Convert Miles per hour to Feet per second
1 mile per hour is 1.466667 ft/s. One mile per hour is exactly 1.46666666667 feet per second.
One mile per hour is 1.4666667 feet per second. To convert miles per hour to feet per second, multiply by 1.4666667; to go the other way, divide by 1.4666667 or multiply by 0.68181818. The factor is exact rather than rounded: it follows from NIST Special Publication 811. Exactly 0.44704 m/s, because a mile is exactly 1,609.344 metres.
Factor checked against the defining standard · How we check
- Miles per hour × 1.4666667
value * 1.466666666671.467 ft/s
1 mile per hour in every speed unit
| Unit | Value | Exact factor |
|---|---|---|
| metres per second | 0.44704 m/s | × 0.44704 |
| kilometres per hour | 1.609344 km/h | × 1.609344 |
| miles per hour (as entered) | 1 mph | — |
| knots | 0.8689762419 kn | × 0.868976241901 |
| feet per second | 1.466666667 ft/s | × 1.46666666667 |
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 miles per hour to feet per second?
- 1.Take the measurement in miles per hour.
- 2.Multiply by 1.4666667 — that is how many feet per second fit in one mile per hour.
- 3.To go back the other way, divide by 1.4666667, or multiply by 0.68181818.
Miles per hour to feet per second conversion table
| Miles per hour | Feet per second |
|---|---|
| 1 mph | 1.466667 ft/s |
| 2 mph | 2.933333 ft/s |
| 3 mph | 4.4 ft/s |
| 4 mph | 5.866667 ft/s |
| 5 mph | 7.333333 ft/s |
| 6 mph | 8.8 ft/s |
| 7 mph | 10.266667 ft/s |
| 8 mph | 11.733333 ft/s |
| 9 mph | 13.2 ft/s |
| 10 mph | 14.666667 ft/s |
| 12 mph | 17.6 ft/s |
| 15 mph | 22 ft/s |
| 20 mph | 29.333333 ft/s |
| 25 mph | 36.666667 ft/s |
| 50 mph | 73.333333 ft/s |
| 100 mph | 146.666667 ft/s |
What are miles per hour and feet per second?
- Mile per hour (mph)
- Exactly 0.44704 m/s, because a mile is exactly 1,609.344 metres. US and UK road speeds.
- Foot per second (ft/s)
- Exactly 0.3048 m/s. Muzzle velocities, falling objects and anything where a foot is the natural length.
Source: NIST Special Publication 811 — conversion factors for speed
Questions people actually ask
- How many feet per second are in a mile per hour?
- 1.4666667. Exactly 0.3048 m/s. Muzzle velocities, falling objects and anything where a foot is the natural length.
- How do I convert feet per second back to miles per hour?
- Divide by 1.4666667, or multiply by 0.68181818 — they are the same operation.
Other speed conversions
Feet per second to miles per hour — the same conversion the other way.