The foot (ft) is an imperial and US customary unit, defined as exactly 0.3048 m, while the kilometer (km) is the metric unit for travel distances in most of the world. This conversion matters most in aviation and the outdoors, where cruising altitudes and US mountain elevations are quoted in feet but need comparing against metric maps.
To convert, multiply feet by 0.0003048: a jet cruising at 35,000 ft is flying at 35,000 × 0.0003048 = 10.668 km. Going the other way, 1 km is about 3,281 ft. For a quick mental estimate, divide the feet by 3,300 — that gives roughly 10.6 km for the same altitude, only about 0.6% below the exact figure.
Table Of Contents
Feet to kilometers Conversion
1 feet (ft) is equal to 0.0003048 kilometers (km).
1 ft = 0.0003048 km
or
1 km = 3280.839895 ft
Formula
To convert a length from feet (ft) to kilometers (km), divide the length in feet by 3280.839895
l(km) = l(ft) / 3280.839895
Examples:
Convert 50 feet to kilometers:
l(km) = 50ft / 3280.839895 = 0.01524 km
Conversion table
| Feet (ft) | Kilometers (km) |
|---|---|
| 1 ft | 3.048e-4 km |
| 2 ft | 6.096e-4 km |
| 3 ft | 9.144e-4 km |
| 5 ft | 0.001524 km |
| 6 ft | 0.0018288 km |
| 10 ft | 0.003048 km |
| 20 ft | 0.006096 km |
| 25 ft | 0.00762 km |
| 50 ft | 0.01524 km |
| 100 ft | 0.03048 km |
| 250 ft | 0.0762 km |
| 500 ft | 0.1524 km |
| 1000 ft | 0.3048 km |
| Kilometers (km) | Feet (ft) |
|---|---|
| 1 km | 3280.839895013 ft |
| 2 km | 6561.679790026 ft |
| 3 km | 9842.519685039 ft |
| 5 km | 16404.199475066 ft |
| 6 km | 19685.039370079 ft |
| 10 km | 32808.398950131 ft |
| 20 km | 65616.797900262 ft |
| 25 km | 82020.997375328 ft |
| 50 km | 164041.994750656 ft |
| 100 km | 328083.989501312 ft |
| 250 km | 820209.973753281 ft |
| 500 km | 1640419.947506561 ft |
| 1000 km | 3280839.895013123 ft |
Frequently asked questions
How do I convert feet to kilometers?
Divide the value in feet by 3280.839895 to get the result in kilometers. For example, 5 ft ÷ 3280.839895 = 0.001524 km.
How many kilometers are in 1 feet?
1 feet (ft) is equal to 3.048e-4 kilometers (km).
How do I convert kilometers back to feet?
Use the inverse operation: multiply the value in kilometers by 3280.839895 to get the result in feet.
How accurate is the feet to kilometers conversion?
The converter multiplies by the conversion factor 3280.839895 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
How many kilometers is 10,000 feet?
10,000 feet equals 3.048 km, a key reference altitude in aviation regulations. Other useful anchors: 1,000 ft is 0.3048 km, a typical skydive exit at 13,500 ft is about 4.11 km up, and Mount Everest at 29,032 ft stands roughly 8.85 km tall.
Why does aviation quote altitude in feet when distances are in kilometers?
Altitude in feet is a legacy standard from early US and British aviation that most of the world still follows for air-traffic separation, while ground distances in most countries are metric. That is why a flight can cruise at 36,000 ft, about 10.97 km, along a route measured in kilometers.
