What is the Unit Converter?
The Unit Converter changes a value from one unit to another in a few clicks. It supports length (metres, kilometres, centimetres, miles, feet and inches), weight (kilograms, grams, pounds and ounces), digital data (bytes, KB, MB and GB) and temperature (Celsius, Fahrenheit and Kelvin). Results appear instantly with up to eight significant digits, so you get precise answers without working out a formula by hand.
How to use the Unit Converter
- Choose the type of measurement, such as Length or Temperature.
- Enter the number you want to convert in the Value box.
- Select the unit you are converting From and the unit you want To.
- Read the converted result in the box below, which updates as you change any field.
Benefits and use cases
- Students solving physics, chemistry and maths problems with mixed units.
- Shoppers and travellers comparing sizes, weights and temperatures between metric and imperial systems.
- Cooks and DIY fans following instructions written in unfamiliar units.
- IT users working out file sizes and storage in different data units.
Tips for best results
Round the result sensibly for your task: two decimals are plenty for cooking, while engineering work may need more digits. Remember that 1 kilobyte can mean 1,000 or 1,024 bytes depending on the context, so check which standard your device or provider uses. When converting temperature for recipes, double-check the oven setting after you convert.
ToolZen tools run in your browser, so your input is not uploaded to a server. Bookmark this page and come back whenever you need it. There is nothing to install and no account to create.
Frequently asked questions
Which data size standard is used?
Data units use 1,024 as the multiplier, so 1 KB equals 1,024 bytes and 1 MB equals 1,024 KB.
How accurate are the results?
Values are calculated with standard conversion factors and shown to eight significant digits.
Can I convert temperature both ways?
Yes. Choose Temperature, then select any pair of Celsius, Fahrenheit and Kelvin.
Does it work offline?
Once the page has loaded, the calculation happens in your browser and does not need to contact a server.