Tools · 38 converters

Unit converters
with the formula up front.

Every conversion shows the formula and a step-by-step calculation — the same math we teach in the lessons.

38/38

Most popular

8 units
Length
From millimeters to miles — SI and imperial units.
8 units
Mass
Grams, kilograms, pounds, ounces and tons.
8 units
Volume
Liters, milliliters, gallons and cups.
4 units
Temperature
Celsius, Fahrenheit and Kelvin.

The rest

7 units
Area
Square meters, hectares, acres and square feet.
9 units
Time
Seconds, minutes, hours, days and years.
6 units
Data (SI)
Bits and bytes in the decimal system (kB, MB, GB).
6 units
Data (IEC)
Bits and bytes in the binary system (KiB, MiB, GiB).
5 units
Force
Newtons, kilonewtons, kilogram-force and pound-force.
8 units
Pressure
Pascals, bars, atmospheres, psi and millimeters of mercury.
6 units
Power
Watts, kilowatts, megawatts and horsepower (PS/hp).
8 units
Energy
Joules, calories, kilocalories and kilowatt-hours.
6 units
Speed
Meters per second, km/h, miles per hour and knots.
6 units
Angle
Radians, degrees, gradians and arcminutes.
6 units
Frequency
Hertz, kilohertz, megahertz, gigahertz and RPM.
5 units
Astronomical distances
Kilometers, astronomical units, light-years and parsecs.
5 units
Historical Polish units (length)
Ells, fathoms, rods and inches from the 1819 decimal system.
6 units
Data rate
Bits, kilobits, megabits and gigabits per second, plus megabytes per second.
5 units
Electric charge
Coulombs, milliamp-hours and amp-hours.
5 units
Density
Kilograms per cubic meter, grams per cubic centimeter and pounds per cubic foot.
5 units
Acceleration
Meters per second squared, standard gravity (g) and gals.
6 units
Pace
Minutes per kilometer, kilometers per hour, minutes per mile and seconds per kilometer.
5 units
Luminance
Candelas per square meter (nits), foot-lamberts and stilbs.
5 units
Torque
Newton-meters, kilogram-force meters and pound-force feet.
5 units
Flow rate
Liters per second, liters per minute and cubic meters per hour.
4 units
Angular velocity
Radians per second, degrees per second and revolutions per minute (rpm).
4 units
Magnetic flux density
Teslas, millitesla, microtesla and gauss.
4 units
Illuminance
Lux, kilolux, foot-candles and phots.
4 units
Viscosity
Pascal-seconds, poises and centipoises.
5 units
Typography
Pixels, points, picas, millimeters and em.
3 units
Absorbed dose
Grays, rads and erg per gram.
2 units
Equivalent dose
Sieverts and rems.
2 units
Radioactivity
Becquerels and curies.
2 units
Radiation exposure
Coulombs per kilogram and roentgens.
3 units
Decibels
Decibels, bels and nepers.
4 systems
Number systems
Binary, octal, decimal and hexadecimal — the same number in four bases.
6 formats
Text encoding
Base64, hex, binary and URL — the same text in different representations.
4 formats
Colors
HEX, RGB, HSL and oklch — the same color in different representations.

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