Conversion Calculator
Convert length measurements between metric and imperial units — millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
- Free to use
- Accurate results
- No registration required
- Works on all devices
This calculator converts a length value between metric and imperial units using exact international conversion constants.
Your result
3.107
Converted value
AI explanation
Formula
Converted value = amount × (from-unit-to-meters factor) ÷ (to-unit-to-meters factor)Worked example
5 kilometers to miles
| Field | Value |
|---|---|
| Amount | 5 |
| From unit | km |
| To unit | mi |
| Converted value | 3.106856 |
Assumptions
- Uses standard international unit conversion constants (1 mile = 1.609344 km exactly, 1 inch = 2.54 cm exactly, etc.).
Frequently asked questions
How accurate are these unit conversions?
This calculator uses exact, internationally defined conversion constants (e.g. 1 inch = 2.54 cm exactly), so results are as precise as the decimal places shown.
Can I convert between any two length units listed?
Yes — select any "from" and "to" unit combination, including converting a unit to itself (which simply returns the same value).
Does this calculator support area, volume, or weight conversions?
This calculator converts length only. Dedicated Area Converter, Volume Converter, and Weight Converter tools handle those unit families.