Unit Converter
Convert between length, weight, volume, and more
About the Unit Converter
The Unit Converter switches lengths between metric and imperial units: kilometres, metres, centimetres, miles, yards, feet and inches. It is useful for travel, DIY projects, sports distances and school work.
How it works
Every unit is first converted to kilometres using an exact factor (for example, 1 mile = 1.609344 km and 1 inch = 2.54 cm by international definition), then converted from kilometres to the target unit. Going through one base unit keeps every conversion consistent.
How to Use Unit Converter
Enter Your Data
Enter the value you want to convert.
Run the Tool
Choose the unit you're converting from and the unit you're converting to.
Use the Result
Press Convert to see the result.
Why Use Our Unit Converter?
100% Free
No registration, no hidden fees, no limits — ever.
Privacy First
All processing runs in your browser. Your data never leaves your device.
Mobile Friendly
Works perfectly on phones, tablets, and desktops.
Instant Results
Results appear as soon as you run the tool.
Frequently Asked Questions
Q. How many feet are in a metre?
One metre is about 3.281 feet, and one foot is exactly 0.3048 metres.
Q. How many kilometres is a marathon?
A marathon is 42.195 km, or about 26.2 miles.
Q. Are the conversion factors exact?
Yes. Since the 1959 international yard and pound agreement, the inch is defined as exactly 2.54 cm, so all imperial length conversions are exact.