Feet to Kilometers
Type a value in either box to convert between feet and kilometers. The factor is 0.0003048.
| Feet | Kilometers |
|---|---|
| 1 ft | 0.000305 km |
| 2 ft | 0.00061 km |
| 3 ft | 0.000914 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 |
How to use
- Enter a value in the Feet field.
- The Kilometers figure appears immediately — no button to press.
- Typing in the Kilometers field converts back to Feet the same way.
- Use the reference table for the values that come up most often.
Feet to Kilometers formula
The factor from feet to kilometers is 0.0003048.
km = ft × 0.0003048
Why this factor: the foot and the kilometer are both defined against the meter, so dividing one definition by the other gives 0.0003048 directly. Both definitions are set out in full below.
To go the other way, divide by 0.0003048 — or use the Kilometers to Feet converter, which is the same calculation reversed.
Worked example
Start with 100 ft. Multiply by 0.0003048 to get 0.03048 km.
100 ft × 0.0003048 = 0.03048 km
The converter above does this for any value you type, in either direction.
What is a foot?
A foot is twelve inches, the primary unit for human-scale dimensions in the US.
Definition: Exactly 0.3048 meter since 1959 — one third of the international yard.
Where it is used: Building heights, room dimensions, aviation altitude worldwide, and personal height in the US and UK.
Worth knowing: The US survey foot, very slightly longer, was used in land surveying until it was officially retired at the end of 2022.
What is a kilometer?
A kilometer is 1,000 meters, the standard unit for road distances and geography in most of the world.
Definition: Exactly 1,000 meters by SI prefix definition — 'kilo' means 10³.
Where it is used: Road signs, running and cycling distances, and map scales outside the US and UK.
Feet vs Kilometers
The foot is an imperial unit while the kilometer is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many kilometers are in a foot?
One foot equals 0.0003048 kilometers.
What is the formula to convert feet to kilometers?
Multiply the number of feet by 0.0003048. To reverse it, divide by 0.0003048 instead.
How do I convert kilometers back to feet?
Divide by 0.0003048, which is the same as multiplying by 3280.8399.
How many kilometers are in 10 feet?
10 ft works out to 0.003048 km.
Is there anything to watch out for with feet?
The US survey foot, very slightly longer, was used in land surveying until it was officially retired at the end of 2022.
How is the foot defined?
Exactly 0.3048 meter since 1959 — one third of the international yard.