Certified tool
Length Converter
Convert meters, feet, inches, miles, and other length units with exact SI-defined factors.
Exact defined conversion
3.280840 ft
1 m → Foot (international)
Cross-system conversion: SI / metric → international customary. Factors are not silently aliased.
Systems: si → international.
Assumptions
- The international inch is exactly 0.0254 m. The international foot is exactly 0.3048 m.
- The US survey foot is not offered and is not substituted.
- Negative lengths are rejected.
Examples
- 1 inch = 2.54 centimeters (exact).
- 1 foot = 0.3048 meters (exact).
- 1 international mile = 1.609344 kilometers (exact).
How to use
- Enter a non-negative length.
- Choose the starting unit and the target unit. International customary units are labeled.
- Set decimal places if you need fewer or more digits than the default.
- Use Swap to exchange units and carry the converted value into the input.
- Copy the rounded result when you need it elsewhere.
Limitations
- This is a unit converter, not a map or surveying instrument.
- Results use IEEE-754 floating point with deterministic display rounding.
- Very large or tiny values can lose trailing digits.
FAQ
- Is a US foot different from an international foot?
- This tool uses the international foot (0.3048 m exact). The older US survey foot is a different definition and is not mixed in.
- Why are there no centimeter-to-inch pair pages?
- Pair queries are answered here. Hundreds of X-to-Y URLs would duplicate this converter without adding a new job.