How it works
A foot equals exactly 0.3048 metres; an inch equals 0.0254 metres. Multiply by the source factor to get metres, then divide by the target factor.
Result = value × source factor / target factor
Worked example
Show example inputs and result
Value: 100 · From unit: m · To unit: cm.
- Converted value
- 10,000 cm
Questions and answers
Which mile is used?
The international mile of 1,609.344 metres is used, not the nautical mile. All conversions are lengths, not areas.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Conversion reference: NIST SI Guide
Method reviewed: October 8, 2026 · Methods & accuracy