Calculadoras

Calculadora de Custo de Combustível

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 Velocidade

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

Calculadora de Tempo de Condução

Estimate driving time including planned rest stops.

Calculadora de Deslocamento

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

Calculadora de Custo de Viagem de Carro

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

Calculadora de Custo de Carga de VE

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

Calculadora de Custo de Carga Tesla

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

Calculadora de Depreciação de Carro

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

Calculadora de Carona Compartilhada

See how much carpooling cuts your annual commute cost.

Calculadora de Tamanho de Sutiã

Calculate your bra size from band and bust measurements.

Calculadora de Cobertor de Peso

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

Calculadora de Tamanho de Toalha de Mesa

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

Calculadora de Saia Circular

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

Calculadora de Custo de Eletricidade

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

Calculadora de Cobertura de Tinta

Estimate how many gallons of paint your room needs.

Calculadora de Piso

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 Ar Condicionado

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

Calculadora de Gorjeta

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

Calculadora de Desconto

Find the sale price and savings for any percent off.

Salário para Valor por Hora

Convert an annual salary into an hourly rate.

Valor por Hora para Salário

Convert an hourly wage to monthly and annual income.

Calculadora de ROI

Compute return on investment and annualized return.

Calculadora de Margem de Lucro

Compute gross profit and margin from revenue and cost.

Calculadora de Taxa 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 Extras

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

Calculadora de Custo de Reunião

Calculate what a meeting truly costs in payroll dollars.

Calculadora de Idade

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

Dias até o Natal

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

Calculadora de Ciclo de Sono

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

Data Prevista do Parto

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

Calculadora de Dias Úteis

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

Cara ou Coroa

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

Lançador de Dados

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

Gerador de Números Aleatórios

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

Gerador de Sim ou Não

Let randomness decide. A fair coin flip with words.

Calculadora de Signo do Zodíaco

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

Calculadora de Compatibilidade Amorosa

Just-for-fun compatibility score from two names.

Calculadora de Custo de Chuveiro

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

Calculadora de Protetor Solar

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

Calculadora de Tempo de Leitura

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

Calculadora de Velocidade de Audiolivro

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 Calorias

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

Calculadora de Consumo de Água

Estimate your daily water target adjusted for activity and climate.

Passos para Milhas

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

Calculadora de Porcentagem

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

Calculadora de Pés Quadrados

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.

Binário para Decimal

Convert between binary and decimal in either direction.

Calculadora de Frações

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

Currency Converter

Quick approximate currency conversion using static reference rates.

Tradutor de Pig Latin

Translate any text into Pig Latin instantly.

Texto de Cabeça para Baixo

Flip your text upside down with Unicode tricks.

Contador de Palavras

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 Custo de Estacionamento

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

Calculadora de Custo de Troca de Óleo

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 Velocidade 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.

Pegada de Carbono de Viagem

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 Milhas por Ano

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 Distância

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 Tempo de Voo

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.

Conversão de Tamanho de Calçado

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

Conversor de Tamanho de Anel

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

Calculadora de Tamanho de Vestido

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

Calculadora de Tamanho de Jeans

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

Calculadora de Tamanho de Chapéu

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

Calculadora de Tamanho de Cinto

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

Calculadora de Tamanho de Jaqueta

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

Calculadora de Tamanho de Luvas

Find your glove size from hand circumference at the knuckles.

Calculadora de Tamanho de Meias

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

Calculadora de Tamanho de Camiseta

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

Calculadora de Tamanho de Calças

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

Conversor de Tamanhos de Roupas

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

Tamanho de Calçado dos EUA para Reino Unido

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

Tamanho de Calçado do Reino Unido para os EUA

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

Tamanho de Calçado Masculino para Feminino

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

Calculadora de Tamanho de Calçado Infantil

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

Calculadora de Lã

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

Conversor de Tamanho de Agulhas de Tricô

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

Calculadora de Acabamento de Colcha

Compute strips and yardage for quilt binding.

Calculadora de Triângulo Meio Quadrado

Cut size and square count for half-square triangles.

Calculadora de Painéis de Cortina

Compute panel width and required fabric for window curtains.

Calculadora de Comprimento de Elástico

Find elastic length for waistbands, cuffs, and necklines.

Calculadora de Linha de Costura

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

Calculadora de Comprimento de Cadarço

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

Calculadora de Meias Perdidas

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

Calculadora de Biquíni

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

Calculadora de Papel de Parede

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

Calculadora de Acessibilidade de Aluguel

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

Custo de Reforma da Casa

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

Calculadora de Custo de Mudança

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

Calculadora de Tamanho do Gramado

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

Calculadora de Custo 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.

Tamanho da Árvore de Natal

Find the right tree height and width for your room.

Tempo de Queima de Vela

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

Valor R de Isolamento

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 GPA

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

Calculadora de Notas

Compute your weighted course grade across up to 5 assignments.

Calculadora de Pontuação de Teste

Compute percentage and letter grade from correct answers.

Calculadora de Horas de Trabalho

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

Calculadora de Fatura

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

Calculadora de Ponto de Equilíbrio

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 Força da Senha

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

Conversor de Tamanho de Fonte

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 por Extenso

Spell out any number up to a trillion in English.

Gerador 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 Tempo de Estudo

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

Conversor de Fuso Horário

Convert a time between major world time zones.

Calculadora de Data de Aposentadoria

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

Dias até o Aniversário

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

Calculadora de Dias de Trabalho

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 Acordar

Find the best wake times after a chosen bedtime.

Temporizador de Contagem Regressiva

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

Calculadora de Há Quanto Tempo

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

Calculadora de Idade 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 Ano Bissexto

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

Calculadora de Duração de Tempo

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

Hora para Decimal

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

Calculadora de Audiolivros

Plan your audiobook reading pace and yearly book goals.

Duração de Série de TV

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

Calculadora de Maratona de Séries

Find your binge finish date based on daily watch time.

Calculadora de Suspensão de Rede

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

Calculadora de Balões de Hélio

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

Calculadora de Tamanho de Barraca

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

Calculadora de Numerologia

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

Gerador de Números da Sorte

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

Calculadora de Dias do Minecraft

Convert between real minutes and Minecraft in-game days.

Robux para USD

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

Calculadora de Probabilidades de Pôquer

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

Calculadora de Rating de Xadrez

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 Gordura 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 Corrida

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

Calorias Queimadas

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 Pés Cúbicos

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

Hex para 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 para GPA

Convert a letter grade or percentage into GPA points.

Calculadora de Desafio de Leitura

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

Quanto Tempo para Ler um Livro

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.

Contagem de Palavras do Livro

Typical word counts and page estimates by genre.

Calculadora de Meta do Goodreads

Are you on pace for your Goodreads reading challenge?

Contagem de Páginas do Kindle

Convert KOLL Kindle pages to print pages and words.

Calculadora de Banho vs Chuveiro

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

Calculadora de Crescimento Capilar

Months to grow your hair to a target length.

Calculadora de Produtos de Beleza

Annual cost of your beauty routine.

Calculadora de Pasta de Dente

Tubes per year and annual toothpaste cost.

Tempo de Lavagem das Mãos

WHO-recommended hand-washing time and song references.

Calculadora de Custo de Skincare

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

Durabilidade do Perfume

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

Custo de Tintura de Cabelo

Annual hair color cost by method and frequency.

Calculadora de Custo de Maquiagem

Annual cost of your makeup kit.

Calculadora de Uso de Sabonete

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

Calculadora de Máscaras

Masks needed per month and annual cost by type.

Quão Rico Eu Sou

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 Pontuação de QI

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 da Proibição de Redes Sociais

Estimate reach and revenue lost if your account is banned.

Alternativas ao Tempo no TikTok

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

Alternativas ao Tempo em Redes Sociais

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 Proporção

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 Pontuação ACT

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

Calculadora de GPA Universitário

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 Ano de Formatura

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 do Ensino Médio

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

Calculadora de Pontuação IELTS

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

Calculadora de Fator de Impacto

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

Calculadora de Pontuação PTE

Weighted overall PTE Academic score with CEFR equivalent.

Calculadora de Nota do Semestre

Weighted course grade across all assignments.

Calculadora de Nota de Teste

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

Calculadora de GPA Paquistão

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

Calculadora de Espaçamento de Sala de Aula

Maximum desks in a room given social-distancing spacing.

Calculadora de Proporção

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

Calculadora de Tamanho de Imagem

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

Calculadora de PPI

Pixels per inch from screen resolution and diagonal size.

Calculadora de Tamanho de Tela

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

Calculadora de Tamanho de TV

Recommended TV diagonal for your seating distance.

Calculadora de Altura de Montagem de TV

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

Calculadora de Tamanho de Vídeo

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

Calculadora de Exposição

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

Calculadora de Profundidade de Campo

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

Calculadora de Distância Focal

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

Calculadora de Fator de Corte

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

Calculadora de Escala de Resolução

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 Velocidade do Obturador

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

Calculadora de Campo de Visão

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

Calculadora de Distância Hiperfocal

The focus distance that maximizes depth of field.

Calculadora de Pixels para Tamanho de Impressão

Maximum print size for an image at a chosen DPI.

Calculadora de Projetor

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

Calculadora de Proporção de Imagem

Resize an image keeping its aspect ratio.

Calculadora de Razão de Contraste

Display contrast ratio from white and black luminance.

Calculadora de Ampliação de Lente

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

Calculadora de Foto sem Piscadas

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

Calculadora de Quadros para Timecode

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

Calculadora de Timecode para Quadros

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

Calculadora de Filme

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

Calculadora de Exagero Vertical

Vertical exaggeration factor for profiles and cross-sections.

Calculadora de Renderização 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 Frequência 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.

Localizador de Acordes

Identify a chord from a set of notes.

Calculadora de Inversão de Acordes

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

Gerador de Progressão de Acordes

Build a chord progression in any key.

Transpositor de Acordes

Transpose a chord progression to a new key.

Calculadora de Transposição Musical

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

Calculadora de Semitons

Count the semitones between two notes.

Calculadora de Armadura

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

Calculadora de Duração Musical

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

Calculadora de Delay e 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 Tensão de Cordas de Guitarra

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

Calculadora de Série Harmônica

First 16 harmonics of a fundamental frequency.

Calculadora de Extensão Vocal

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

Calculadora de Caixa de Som

Recommended enclosure volume for a driver.

Calculadora de Comprimento de Duto

Port length for a vented speaker enclosure.

Calculadora de Tamanho de Arquivo de Áudio

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

Calculadora de Vida da Bateria

Estimate device runtime from battery capacity and consumption.

Calculadora de Capacidade da Bateria

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

Calculadora de Tamanho da Bateria

Minimum battery capacity for a target runtime.

Calculadora de Tempo de Voo de Drone

Estimate drone flight time from battery and motor draw.

Calculadora de Motor de Drone

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

Calculadora de Ciclo de Trabalho

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

Calculadora de eDPI

Effective DPI for FPS mouse sensitivity comparison.

Calculadora de Entropia de Senha

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 Sub-rede 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 Largura de Banda

Required bandwidth to transfer a file in a target time.

Calculadora de Tempo de Upload

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

Calculadora de Tempo de Atividade

Allowed downtime for a given uptime percentage.

Calculadora de Transferência de Dados

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

Calculadora de Taxa de Baud

Effective data throughput of a serial connection.

Conversor de Endereço 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 Distância de Hamming

Count differing bits between two binary strings.

Calculadora de Bit de Paridade

Compute the parity bit for a binary data word.

Calculadora de Portas Lógicas

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

Calculadora de Ganho de Amp-Op

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

Calculadora de Largura de Trilha PCB

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

Calculadora de Resistência de Trilha PCB

Resistance and voltage drop of a PCB copper trace.

Calculadora de Corrente de Trilha PCB

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

Calculadora de Impedância PCB

Characteristic impedance of a microstrip PCB trace.

Calculadora de Impedância de Cabo

Characteristic impedance of a coaxial cable.

Calculadora de Atraso de Propagação

Signal travel delay through a trace or cable.

Calculadora LM317

Resistor value for a target LM317 regulator output voltage.

Calculadora de Latência RAM

True memory latency in nanoseconds from CL and frequency.

Calculadora de Casamento de Impedância

L-network component values to match two impedances.

Calculadora de Distorção Harmônica Total

THD from a fundamental and its harmonic amplitudes.

Conversor de Unidades RF

Convert RF power between dBm, watts, and dBW.

Calculadora de Cifra de Vigenère

Encrypt or decrypt text with the Vigenère cipher.

Conversor de Hex para Texto

Decode a hexadecimal string into readable text.

Calculadora de Ponto Flutuante

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

Calculadora GSD

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

Calculadora de Produto Largura de Banda × Atraso

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.

Gerador de Círculos do Minecraft

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

Calculadora de Pilhas do Minecraft

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

Calculadora de Portal do Nether

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

Localizador de Portal do End

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

Calculadora de Doces Pokémon GO

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

Calculadora de Blocos de Pirâmide

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

Calculadora de Decaimento de Rust

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

Calculadora de Chances 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 Classe de Frete

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

Calculadora de Paletes

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

Calculadora de Ponto de Reposição

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

Calculadora de Tempo Takt

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

Calculadora de Carregamento de Contêiner

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

Contagem Regressiva de Natal

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

Calculadora de Páscoa

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

Calculadora de Boneco de Neve

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

Calculadora de Apocalipse Vampírico

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

Calculadora de Invasão Zumbi

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

Calculadora de Doces ou Travessuras

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

Calculadora de Natal Branco

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

Conversor de Calendário Maia

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

Calculadora de Resoluções de Ano Novo

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

Calculadora de Sensação Térmica

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

Calculadora de Pluviosidade

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

Calculadora de Chuva para Neve

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

Calculadora de Banho 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 Azimute

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

Calculadora de Distância Latitude-Longitude

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

Calculadora de Taxa de Engajamento

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

Calculadora de Duração do Cilindro de Oxigênio

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 Disparidade Salarial de Gênero

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 Massa de Sal

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

Calculadora de Gorjeta de Pizza

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

Calculadora de Matched Betting

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

Calculadora de Dia da Semana

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

Calculadora de Duração do Recrutamento

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

Calculadora de Aquário

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

Calculadora de Espessura do Vidro do Aquário

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

Calculadora de Caixa de Areia

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

Cifra de César

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

Calculadora de Bandeira dos EUA

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

Calculadora de HP 5e

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

Calculadora de Encontros 5e

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

Calculadora de Compra de Pontos 5e

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

Calculadora de EV de Pôquer

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

Minúsculas para Maiúsculas

Convert any lowercase text to UPPERCASE instantly in your browser.

Conversor para Caixa Capital

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

Conversor para Caixa de Sentença

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

Gerador de Versaletes

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

Gerador de Texto Pequeno

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

Gerador de Texto Riscado

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

Gerador de Subscrito

Convert numbers and letters to Unicode subscript characters.

Gerador de Sobrescrito

Convert numbers and letters to Unicode superscript characters.

Gerador de Fonte Gótica

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

Gerador de Texto Espelho

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

Conversor de Números para Letras

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

Conversor de Letras para 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 Proporção 16:9

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

Calculadora de Proporção 16:10

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

Calculadora de Proporção 4:3

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

Calculadora de Proporção CSS

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

Calculadora de Proporção de Pixel

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

Calculadora de Proporção Retrato

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

Calculadora de Proporção de Tela

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

Dias até o Outono

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

Dias até o Dia dos Namorados

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

Contagem Regressiva para o Ano Novo

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

Calculadora de Peso em 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.

Conversão de mm para Quilates

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

Em Que Série Eu Estava

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