Feet to Kilometers
( ft → km )
Instantly convert feet to kilometers. Enter any value below and get an accurate result with the full formula and reference table.
How to Convert Feet to Kilometers
To convert feet to kilometers, multiply the number of feet by 0.0003048. This factor comes from the definition: 1 foot = 0.3048 meters, and 1 kilometer = 1000 meters, so 1 ft = 0.3048 / 1000 = 0.0003048 km exactly.
Step-by-Step Example
Let’s convert 10,000 feet to kilometers:
1. Multiply by 0.0003048: 10,000 × 0.0003048 = 3.048 km
2. So 10,000 feet equals 3.048 kilometers.
For a distance of 5,280 feet (1 mile): 5,280 × 0.0003048 = 1.609344 km.
Why 0.0003048?
The foot was defined in terms of the meter in 1959 as exactly 0.3048 meters. Since 1 km = 1000 m, dividing 0.3048 by 1000 gives 0.0003048. This exact value ensures precision in conversions between imperial and metric systems.
When You’d Use Each Unit
Feet are common in the US and UK for height, room dimensions, and short distances. Kilometers are used for longer distances: road travel, geographic measurements, and race lengths in most countries. Converting between them is useful for understanding international maps, travel distances, and engineering projects.
Common feet values converted to kilometers — typical distances highlighted.
| Feet (ft) | Kilometers (km) | Approximate |
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