Every Calculator You Need

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Mortgage Calculator

Monthly repayments, total cost & interest

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Salary Calculator

Take-home pay after tax — UK & US

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Income Tax Estimator

Estimate your tax bill from gross income

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Bonus Calculator

Bonus take-home after tax — UK & US

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Currency Converter

Live exchange rates between 170+ currencies

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Loan / EMI Calculator

Monthly EMI, total interest and cost

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Compound Interest

Investment growth over time with compounding

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Savings Goal

How much to save monthly to hit your target

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Retirement Calculator

Project your pension pot and retirement age

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VAT / GST Calculator

Add or remove VAT / GST from any amount

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Tip & Split

Calculate tip and split a bill between people

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ROI Calculator

Return on investment and profit percentage

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BMI Calculator

Body Mass Index from height and weight

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Calories & BMR

Daily calorie needs and metabolic rate

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Daily Water Intake

Recommended water intake for your body weight

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Pregnancy Due Date

Calculate your expected delivery date

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Heart Rate Zones

Target heart rate zones for exercise

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Scientific Calculator

Full scientific and simple calculator

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Summation (Σ)

Sum any series — arithmetic, geometric or custom formula

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Percentage Calculator

What is X% of Y? Percentage change & more

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Discount Calculator

Sale price after percentage discount

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Average & Statistics

Mean, median, mode, range & std deviation

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Pythagorean Theorem

Find any side of a right triangle

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Fraction Calculator

Add, subtract, multiply and divide fractions

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Quadratic Solver

Solve ax² + bx + c = 0 instantly

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Prime Checker

Check if a number is prime and find its factors

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LCM & GCD

Lowest common multiple & greatest common divisor

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Scientific Notation

Convert numbers to and from scientific notation

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Logarithm Calculator

Log base n, natural log (ln) and log₁₀

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Number Base Converter

Binary, decimal, hex and octal conversion

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Triangle Calculator

Area, perimeter and angles from any sides

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Matrix Calculator

2×2 matrix operations — multiply, inverse, det

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Combinations & Permutations

nCr and nPr — count arrangements and selections

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Length Converter

metres, feet, miles, cm, km, inches and more

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Weight / Mass Converter

kg, lbs, grams, pounds, stone and more

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Temperature Converter

Celsius, Fahrenheit and Kelvin

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Data Storage Converter

Bytes, KB, MB, GB, TB and more

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Zakat Calculator

Calculate Zakat on savings, gold, silver & assets

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Fidya / Kaffarah

Expiation for missed fasts and broken oaths

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Hijri Calendar Converter

Convert between Hijri and Gregorian dates

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Age Calculator

Exact age in years, months and days

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Date Difference

Days, weeks and months between two dates

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Time Zone Converter

Convert times between world time zones

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Time Card Calculator

Total work hours from clock-in and clock-out times

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Time Duration

Add or subtract hours, minutes and seconds

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Day of Week

Find what day of the week any date falls on

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Speed / Distance / Time

Solve for speed, distance or time

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Ohm's Law

Solve voltage, current or resistance (V=IR)

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GPA Calculator

Calculate your grade point average

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Density Calculator

Solve density, mass or volume (ρ = m/V)

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Molarity Calculator

Molar concentration for chemistry solutions

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Molecular Weight

Calculate molar mass from chemical formula

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Resistor Color Code

Decode resistor band colors to ohm values

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Square Footage

Calculate room or floor area in sq ft or m²

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Tile Calculator

Number of tiles needed for any room

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Gravel & Sand

Volume and weight of gravel or sand needed

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Mulch Calculator

Bags or cubic yards of mulch for garden beds

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Roofing Calculator

Roofing squares and materials estimate

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Stair Calculator

Staircase rise, run and number of steps

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Fuel / Mileage

MPG, L/100km and fuel economy calculations

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Gas & Trip Cost

Total fuel cost for any road trip

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Horsepower

Convert HP, kW and torque

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Tire Size

Compare tire sizes and calculate diameter

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Wind Chill

Feels-like temperature in cold and wind

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Dew Point

Dew point from temperature and humidity

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Heat Index

Feels-like temperature in heat and humidity

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Sleep Cycle

Best wake-up times based on sleep cycles

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Electricity Cost

Cost of running appliances from watts and hours

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GDP Calculator

Calculate GDP using expenditure approach

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Bandwidth

Download time and required bandwidth

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URL Encode / Decode

Encode or decode URLs and query strings

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Base64 Encoder / Decoder

Encode or decode Base64 strings

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Roman Numerals

Convert numbers to and from Roman numerals

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Shoe Size Converter

US, UK and EU shoe size chart and converter

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Love Compatibility

Fun compatibility score between two names

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Golf Handicap

WHS handicap index from your recent scores

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