Convert between kilometers and feet in either direction.
How it works
The international foot is defined as exactly 0.3048 meters, so 1 km = 3,280.839895 ft exactly. Enter a value in either field and the other updates instantly.
What this does not include
This uses the international foot; the US survey foot (used in some older land-survey contexts) differs by a few parts per million, small enough to ignore for virtually every everyday use.
How to use this calculator
- Enter a value in kilometers or feet.
- The other field updates automatically.
Why isn’t 1 km exactly 3,281 feet?
3,280.839895 is the exact value — 3,281 is simply a common rounding, close enough for casual use but not exact.
When would I need feet instead of a metric unit?
Feet remain the standard for altitude in aviation, and for many construction and surveying contexts in the US and a few other countries.
Is the US survey foot different from the international foot?
Yes, very slightly — the US retired the survey foot for most purposes at the end of 2022 in favor of the international foot, which is what this calculator uses.
