Convert Miles per Hour to Feet per Second (mph to ft/s)
1 mile per hour (mph) = 1.466666667 feet per second (ft/s). 1 ft/s = 0.6818181818 mph. Example: 15 mph = 15 × 1.466666667 = 22 ft/s.
Also searched as miles per hour to ft/s, miles per hour in ft/s, miles per hour into feet per second, mph to ft/s, mph in feet per second, mph into foot per second, mile per hour to foot per second, mph to feet per second converter and how many feet per second in a mile per hour.
1 mph = 1.466666667 ft/s
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk mile per hour to foot per second converter to paste a column from Excel.
How to Convert Mile per Hour to Foot per Second
- 1 mph = 1.466666667 ft/s
- 1 ft/s = 0.6818181818 mph
- Example: convert 15 mph to ft/s: 15 mph = 15 × 1.466666667 ft/s = 22 ft/s
Formula
ft/s = mph × 1.466666666667
Derivation from SI units:
- 1 mph = 1609.344 m ÷ 3600 s = 0.44704 m/s exactly.
- 1 ft/s = 0.3048 m/s exactly.
- 1 mph = 0.44704 m/s ÷ 0.3048 m/s per ft/s = 1.466666666667 ft/s
Both units are defined exactly, so the factor is exact. Mile per Hour definition: mile per hour; Foot per Second definition: foot per second.
Worked examples
- A reading of 30 mph converts to 44 ft/s.
30 mph × 1.466666667 = 44 ft/s - A value of 60 mph is 88 ft/s.
60 mph × 1.466666667 = 88 ft/s
Mile per Hour to Foot per Second conversion table
| Miles per Hour (mph) | Feet per Second (ft/s) |
|---|---|
| 5 mph | 7.333333333 ft/s |
| 10 mph | 14.66666667 ft/s |
| 20 mph | 29.33333333 ft/s |
| 25 mph | 36.66666667 ft/s |
| 30 mph | 44 ft/s |
| 40 mph | 58.66666667 ft/s |
| 50 mph | 73.33333333 ft/s |
| 55 mph | 80.66666667 ft/s |
| 60 mph | 88 ft/s |
| 65 mph | 95.33333333 ft/s |
| 70 mph | 102.6666667 ft/s |
| 75 mph | 110 ft/s |
Where it's used
Miles per Hour are used for US and UK speed limits, while feet per second appear in muzzle velocity and ballistics. Both measure speed (distance per time), so the conversion is a fixed factor.
Mile per Hour to other speed units
| Conversion | 1 mph equals |
|---|---|
| mile per hour to foot per second | 1.466666667 ft/s |
| mile per hour to meter per second | 0.44704 m/s |
| mile per hour to kilometer per hour | 1.609344 km/h |
| mile per hour to knot | 0.8689762419 kn |
Frequently asked questions
How many feet per second are in 1 mile per hour?
1 mph = 1.466666667 ft/s.
How do I convert miles per hour to feet per second?
Multiply the value in mph by 1.466666667. For example, 15 mph × 1.466666667 = 22 ft/s.
Is the mph to ft/s conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "mile per hour".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot per second".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Miles per Hour to Feet per Second (mph to ft/s). Retrieved October 25, 2026, from https://scientificconverters.com/speed/miles-per-hour-to-feet-per-second/
IEEE
Scientific Converters, "Convert Miles per Hour to Feet per Second (mph to ft/s)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/speed/miles-per-hour-to-feet-per-second/