Convert Feet per second to Kilometers per hour
One foot per second equals 1.09728 kilometers per hour. Type any value to convert feet per second to kilometers per hour instantly — with a full reference table below.
Convert Feet per second to Kilometers per hour
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How to convert Feet per second to Kilometers per hour
To convert feet per second to kilometers per hour, multiply by 1.09728. One foot per second equals 1.09728 km/h, and one kilometer per hour equals 0.911344 ft/s.
- Take the value in feet per second — for example 7.5 ft/s.
- Multiply by 1.09728 (the number of kilometers per hour in one foot per second).
- 7.5 × 1.09728 = 8.2296 km/h.
Quick mental estimate: Multiply the number of feet per second by 1.1 (within 0.2% of the exact answer).
Feet per second to Kilometers per hour conversion table
| Feet per second | Kilometers per hour |
|---|---|
| 1 ft/s | 1.09728 km/h |
| 5 ft/s | 5.4864 km/h |
| 10 ft/s | 10.9728 km/h |
| 20 ft/s | 21.9456 km/h |
| 25 ft/s | 27.432 km/h |
| 30 ft/s | 32.9184 km/h |
| 40 ft/s | 43.8912 km/h |
| 50 ft/s | 54.864 km/h |
| 60 ft/s | 65.8368 km/h |
| 70 ft/s | 76.8096 km/h |
| 80 ft/s | 87.7824 km/h |
| 100 ft/s | 109.728 km/h |
| 120 ft/s | 131.6736 km/h |
| Kilometers per hour | Feet per second |
|---|---|
| 1 km/h | 0.911344 ft/s |
| 5 km/h | 4.556722 ft/s |
| 10 km/h | 9.113444 ft/s |
| 20 km/h | 18.22689 ft/s |
| 25 km/h | 22.78361 ft/s |
| 30 km/h | 27.34033 ft/s |
| 40 km/h | 36.45378 ft/s |
| 50 km/h | 45.56722 ft/s |
| 60 km/h | 54.68066 ft/s |
| 70 km/h | 63.79411 ft/s |
| 80 km/h | 72.90755 ft/s |
| 100 km/h | 91.13444 ft/s |
| 120 km/h | 109.3613 ft/s |
About converting Feet per second to Kilometers per hour
Feet per second (ft/s) and Kilometers per hour (km/h) are both units of speed. The exact factor is 1 ft/s = 1.09728 km/h, so multiply by 1.09728 to go from feet per second to kilometers per hour (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Kilometers per hour to Feet per second converter, or the full unit converter for every unit at once.
Real-world speed in feet per second and kilometers per hour
| Example | Feet per second | Kilometers per hour |
|---|---|---|
| A walking pace | ≈ 4.593176 ft/s | ≈ 5.04 km/h |
| Usain Bolt's top speed (2009) | ≈ 40.74803 ft/s | ≈ 44.712 km/h |
| The UK motorway limit (70 mph) | 102.6667 ft/s | 112.6541 km/h |
| The German Autobahn advisory speed (130 km/h) | 118.4747 ft/s | 130 km/h |
| The speed of sound (air, 20 °C) | ≈ 1,125.328 ft/s | ≈ 1,234.8 km/h |
| An airliner at cruise | ≈ 820.21 ft/s | ≈ 900 km/h |
“≈” marks typical values; the rest are defined or measured figures.
The units
Feet per second — exactly 0.3048 m/s.
Used for: Ballistics, engineering and US sport analytics.
Kilometres per hour — exactly 1/3.6 m/s.
Used for: Road speeds in most countries.
km/h, mph, ft/s and knots are all defined exactly in metres per second (a knot is one nautical mile, exactly 1,852 m, per hour).