Unit Converter
Choose a category, enter a value, and pick your units. Conversion happens instantly.
Supported conversions
Length covers millimeters through kilometers plus inches, feet, yards, and miles. Weight covers grams, kilograms, ounces, and pounds. Temperature converts between Celsius, Fahrenheit, and Kelvin. Area covers square meters through acres and hectares. Volume covers milliliters through gallons and common cooking measures. Speed covers m/s, km/h, mph, and knots.
About the Unit Converter
The Unit Converter converts length, weight, temperature, area, volume and speed. Choose a category, pick the units and see the result instantly. It is handy for cooking, travel, school and DIY.
Most units convert by a fixed factor, such as 1 inch = 2.54 centimetres and 1 pound = 0.45359237 kilograms. Temperature is different, because Celsius, Fahrenheit and Kelvin use different zero points, so formulas such as F = C × 9/5 + 32 are used. Be careful with US and UK gallons and with tons, which have different definitions.
How to use it
- Choose a category.
- Select the From and To units.
- Enter the value.
- Read the converted value.
Tips and good to know
- Check whether you need US or imperial units.
- Round sensibly for the purpose.
- Use the Land Area Calculator for regional land units.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply by 1.8 and add 32.
Are results exact?
They use standard conversion factors.
Which units are supported?
The common ones in each category.