Feet to Kilometers Converter

About the ft to km calculation

One foot is exactly 0.0003048 kilometers, so converting between them is a single multiplication. Enter any value above and the result updates as you type. Used for human height in the US and UK, and for altitude in aviation globally. The standard road-distance unit in most of the world.

Formula

km = ft × 0.0003048

1 ft = 0.0003048 km
1 km = 3,280.84 ft

Worked example

To convert 6 ft, multiply by 0.0003048: 6 × 0.0003048 = 0.0018288 km.

Frequently asked questions

How many kilometers are in a foot?

There are 0.0003048 kilometers in one foot. To convert any amount, multiply the number of feet by 0.0003048.

How do I convert kilometers back to feet?

Divide instead of multiplying, or equivalently multiply by 3,280.84. One kilometer is 3,280.84 feet.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between feet and kilometers is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.

Where is each of these units used?

Feet: used for human height in the US and UK, and for altitude in aviation globally. Kilometers: the standard road-distance unit in most of the world.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units