Length Converter
Convert distances among inches, feet, yards, miles, millimeters, centimeters, meters, kilometers, and nautical miles. Choose a source and destination, swap them, or compare the same distance across every supported unit.
Length Converter tool
About the Length Converter
Use this tool for travel distances, classroom problems, plans, and measurements that mix US customary and metric units. International definitions are used, rather than the legacy US survey foot.
How Is Length Calculated?
Use the dimensions and definitions below. Calculations use unrounded intermediate values; displayed results are rounded.
Value in destination units = value × source meters per unit ÷ destination meters per unit
Example
1 mile × 1609.344 = 1,609.344 meters.
How to Use the Length Converter
- Enter the distance.
- Choose the source unit.
- Choose the destination unit.
- Read the main result and all-units table.
- Use Swap for the reverse conversion or Reset for the example.
Length Converter Examples
Miles to meters
1 mile × 1609.344 = 1,609.344 meters.
Feet to inches
5 feet × 12 = 60 inches.
Measurement and input conventions
No. A nautical mile is exactly 1,852 meters; an international mile is exactly 1,609.344 meters.
The defined conversion factors are exact. Displayed answers are rounded.
Using the result responsibly
It exchanges the source and destination units while retaining the entered number.
Keep adequate precision when transferring results to another calculation. Rounding a displayed result too early can change a later answer.
Frequently Asked Questions
Is a nautical mile the same as a mile?
No. A nautical mile is exactly 1,852 meters; an international mile is exactly 1,609.344 meters.
Are the factors exact?
The defined conversion factors are exact. Displayed answers are rounded.
Which foot is used?
The international foot, exactly 0.3048 meter, is used. Historical survey measurements can differ.
Can I enter negative values?
Yes. Signed values can represent position or displacement rather than a physical length.
What does Swap do?
It exchanges the source and destination units while retaining the entered number.