Unit Converter
Convert between common units of length, weight, volume, area, and temperature.
Recommended next steps
Related tools
Solve common percentage problems quickly.
Simplify ratios and solve proportions.
Convert between Roman and Arabic numerals in the 1 - 3999 range.
Frequently asked questions
Length (meters, kilometers, miles, feet, inches, centimeters), weight (kilograms, grams, pounds, ounces), volume (liters, milliliters, US gallons, US fluid ounces), area (square meters, square kilometers, square feet, acres), and temperature (Celsius, Fahrenheit, Kelvin).
Volume conversions use the US gallon (3.785 411 784 L) and US fluid ounce. UK / imperial gallons are not supported in this version.
Temperature is not a simple linear factor — Celsius, Fahrenheit, and Kelvin use offsets. The converter routes everything through Kelvin internally so 0 °C correctly maps to 32 °F and 273.15 K.
They use the internationally-defined exact relationships where they exist (1 inch = 25.4 mm, 1 mile = 1609.344 m, 1 US gallon = 3.785411784 L). Displayed results are rounded for readability — open the developer tools if you need a higher-precision intermediate value.
Last updated 2026-06-03.