Convert feet to kilometres
1 ft = 0.0003048 km
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How many kilometres are in a foot?
One foot is 0.0003048 kilometres. To convert any amount, multiply by 0.0003048. Going the other way, one kilometre is 3280.8399 feet.
What is the formula to convert ft to km?
Multiply the foot figure by 0.0003048. So km = ft × 0.0003048. For a quick mental estimate, dividing by about 3280.84 gets you close enough for most everyday purposes.
What does a foot actually look like?
One foot is about the length of a standard ruler. The foot is exactly 0.3048 metres. It survives in aviation worldwide — altitudes are given in feet almost everywhere, including in fully metric countries.
And what is a kilometre?
One kilometre is about a 12-minute walk. The kilometre is the standard road-distance unit everywhere except the United States, the United Kingdom and a handful of small territories.
Is this conversion exact?
Yes. Since the 1959 international yard and pound agreement, the imperial and metric systems are related by exact definitions rather than measurements — the inch is exactly 25.4 mm and the pound exactly 0.45359237 kg. Everything derived from those, including this conversion, is therefore exact. Round at the end rather than partway through, since rounding ft before converting introduces an error the conversion then multiplies.
About ft to km
How to convert feet to kilometres
Multiply by 0.0003048. One foot is 0.0003048 kilometres, and one kilometre is 3280.8399 feet.
km = ft × 0.0003048
Worked example
10 ft = 0.003048 km. For a sense of scale, one foot is about the length of a standard ruler, and one kilometre is about a 12-minute walk.
About the foot
The foot is exactly 0.3048 metres. It survives in aviation worldwide — altitudes are given in feet almost everywhere, including in fully metric countries.
About the kilometre
The kilometre is the standard road-distance unit everywhere except the United States, the United Kingdom and a handful of small territories.
Quick reference
| feet | kilometres |
|---|---|
| 1 ft | 0.0003048 km |
| 2 ft | 0.0006096 km |
| 5 ft | 0.001524 km |
| 10 ft | 0.003048 km |
| 25 ft | 0.00762 km |
| 50 ft | 0.01524 km |
| 100 ft | 0.03048 km |
| 1000 ft | 0.3048 km |
Getting it right
This conversion is exact by definition, so the only limit on accuracy is how many digits you keep. Round at the end rather than partway through — rounding ft to a whole number before converting introduces an error that the conversion then multiplies.
Other length conversions
Convert kilometres back to feet, or pick any other pair with the full unit converter. Related: ft to m, ft to cm, ft to mm.