Unit Converter
What the unit converter does
It converts a value between two units within a category you pick — for example kilometres to miles, kilograms to pounds, or gigabytes to megabytes. Most categories work from a base unit and a factor table, so a conversion is simply your value scaled from one unit to another, which keeps the results exact and easy to reverse.
Why temperature is handled differently
Temperature scales do not share a zero point, so you cannot convert them by multiplying alone — 0 °C is not 0 °F. This tool uses the correct formulas to move between Celsius, Fahrenheit, and Kelvin, so boiling water reads 100 °C, 212 °F, and 373.15 K as it should.
Everyday uses
Reach for it when a recipe is in the wrong units, a package lists dimensions in centimetres but you think in inches, a download size is quoted in a unit you want to compare, or you are checking a speed limit abroad. Because it runs locally in your browser, conversions are instant and nothing you enter is uploaded.
Frequently asked questions
What can I convert between?
Length, mass (weight), temperature, data size, time, speed, area, and volume — pick a category, choose the two units, and enter a value.
Is the temperature conversion accurate?
Yes. Temperature uses its proper formulas (Celsius, Fahrenheit, Kelvin) rather than a single multiplier, so 100 °C correctly gives 212 °F.
Does data use 1024 or 1000?
Data sizes (KB, MB, GB, TB) are converted using 1024 (binary), the convention most operating systems use for file sizes.
Is my data private?
Completely — every conversion happens in your browser and nothing is uploaded.