Unit Converter
Convert between common units of length, weight, temperature, and more.
Result
Quick Reference — Length
About the Unit Converter
Convert between units of length, weight, temperature, data storage, speed, and more. Results update as you type, so you can compare several target units at once instead of running a separate calculation for each.
How to use it
- 1 Pick the category you need, such as length or data storage.
- 2 Enter a value and choose the unit it is in.
- 3 Select the unit to convert to.
- 4 The result updates instantly as you type.
What it does
- Length, weight, temperature, area, volume, speed, time and data storage
- Metric and imperial units
- Live conversion with no button press
- Sensible precision without misleading trailing digits
Frequently asked questions
Is my input sent anywhere?
No. Every calculation happens locally in your browser using JavaScript. Nothing you paste is uploaded, logged, or stored on a server, which makes the tool safe to use with production data, credentials, and customer records.
Is a kilobyte 1000 or 1024 bytes?
Both definitions are in use, which is exactly why disk sizes never match what the operating system reports. Storage manufacturers use the decimal SI meaning, 1 kB = 1000 bytes. Operating systems and memory use the binary meaning, 1 KiB = 1024 bytes. A "1 TB" drive shows as roughly 931 GiB for this reason.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32. So 20°C is (20 × 1.8) + 32 = 68°F. Temperature is unlike other units because the scales have different zero points, which is why you cannot convert a temperature by multiplying alone.
Why do imperial units differ between the US and UK?
They diverged. A US fluid ounce is about 29.6 ml while an imperial one is about 28.4 ml, and a US gallon is roughly 3.79 litres against the imperial 4.55. Recipes and fuel figures that cross the Atlantic without conversion are meaningfully wrong.