Kalkulatory

Kalkulator Kosztu Paliwa

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

Kalkulator Paliwa

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

Kalkulator MPG

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

Kalkulator Prędkości

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

Kalkulator Czasu Jazdy

Estimate driving time including planned rest stops.

Kalkulator Dojazdu

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

Kalkulator Kosztu Podróży Samochodem

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

Kalkulator Kosztu Ładowania EV

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

Kalkulator Kosztu Ładowania Tesla

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

Kalkulator Amortyzacji Samochodu

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

Kalkulator Wspólnych Dojazdów

See how much carpooling cuts your annual commute cost.

Kalkulator Rozmiaru Biustonosza

Calculate your bra size from band and bust measurements.

Kalkulator Kołdry Obciążeniowej

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

Kalkulator Rozmiaru Obrusu

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

Kalkulator Spódnicy Koła

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

Kalkulator Kosztu Energii

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

Kalkulator Wydajności Farby

Estimate how many gallons of paint your room needs.

Kalkulator Podłogi

Compute square footage and material needed including waste factor.

Kalkulator Płytek

Count tiles needed for any room with waste built in.

Kalkulator Kredytu Hipotecznego

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

Solar Panel Savings Calculator

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

Kalkulator BTU Klimatyzatora

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

Kalkulator Napiwku

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

Kalkulator Rabatu

Find the sale price and savings for any percent off.

Pensja na Stawkę Godzinową

Convert an annual salary into an hourly rate.

Stawka Godzinowa na Pensję

Convert an hourly wage to monthly and annual income.

Kalkulator ROI

Compute return on investment and annualized return.

Kalkulator Marży Zysku

Compute gross profit and margin from revenue and cost.

Kalkulator Stawki Freelancera

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

Kalkulator Pomodoro

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

Kalkulator Nadgodzin

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

Kalkulator Kosztu Spotkania

Calculate what a meeting truly costs in payroll dollars.

Kalkulator Wieku

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

Dni do Świąt

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

Kalkulator Cyklu Snu

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

Przewidywany Termin Porodu

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

Kalkulator Dni Roboczych

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

Rzut Monetą

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

Rzucanie Kością

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

Generator Liczb Losowych

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

Generator Tak lub Nie

Let randomness decide. A fair coin flip with words.

Kalkulator Znaku Zodiaku

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

Kalkulator Kompatybilności Miłosnej

Just-for-fun compatibility score from two names.

Kalkulator Kosztu Prysznica

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

Kalkulator Kremu z Filtrem

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

Kalkulator Czasu Czytania

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

Kalkulator Prędkości Audiobooka

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

Kalkulator BMI

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

Kalkulator Kalorii

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

Kalkulator Spożycia Wody

Estimate your daily water target adjusted for activity and climate.

Kroki na Mile

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

Kalkulator Procentów

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

Kalkulator Powierzchni

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

Konwerter Cyfry Rzymskiej

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

Binarny na Dziesiętny

Convert between binary and decimal in either direction.

Kalkulator Ułamków

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

Currency Converter

Quick approximate currency conversion using static reference rates.

Tłumacz Pig Latin

Translate any text into Pig Latin instantly.

Tekst do Góry Nogami

Flip your text upside down with Unicode tricks.

Licznik Słów

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.

Kalkulator Kosztu Parkowania

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

Kalkulator Kosztu Wymiany Oleju

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.

Kalkulator Prędkości Roweru

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.

Ślad Węglowy Podróży

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.

Kalkulator Mil Rocznie

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.

Kalkulator Odległości

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.

Kalkulator Czasu Lotu

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.

Konwersja Rozmiaru Buta

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

Konwerter Rozmiaru Pierścionka

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

Kalkulator Rozmiaru Sukienki

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

Kalkulator Rozmiaru Dżinsów

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

Kalkulator Rozmiaru Czapki

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

Kalkulator Rozmiaru Paska

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

Kalkulator Rozmiaru Kurtki

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

Kalkulator Rozmiaru Rękawiczek

Find your glove size from hand circumference at the knuckles.

Kalkulator Rozmiaru Skarpet

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

Kalkulator Rozmiaru Koszulki

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

Kalkulator Rozmiaru Spodni

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

Konwerter Rozmiarów Odzieży

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

Rozmiar Buta z USA na UK

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

Rozmiar Buta z UK na USA

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

Rozmiar Buta Męski na Damski

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

Kalkulator Rozmiaru Buta Dziecięcego

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

Kalkulator Włóczki

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

Konwerter Rozmiaru Drutów do Robótek

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

Kalkulator Lamówki Narzuty

Compute strips and yardage for quilt binding.

Kalkulator Trójkąta Połowy Kwadratu

Cut size and square count for half-square triangles.

Kalkulator Paneli Zasłon

Compute panel width and required fabric for window curtains.

Kalkulator Długości Gumki

Find elastic length for waistbands, cuffs, and necklines.

Kalkulator Nici do Szycia

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

Kalkulator Długości Sznurówek

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

Kalkulator Zgubionych Skarpet

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

Kalkulator Bikini

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

Kalkulator Tapety

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

Kalkulator Dostępności Czynszu

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

Koszt Remontu Domu

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

Kalkulator Kosztu Przeprowadzki

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

Kalkulator Wielkości Trawnika

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

Kalkulator Kosztu Ogrodzenia

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

Storage Unit Size

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

Wielkość Choinki

Find the right tree height and width for your room.

Czas Palenia Świecy

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

Wartość R Izolacji

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.

Kalkulator GPA

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

Kalkulator Ocen

Compute your weighted course grade across up to 5 assignments.

Kalkulator Wyniku Testu

Compute percentage and letter grade from correct answers.

Kalkulator Godzin Pracy

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

Kalkulator Faktury

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

Kalkulator Progu Rentowności

Units and revenue needed to cover fixed and variable costs.

Licznik Znaków

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

Tester Siły Hasła

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

Konwerter Rozmiaru Czcionki

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

Sat Score Calculator

Approximate scaled SAT scores from raw section scores.

Liczby na Słowa

Spell out any number up to a trillion in English.

Generator Odwróconego Tekstu

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

Nato Phonetic Alphabet

Spell any word using the NATO phonetic alphabet.

Kalkulator Czasu Nauki

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

Konwerter Stref Czasowych

Convert a time between major world time zones.

Kalkulator Daty Emerytury

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

Dni do Urodzin

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

Kalkulator Dni Pracujących

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

Kalkulator Pory Snu

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

Kalkulator Pory Pobudki

Find the best wake times after a chosen bedtime.

Minutnik Odliczający

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

Kalkulator Jak Dawno Temu

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

Kalkulator Wieku Koreańskiego

Convert international age to traditional Korean age.

Kalkulator Faz Księżyca

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

Palindrome Date Finder

Find all palindrome dates in a given year.

Kalkulator Roku Przestępnego

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

Kalkulator Czasu Trwania

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

Czas na Dziesiętny

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

Kalkulator Audiobooków

Plan your audiobook reading pace and yearly book goals.

Czas Trwania Serialu TV

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

Kalkulator Maratonu Seriali

Find your binge finish date based on daily watch time.

Kalkulator Zawieszenia Hamaka

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

Kalkulator Balonów Helowych

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

Kalkulator Rozmiaru Namiotu

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

Kalkulator Numerologii

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

Generator Szczęśliwych Liczb

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

Kalkulator Dni Minecraft

Convert between real minutes and Minecraft in-game days.

Robux na USD

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

Kalkulator Szans w Pokerze

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

Kalkulator Rankingu Szachowego

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

Kalkulator Białka

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

Kalkulator Makroskładników

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

Kalkulator Tkanki Tłuszczowej

Estimate body fat percentage with the US Navy method.

Kalkulator Idealnej Wagi

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

Kalkulator Tempa Biegu

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

Spalone Kalorie

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.

Kalkulator Stóp Sześciennych

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

Hex na Dziesiętny

Convert between hexadecimal and decimal, with binary preview.

Kalkulator Naukowy

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

Ocena na GPA

Convert a letter grade or percentage into GPA points.

Kalkulator Wyzwania Czytelniczego

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

Jak Długo Czytać Książkę

Estimate hours to read a book at your pace.

Stron na Godzinę

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

Liczba Słów Książki

Typical word counts and page estimates by genre.

Kalkulator Celu Goodreads

Are you on pace for your Goodreads reading challenge?

Liczba Stron Kindle

Convert KOLL Kindle pages to print pages and words.

Kalkulator Kąpiel vs Prysznic

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

Kalkulator Wzrostu Włosów

Months to grow your hair to a target length.

Kalkulator Kosmetyków

Annual cost of your beauty routine.

Kalkulator Pasty do Zębów

Tubes per year and annual toothpaste cost.

Czas Mycia Rąk

WHO-recommended hand-washing time and song references.

Kalkulator Kosztu Pielęgnacji Skóry

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

Trwałość Perfum

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

Koszt Farbowania Włosów

Annual hair color cost by method and frequency.

Kalkulator Kosztu Makijażu

Annual cost of your makeup kit.

Kalkulator Zużycia Mydła

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

Kalkulator Maseczek

Masks needed per month and annual cost by type.

Jak Bogaty Jestem

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

Net Worth Calculator

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

Kalkulator Wyniku IQ

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

Kalkulator Fantasy Football

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

Wpływ Zakazu Mediów Społecznościowych

Estimate reach and revenue lost if your account is banned.

Alternatywy dla Czasu na TikToku

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

Alternatywy dla Czasu w Mediach Społecznościowych

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.

Kalkulator Proporcji

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.

Kalkulator Wyniku ACT

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

Kalkulator GPA Studenckiego

Compute term and cumulative GPA on the 4.0 scale.

Kalkulator Oceny Końcowej

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

Kalkulator Krzywej Ocen

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

Kalkulator Roku Ukończenia

Find your high-school and college graduation years.

Kalkulator GWA

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

Kalkulator GPA Liceum

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

Kalkulator Wyniku IELTS

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

Kalkulator Współczynnika Wpływu

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

Kalkulator Wyniku PTE

Weighted overall PTE Academic score with CEFR equivalent.

Kalkulator Oceny Semestralnej

Weighted course grade across all assignments.

Kalkulator Oceny z Testu

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

Kalkulator GPA Pakistan

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

Kalkulator Rozstawu w Klasie

Maximum desks in a room given social-distancing spacing.

Kalkulator Proporcji Obrazu

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

Kalkulator Rozmiaru Pliku Obrazu

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

Kalkulator PPI

Pixels per inch from screen resolution and diagonal size.

Kalkulator Rozmiaru Ekranu

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

Kalkulator Rozmiaru TV

Recommended TV diagonal for your seating distance.

Kalkulator Wysokości Montażu TV

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

Kalkulator Rozmiaru Pliku Wideo

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

Kalkulator Ekspozycji

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

Kalkulator Głębi Ostrości

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

Kalkulator Ogniskowej

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

Kalkulator Współczynnika Kadrowania

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

Kalkulator Skali Rozdzielczości

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

Kalkulator Time-lapse

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

Kalkulator Czasu Migawki

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

Kalkulator Pola Widzenia

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

Kalkulator Odległości Hiperfokalnej

The focus distance that maximizes depth of field.

Kalkulator Pikseli na Rozmiar Wydruku

Maximum print size for an image at a chosen DPI.

Kalkulator Projektora

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

Kalkulator Proporcji Obrazu

Resize an image keeping its aspect ratio.

Kalkulator Kontrastu

Display contrast ratio from white and black luminance.

Kalkulator Powiększenia Soczewki

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

Kalkulator Zdjęcia bez Mrugania

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

Kalkulator Klatek na Timecode

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

Kalkulator Timecode na Klatki

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

Kalkulator Filmu

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

Kalkulator Przesady Pionowej

Vertical exaggeration factor for profiles and cross-sections.

Kalkulator Renderowania 3D

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

Kalkulator Bitrate Streamingu

Recommended streaming bitrate and required upload speed.

Kalkulator BPM

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

Kalkulator Częstotliwości Nut

Frequency of any musical note in equal temperament.

Kalkulator Interwału Muzycznego

Name the interval between two notes and its frequency ratio.

Kalkulator Skali Muzycznej

Generate the notes of any scale from a root note.

Kalkulator Akordów

Notes and intervals for any chord from a root note.

Wyszukiwarka Akordów

Identify a chord from a set of notes.

Kalkulator Inwersji Akordów

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

Generator Progresji Akordów

Build a chord progression in any key.

Transpozycja Akordów

Transpose a chord progression to a new key.

Kalkulator Transpozycji Muzycznej

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

Kalkulator Półtonów

Count the semitones between two notes.

Kalkulator Tonacji

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

Kalkulator Czasu Trwania Utworu

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

Kalkulator Delay i Reverb

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

Kalkulator Progów

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

Kalkulator Napięcia Strun Gitary

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

Kalkulator Szeregu Harmonicznego

First 16 harmonics of a fundamental frequency.

Kalkulator Skali Głosu

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

Kalkulator Obudowy Głośnika

Recommended enclosure volume for a driver.

Kalkulator Długości Tunelu

Port length for a vented speaker enclosure.

Kalkulator Rozmiaru Pliku Audio

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

Kalkulator Czasu Pracy Baterii

Estimate device runtime from battery capacity and consumption.

Kalkulator Pojemności Baterii

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

Kalkulator Rozmiaru Baterii

Minimum battery capacity for a target runtime.

Kalkulator Czasu Lotu Drona

Estimate drone flight time from battery and motor draw.

Kalkulator Silnika Drona

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

Kalkulator Cyklu Pracy

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

Kalkulator eDPI

Effective DPI for FPS mouse sensitivity comparison.

Kalkulator Entropii Hasła

Estimate password strength in bits of entropy and crack time.

Kalkulator RAID

Usable storage and fault tolerance for a RAID array.

Kalkulator chmod

Convert Unix file permissions to octal and symbolic notation.

Kalkulator Podsieci IP

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

Kalkulator CIDR

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

Kalkulator Przepustowości

Required bandwidth to transfer a file in a target time.

Kalkulator Czasu Wysyłania

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

Kalkulator Uptime

Allowed downtime for a given uptime percentage.

Kalkulator Transferu Danych

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

Kalkulator Szybkości Baud

Effective data throughput of a serial connection.

Konwerter Adresu IP

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

Koder Base64

Encode text to Base64 or decode Base64 back to text.

Konwerter ASCII

Convert text to ASCII codes and back.

Kalkulator Kodu Hamminga

Add Hamming parity bits to a binary data word.

Kalkulator Odległości Hamminga

Count differing bits between two binary strings.

Kalkulator Bitu Parzystości

Compute the parity bit for a binary data word.

Kalkulator Bramki Logicznej

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

Kalkulator Wzmocnienia Op-Amp

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

Kalkulator Szerokości Ścieżki PCB

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

Kalkulator Rezystancji Ścieżki PCB

Resistance and voltage drop of a PCB copper trace.

Kalkulator Prądu Ścieżki PCB

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

Kalkulator Impedancji PCB

Characteristic impedance of a microstrip PCB trace.

Kalkulator Impedancji Kabla

Characteristic impedance of a coaxial cable.

Kalkulator Opóźnienia Propagacji

Signal travel delay through a trace or cable.

Kalkulator LM317

Resistor value for a target LM317 regulator output voltage.

Kalkulator Opóźnień RAM

True memory latency in nanoseconds from CL and frequency.

Kalkulator Dopasowania Impedancji

L-network component values to match two impedances.

Kalkulator THD

THD from a fundamental and its harmonic amplitudes.

Konwerter Jednostek RF

Convert RF power between dBm, watts, and dBW.

Kalkulator Szyfru Vigenère'a

Encrypt or decrypt text with the Vigenère cipher.

Konwerter Hex na Tekst

Decode a hexadecimal string into readable text.

Kalkulator Zmiennoprzecinkowy

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

Kalkulator GSD

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

Kalkulator BDP

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

Kalkulator KD

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

Generator Okręgów Minecraft

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

Kalkulator Stosów Minecraft

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

Kalkulator Portalu Nether

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

Wyszukiwarka Portalu Endu

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

Kalkulator Cukierków Pokémon GO

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

Kalkulator Bloków Piramidy

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

Kalkulator Rozkładu Rust

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

Kalkulator Szans Impostora

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

Kalkulator CBM

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

Kalkulator Wagi Wymiarowej

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

Kalkulator DPMO

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

Kalkulator Klasy Frachtu

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

Kalkulator Palet

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

Kalkulator Punktu Zamawiania

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

Kalkulator Czasu Takt

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

Kalkulator Załadunku Kontenera

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

Odliczanie do Bożego Narodzenia

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

Kalkulator Wielkanocy

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

Kalkulator Bałwana

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

Kalkulator Apokalipsy Wampirów

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

Kalkulator Inwazji Zombie

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

Kalkulator Cukierek albo Psikus

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

Kalkulator Białych Świąt

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

Konwerter Kalendarza Majów

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

Kalkulator Postanowień Noworocznych

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

Kalkulator Temperatury Odczuwalnej

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

Kalkulator Opadów

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

Kalkulator Deszczu na Śnieg

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

Kalkulator Opalania

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

Kalkulator Trzęsień Ziemi

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

Kalkulator Antypodów

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

Kalkulator Azymutu

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

Kalkulator Odległości Szerokość-Długość

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

Kalkulator Wskaźnika Zaangażowania

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

Kalkulator Czasu Butli Tlenowej

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

Kalkulator Wagi Diamentu

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

Kalkulator Luki Płacowej

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

Kalkulator PERT

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

Kalkulator NaNoWriMo

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

Kalkulator Masy Solnej

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

Kalkulator Napiwku za Pizzę

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

Kalkulator Matched Betting

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

Kalkulator Dnia Tygodnia

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

Kalkulator Czasu Rekrutacji

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

Kalkulator Akwarium

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

Kalkulator Grubości Szkła Akwarium

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

Kalkulator Piaskownicy

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

Szyfr Cezara

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

Kalkulator Flagi USA

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

Kalkulator HP 5e

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

Kalkulator Spotkań 5e

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

Kalkulator Kupowania Punktów 5e

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

Kalkulator EV w Pokerze

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

Małe Litery na Wielkie Litery

Convert any lowercase text to UPPERCASE instantly in your browser.

Konwerter Wielkich Liter Początkowych

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

Konwerter Stylu Zdaniowego

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

Generator Kapitalików

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

Generator Małego Tekstu

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

Generator Tekstu Przekreślonego

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

Generator Indeksu Dolnego

Convert numbers and letters to Unicode subscript characters.

Generator Indeksu Górnego

Convert numbers and letters to Unicode superscript characters.

Generator Czcionki Gotyckiej

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

Generator Tekstu Lustrzanego

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

Konwerter Liczb na Litery

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

Konwerter Liter na Liczby

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

Identyfikator Hash

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

Kalkulator Proporcji 16:9

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

Kalkulator Proporcji 16:10

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

Kalkulator Proporcji 4:3

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

Kalkulator Proporcji CSS

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

Kalkulator Proporcji Piksela

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

Kalkulator Proporcji Pionowych

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

Kalkulator Proporcji Ekranu

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

Dni do Jesieni

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

Dni do Walentynek

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

Odliczanie do Nowego Roku

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

Kalkulator Wagi w Karatach

Convert gemstone weight in grams to carats and points.

Kalkulator Karatów Diamentu

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

Konwersja mm na Karaty

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

W Której Klasie Byłem

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