Length Converter
Metric and imperial lengths, converted instantly.
Runs on your device
At a glance
- Processing:
- Runs locally in your browser
- Privacy:
- Your files stay on your device — nothing is uploaded to a server
About this tool
Convert between millimetres, centimetres, metres, kilometres, inches, feet, yards and miles. Type once and see every unit update live — useful for DIY, travel, schoolwork and engineering estimates.
How to use it
- Enter a value.
- Choose the source unit.
- Choose the target unit and read the result.
- Swap units with one click if needed.
Frequently asked questions
How do I convert lengths?
Enter a value, pick the source and target units, and read the result instantly. For example: 1 meter = 3.28084 feet. All math runs locally in your browser.
Is my data uploaded or stored?
No. Unit conversion is pure arithmetic in your browser — nothing is sent, uploaded or stored.
How precise are the results?
Conversions use double-precision factors and display up to 6 significant decimals with trailing zeros stripped, so everyday and technical values both stay accurate.