Unit converters

Calculate great-circle distances between two coordinates using latitude and longitude.

Convert light years to kilometers, miles, astronomical units, and parsecs with precise astronomical calculations.

Convert sievert dose units between each other.

Convert temperature units.

Convert numbers between different bases (binary, ternary, quaternary, quinary, senary, septenary, octal, nonary, and decimal).

Convert length units.

Convert between different area units like square meters, feet, acres, and hectares

Calculate the recommended tire pressure for your bicycle based on rider weight, bike weight, tire width, and bike type. Get results in PSI, BAR, and kPa.

Convert kelvin temperature to corresponding color in RGB and other color formats.

Convert units of mass, such as kilograms, pounds, or grams, to other measurement units.

Convert between different units of volume (liters, gallons, cubic meters, etc.)

Convert between different units of volume flow rate (l/s, m³/h, gallon/min, etc.)

Convert units of frequency, such as hertz, kilohertz, megahertz, or revolutions per minute, to other measurement units.

Convert units of speed, such as kilometers per hour, miles per hour, meters per second, or knots, to other measurement units.

Convert units of pace, such as minutes per kilometer, minutes per mile, or seconds per meter, to other measurement units.

Convert units of pressure, such as pascals, bars, PSI, or torr, to other measurement units.

Convert units of illuminance, such as lux or foot-candles, to other measurement units.

Convert units of concentration, such as parts-per million (ppm), parts-per billion (ppb), or parts-per trillion (ppt), to other measurement units.

Convert units of voltage, such as volts, millivolts, or kilovolts, to other measurement units.

Convert units of electric current, such as amperes, milliamperes, or kiloamperes, to other measurement units.

Convert between different units of power (watts, kilowatts, etc.)

Convert between different units of apparent power (VA, kVA, MVA, etc.)

Convert between different units of reactive power (VAR, kVAR, MVAR, etc.)

Convert between different units of energy

Convert between different units of reactive energy (VARh, kVARh, MVARh, etc.)

Convert between different units of angle (degrees, radians, gradians, etc.)

Convert shoe sizes between Nike and Adidas for men's US sizing

Convert shoe sizes between Nike and Adidas for EU sizing

Convert shoe sizes between New Balance and Skechers for EU sizing

Convert crochet hook sizes between US, Metric (mm), and UK sizing systems.

Convert ring sizes between US, UK, EU, Japan, diameter (mm), and circumference (mm) sizing systems.

Convert between volume (cups) and weight (grams) for common cooking and baking ingredients

Calculate real car dimensions from diecast model scale, or find model size from real car measurements. Supports common scales like 1:18, 1:24, 1:43, 1:64.

Convert between different units of calories (cal, kcal, kJ, J) and sugar measurements (grams, teaspoons, tablespoons, ounces, cups).

Convert between CSS length units including pixels (px), centimeters (cm), millimeters (mm), inches (in), points (pt), and picas (pc).

Convert tire pressure between PSI, bar, and kPa units with common presets for cars, motorcycles, and bicycles

Convert between astronomical units (AU, light-years, parsecs) and regular length units (kilometers, miles, meters, feet)

Convert RAM memory units between bytes, kibibytes (KiB), mebibytes (MiB), gibibytes (GiB), and tebibytes (TiB) using binary 1024-based calculations.

Calculate paper dimensions for ISO A, B, C series and US sizes in millimeters, centimeters, inches, pixels, and points

Instantly convert numbers to and from millions. Enter 1 and get 1,000,000 — no need to count zeros. Fast, simple million number converter.

Instantly convert numbers to and from billions. Enter 1 and get 1,000,000,000 — no need to count zeros. Fast, simple billion number converter.

Instantly convert numbers to and from trillions. Enter 1 and get 1,000,000,000,000 — no need to count zeros. Fast, simple trillion number converter.

Instantly convert numbers to and from quadrillions. Enter 1 and get a number with 15 zeros — no need to count zeros. Fast, simple quadrillion number converter.

Instantly convert numbers to and from quintillions. Enter 1 and get a number with 18 zeros — no need to count zeros. Fast, simple quintillion number converter.

Instantly convert numbers to and from sextillions. Enter 1 and get a number with 21 zeros — no need to count zeros. Fast, simple sextillion number converter.

Instantly convert numbers to and from septillions. Enter 1 and get a number with 24 zeros — no need to count zeros. Fast, simple septillion number converter.

Instantly convert numbers to and from octillions. Enter 1 and get a number with 27 zeros — no need to count zeros. Fast, simple octillion number converter.

Instantly convert numbers to and from nonillions. Enter 1 and get a number with 30 zeros — no need to count zeros. Fast, simple nonillion number converter.

Instantly convert numbers to and from decillions. Enter 1 and get a number with 33 zeros — no need to count zeros. Fast, simple decillion number converter.

Convert height between metric units and imperial feet/inches.