Convert Feet per second to Kilometres per hour
1 foot per second is 1.09728 km/h. One foot per second is exactly 1.09728 kilometres per hour.
One foot per second is 1.09728 kilometres per hour. To convert feet per second to kilometres per hour, multiply by 1.09728; to go the other way, divide by 1.09728 or multiply by 0.91134442. The factor is exact rather than rounded: it follows from NIST Special Publication 811. Exactly 0.3048 m/s.
Factor checked against the defining standard · How we check
- Feet per second × 1.09728
value * 1.097281.097 km/h
1 foot per second in every speed unit
| Unit | Value | Exact factor |
|---|---|---|
| metres per second | 0.3048 m/s | × 0.3048 |
| kilometres per hour | 1.09728 km/h | × 1.09728 |
| miles per hour | 0.6818181818 mph | × 0.681818181818 |
| knots | 0.5924838013 kn | × 0.592483801296 |
| feet per second (as entered) | 1 ft/s | — |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert feet per second to kilometres per hour?
- 1.Take the measurement in feet per second.
- 2.Multiply by 1.09728 — that is how many kilometres per hour fit in one foot per second.
- 3.To go back the other way, divide by 1.09728, or multiply by 0.91134442.
Feet per second to kilometres per hour conversion table
| Feet per second | Kilometres per hour |
|---|---|
| 1 ft/s | 1.09728 km/h |
| 2 ft/s | 2.19456 km/h |
| 3 ft/s | 3.29184 km/h |
| 4 ft/s | 4.38912 km/h |
| 5 ft/s | 5.4864 km/h |
| 6 ft/s | 6.58368 km/h |
| 7 ft/s | 7.68096 km/h |
| 8 ft/s | 8.77824 km/h |
| 9 ft/s | 9.87552 km/h |
| 10 ft/s | 10.9728 km/h |
| 12 ft/s | 13.16736 km/h |
| 15 ft/s | 16.4592 km/h |
| 20 ft/s | 21.9456 km/h |
| 25 ft/s | 27.432 km/h |
| 50 ft/s | 54.864 km/h |
| 100 ft/s | 109.728 km/h |
What are feet per second and kilometres per hour?
- Foot per second (ft/s)
- Exactly 0.3048 m/s. Muzzle velocities, falling objects and anything where a foot is the natural length.
- Kilometre per hour (km/h)
- Exactly one kilometre divided by 3,600 seconds. The road speed unit almost everywhere outside the United States and the United Kingdom.
Source: NIST Special Publication 811 — conversion factors for speed
Questions people actually ask
- How many kilometres per hour are in a foot per second?
- 1.09728. Exactly one kilometre divided by 3,600 seconds. The road speed unit almost everywhere outside the United States and the United Kingdom.
- How do I convert kilometres per hour back to feet per second?
- Divide by 1.09728, or multiply by 0.91134442 — they are the same operation.
Other speed conversions
Kilometres per hour to feet per second — the same conversion the other way.