About this unit converter
A unit converter changes a measurement from one unit into another — for example turning 10 miles into kilometers, or 70 °F into Celsius. Choose a category (length, weight/mass, temperature, area, volume or speed), pick the unit you have and the unit you want, then type your number. Most conversions are simple multiplication using exact standard factors; temperature uses formulas because the scales have different zero points. Students, cooks, travelers, engineers and DIY hobbyists all use a converter like this. It runs entirely in your browser, so nothing you type is uploaded or stored.
Frequently asked questions
- What units can I convert?
- You can convert length (meters, feet, miles and more), weight or mass (kilograms, pounds, ounces), temperature (Celsius, Fahrenheit, Kelvin), area, volume and speed. Pick a category, choose the two units, and type a number.
- Is the conversion accurate?
- Yes. It uses exact standard factors, such as 1 inch = 0.0254 meters and 1 pound = 0.45359237 kilograms, so results match official definitions. The answer is rounded for display but calculated at full precision.
- Does my data get uploaded?
- No. The converter runs entirely in your browser, so the numbers you enter never leave your device.