad de Obturación

Recommended shutter speed for handheld, motion, or astro shots.

Calculadora de Campo de Visión

Horizontal, vertical, and diagonal angle of view for a lens.

Calculadora de Distancia Hiperfocal

The focus distance that maximizes depth of field.

Calculadora de Píxeles a Tamaño de Impresión

Maximum print size for an image at a chosen DPI.

Calculadora de Proyector

Throw distance or screen size from a projector's throw ratio.

Calculadora de Proporción de Imagen

Resize an image keeping its aspect ratio.

Calculadora de Relación de Contraste

Display contrast ratio from white and black luminance.

Calculadora de Aumento de Lente

Magnification and reproduction ratio for a lens at a subject distance.

Calculadora de Foto sin Parpadeos

How many shots you need for a blink-free group photo.

Calculadora de Fotogramas a Código de Tiempo

Convert a frame number to HH:MM:SS:FF timecode.

Calculadora de Código de Tiempo a Fotogramas

Convert HH:MM:SS:FF timecode to a total frame count.

Calculadora de Película

Rolls, frames, and cost for an analog film shoot.

Calculadora de Exageración Vertical

Vertical exaggeration factor for profiles and cross-sections.

Calculadora de Renderizado 3D

Total render time and completion date for a 3D project.

Calculadora de Bitrate de Streaming

Recommended streaming bitrate and required upload speed.

Calculadora de BPM

Calculate tempo (BPM) from a beat count and duration.

Calculadora de Frecuencia de Notas

Frequency of any musical note in equal temperament.

Calculadora de Intervalo Musical

Name the interval between two notes and its frequency ratio.

Calculadora de Escala Musical

Generate the notes of any scale from a root note.

Calculadora de Acordes

Notes and intervals for any chord from a root note.

Buscador de Acordes

Identify a chord from a set of notes.

Calculadora de Inversión de Acordes

Reorder a chord's notes into root, 1st, 2nd, or 3rd inversion.

Generador de Progresión de Acordes

Build a chord progression in any key.

Transpositor de Acordes

Transpose a chord progression to a new key.

Calculadora de Transposición Musical

Transpose a note up or down by a number of semitones.

Calculadora de Semitonos

Count the semitones between two notes.

Calculadora de Armadura de Clave

Sharps, flats, and relatives for any major or minor key.

Calculadora de Duración Musical

Total playing time from BPM, time signature, and bar count.

Calculadora de Delay y Reverb

Note-synced delay times in milliseconds for a given tempo.

Calculadora de Trastes

Distance of each fret from the nut for a given scale length.

Calculadora de Tensión de Cuerdas de Guitarra

Approximate string tension from gauge, scale length, and pitch.

Calculadora de Serie Armónica

First 16 harmonics of a fundamental frequency.

Calculadora de Rango Vocal

Classify a voice type from the lowest and highest comfortable notes.

Calculadora de Caja de Altavoz

Recommended enclosure volume for a driver.

Calculadora de Longitud de Puerto

Port length for a vented speaker enclosure.

Calculadora de Tamaño de Archivo de Audio

Estimate audio file size by sample rate, bit depth, and channels.

Calculadora de Vida de Batería

Estimate device runtime from battery capacity and consumption.

Calculadora de Capacidad de Batería

Convert between Ah, Wh, and joules for a battery.

Calculadora de Tamaño de Batería

Minimum battery capacity for a target runtime.

Calculadora de Tiempo de Vuelo de Dron

Estimate drone flight time from battery and motor draw.

Calculadora de Motor de Dron

Thrust per motor and thrust-to-weight ratio for a multirotor.

Calculadora de Ciclo de Trabajo

Duty cycle, frequency, and average voltage of a PWM signal.

Calculadora de eDPI

Effective DPI for FPS mouse sensitivity comparison.

Calculadora de Entropía de Contraseña

Estimate password strength in bits of entropy and crack time.

Calculadora RAID

Usable storage and fault tolerance for a RAID array.

Calculadora chmod

Convert Unix file permissions to octal and symbolic notation.

Calculadora de Subred IP

Network, broadcast, host range, and host count for an IPv4 subnet.

Calculadora CIDR

Parse CIDR notation into network, range, and host count.

Calculadora de Ancho de Banda

Required bandwidth to transfer a file in a target time.

Calculadora de Tiempo de Subida

How long a file takes to upload at a given speed.

Calculadora de Tiempo de Actividad

Allowed downtime for a given uptime percentage.

Calculadora de Transferencia de Datos

Transfer time across USB, Ethernet, Wi-Fi, 5G, and fiber.

Calculadora de Velocidad en Baudios

Effective data throughput of a serial connection.

Conversor de Dirección IP

Convert an IPv4 address between dotted-decimal, integer, and hex.

Codificador Base64

Encode text to Base64 or decode Base64 back to text.

Conversor ASCII

Convert text to ASCII codes and back.

Calculadora de Código Hamming

Add Hamming parity bits to a binary data word.

Calculadora de Distancia de Hamming

Count differing bits between two binary strings.

Calculadora de Bit de Paridad

Compute the parity bit for a binary data word.

Calculadora de Compuertas Lógicas

Evaluate any 2-input logic gate and show its truth table.

Calculadora de Ganancia de Amp Op

Voltage gain of inverting and non-inverting op-amp circuits.

Calculadora de Ancho de Pista PCB

Minimum trace width for a current using the IPC-2221 standard.

Calculadora de Resistencia de Pista PCB

Resistance and voltage drop of a PCB copper trace.

Calculadora de Corriente de Pista PCB

Maximum current a PCB trace can carry (IPC-2221).

Calculadora de Impedancia PCB

Characteristic impedance of a microstrip PCB trace.

Calculadora de Impedancia de Cable

Characteristic impedance of a coaxial cable.

Calculadora de Retardo de Propagación

Signal travel delay through a trace or cable.

Calculadora LM317

Resistor value for a target LM317 regulator output voltage.

Calculadora de Latencia RAM

True memory latency in nanoseconds from CL and frequency.

Calculadora de Adaptación de Impedancia

L-network component values to match two impedances.

Calculadora de Distorsión Armónica Total

THD from a fundamental and its harmonic amplitudes.

Conversor de Unidades RF

Convert RF power between dBm, watts, and dBW.

Calculadora del Cifrado Vigenère

Encrypt or decrypt text with the Vigenère cipher.

Conversor de Hex a Texto

Decode a hexadecimal string into readable text.

Calculadora de Coma Flotante

Show the IEEE 754 single-precision representation of a number.

Calculadora GSD

GSD for aerial/drone mapping from sensor, lens, and altitude.

Calculadora del Producto Ancho de Banda × Retardo

Data in flight on a network path — the ideal TCP window size.

Calculadora KD

Compute your kill/death ratio and KDA from kills, deaths, and assists.

Generador de Círculos de Minecraft

Generate the block count and shape data for a Minecraft circle of any diameter.

Calculadora de Pilas de Minecraft

Work out full stacks, leftovers, and chest space for any pile of Minecraft items.

Calculadora de Portal del Nether

Convert Overworld coordinates to the Nether and back at Minecraft's 1:8 ratio.

Buscador de Portal del End

Estimate how far a Minecraft stronghold sits from the world origin by its ring.

Calculadora de Caramelos de Pokemon GO

Find how much candy you need to evolve a Pokémon and how far you must walk for it.

Calculadora de Bloques de Pirámide

Count the blocks needed to build a solid, hollow, or stepped pyramid.

Calculadora de Decaimiento de Rust

Estimate how much health a Rust structure loses to decay while you are offline.

Calculadora de Probabilidades de Impostor

Work out your chance of being the impostor in a social-deduction party game.

Calculadora CBM

Calculate cubic metres (CBM) of a shipment from carton dimensions and quantity.

Calculadora de Peso Dimensional

Find the billable weight of a parcel by comparing actual weight to dimensional weight.

Calculadora DPMO

Calculate Defects Per Million Opportunities and the matching Six Sigma level.

Calculadora de Clase de Flete

Determine NMFC freight class from a shipment's weight and dimensions by density.

Calculadora de Palets

Work out how many boxes fit on a pallet, with layers and total stack weight.

Calculadora de Punto de Reorden

Calculate the inventory reorder point from demand, lead time, and safety stock.

Calculadora de Tiempo Takt

Calculate takt time — the production pace needed to meet customer demand.

Calculadora de Carga de Contenedor

Estimate how many shipping containers a cargo load needs by volume and weight.

Cuenta Regresiva para Navidad

See exactly how many days, weeks, and shopping days are left until Christmas.

Calculadora de Pascua

Find the date of Easter Sunday for any year using the Gregorian algorithm.

Calculadora de Muñeco de Nieve

Size the three balls of a snowman and estimate how much snow you need.

Calculadora de Apocalipsis Vampírico

Model how fast vampires could convert the human population through exponential growth.

Calculadora de Invasión Zombi

Estimate how fast a zombie outbreak spreads using a simplified infection model.

Calculadora de Truco o Trato

Estimate the candy haul and walking distance from a night of trick-or-treating.

Calculadora de Navidad Blanca

See the historical probability of snow on the ground on Christmas Day by city.

Conversor de Calendario Maya

Convert any Gregorian date to the Maya Long Count, Tzolkin, and Haab calendars.

Calculadora de Propósitos de Año Nuevo

Plan a resolution: see days left in the year and total hours you can commit.

Calculadora de Sensación Térmica

Calculate the NWS wind chill temperature and frostbite risk from temp and wind speed.

Calculadora de Precipitaciones

Calculate the volume of water collected from rainfall over a given area.

Calculadora de Lluvia a Nieve

Convert rainfall to expected snowfall using temperature-based snow ratios.

Calculadora de Baños de Sol

Estimate safe sun exposure time from skin type, UV index, and sunscreen SPF.

Calculadora de Terremotos

Calculate the energy released by an earthquake and its intensity at a distance.

Calculadora de Antípodas

Find the exact point on the opposite side of the Earth from any coordinates.

Calculadora de Acimut

Calculate the compass bearing (azimuth) from one coordinate to another.

Calculadora de Distancia por Latitud y Longitud

Calculate the great-circle distance between two coordinates with the Haversine formula.

Calculadora de Tasa de Interacción

Calculate social media engagement rate from followers, likes, comments, and shares.

Calculadora de Duración de Tanque de Oxígeno

Estimate how long a medical oxygen cylinder lasts at a given flow rate.

Calculadora de Peso de Diamante

Estimate the carat weight of a diamond from its shape and millimetre measurements.

Calculadora de Brecha Salarial de Género

Calculate the pay gap between two salaries as a percentage and dollar difference.

Calculadora PERT

Calculate a PERT three-point estimate with standard deviation and variance.

Calculadora NaNoWriMo

Track your novel-writing pace and find the daily word count needed to hit your goal.

Calculadora de Masa de Sal

Scale a salt dough recipe up or down for any number of batches.

Calculadora de Propina de Pizza

Split a pizza order with tip across friends and see the per-person cost.

Calculadora de Apuestas Combinadas

Calculate the lay stake, liability, and locked-in profit for a matched bet.

Calculadora de Día de la Semana

Find the day of the week for any date, plus day number and week of the year.

Calculadora de Duración del Proceso de Selección

Estimate total time-to-hire by adding up each stage of your recruitment process.

Calculadora de Acuario

Calculate aquarium volume, full weight, and fish capacity from tank dimensions.

Calculadora del Grosor del Vidrio del Acuario

Estimate the minimum glass thickness needed for an aquarium of a given size.

Calculadora de Caja de Arena

Calculate how much sand a sandbox needs and the number of bags to buy.

Cifrado César

Encrypt or decrypt text with a Caesar cipher and see all 25 brute-force shifts.

Calculadora de Bandera de EE.UU.

Calculate every dimension of a US flag from its hoist height per Executive Order 10834.

Calculadora de PV 5e

Calculate a D&D 5e character's hit points by class, level, and Constitution modifier.

Calculadora de Encuentros 5e

Rate a D&D 5e combat encounter as easy, medium, hard, or deadly by XP thresholds.

Calculadora de Compra de Puntos 5e

Track the 27-point budget for D&D 5e ability scores and see the modifiers.

Calculadora de EV de Póker

Calculate the expected value of a poker call from pot size, bet, and your equity.

Minúsculas a Mayúsculas

Convert any lowercase text to UPPERCASE instantly in your browser.

Conversor a Mayúsculas Iniciales

Capitalize the first letter of every word, including short words and articles.

Conversor a Tipo Oración

Capitalize the first letter of each sentence and lowercase the rest.

Generador de Versalitas

Convert text to ꜱᴍᴀʟʟ ᴄᴀᴘs using Unicode small-capital letters.

Generador de Texto Pequeño

Convert text to ˢᵐᵃˡˡ superscript-style letters for bios and captions.

Generador de Texto Tachado

Add a Unicode strikethrough line through any text you can copy anywhere.

Generador de Subíndice

Convert numbers and letters to Unicode subscript characters.

Generador de Superíndice

Convert numbers and letters to Unicode superscript characters.

Generador de Fuente Gótica

Convert text to 𝔤𝔬𝔱𝔥𝔦𝔠 Fraktur letters you can copy and paste.

Generador de Texto Espejo

Reverse text and create a mirrored backwards version you can copy.

Conversor de Números a Letras

Decode a number sequence into letters using A=1, B=2 … Z=26.

Conversor de Letras a Números

Encode letters into numbers using A=1, B=2 … Z=26.

Identificador de Hash

Identify a hash type from its length and character set — MD5, SHA, bcrypt and more.

Calculadora de Relación de Aspecto 16:9

Calculate the 16:9 height for any width — the standard widescreen video ratio.

Calculadora de Relación de Aspecto 16:10

Calculate the 16:10 height for any width — common on laptop and monitor screens.

Calculadora de Relación de Aspecto 4:3

Calculate the 4:3 height for any width — the classic fullscreen TV ratio.

Calculadora de Relación de Aspecto CSS

Generate the CSS aspect-ratio property and padding-top percentage for any ratio.

Calculadora de Relación de Aspecto de Píxel

Calculate the pixel aspect ratio (PAR) from display and pixel dimensions.

Calculadora de Relación de Aspecto Vertical

Calculate portrait-orientation heights at common ratios like 2:3, 3:4, and 9:16.

Calculadora de Relación de Pantalla

Find the simplified aspect ratio of any screen from its width and height.

Días hasta el Otoño

Count down the days until the first day of autumn (September 22).

Días hasta San Valentín

Count down the days remaining until Valentine's Day on February 14.

Cuenta Regresiva para Año Nuevo

Count down the days, hours, and minutes until New Year's Day.

Calculadora de Peso en Quilates

Convert gemstone weight in grams to carats and points.

Calculadora de Quilates de Diamante

Convert diamond weight to carats and estimate carat weight from a round diamond's diameter.

Conversión de mm a Quilates

Estimate a gemstone's carat weight from its millimetre diameter by shape.

En Qué Grado Estaba

Find which US school grade you were in during any given year.