How this calculator works
Metric units scale by powers of ten. International inches, feet, yards and miles have fixed metric definitions: 1 inch = 2.54 cm and 1 mile = 1,609.344 m. Survey feet are not included.
The formula
Base amount = value × source factor
Target amount = base amount / target factorA quick example
10 km is approximately 6.213712 miles.
How to use this calculator
- Enter a value using a decimal point.
- Choose the source and target units.
- Read the live result or swap units to reverse the direction.
A few common questions
Which convention does this converter use?
Metric units scale by powers of ten. International inches, feet, yards and miles have fixed metric definitions: 1 inch = 2.54 cm and 1 mile = 1,609.344 m. Survey feet are not included.
Can I reverse the conversion?
Yes. Swap exchanges the units, keeps your input amount and calculates again.
Why is the displayed result rounded?
The calculation uses the full stored factor. Results show up to six decimal places, with scientific notation for very small or large amounts.
Reference: NIST conversion factors