Feet Per Second to Miles Per Hour
Feet per second is used in the US to describe projectile velocity, such as bullet or arrow speed. Miles per hour is the standard speed unit on road signs and speedometers in the US and UK. 1 ft/s equals ≈0.681818 mph, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to speed, measured here against speed's base unit (m/s) — every other speed unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
mph = ft/s × ≈0.681818
ft/s = mph × ≈1.46667
Worked example: 5 ft/s × ≈0.681818 = ≈3.40909 mph.
Conversion table
| Foot per second (ft/s) | Mile per hour (mph) |
|---|---|
| 1 ft/s | ≈0.681818 mph |
| 2 ft/s | ≈1.36364 mph |
| 3 ft/s | ≈2.04545 mph |
| 5 ft/s | ≈3.40909 mph |
| 10 ft/s | ≈6.81818 mph |
| 20 ft/s | ≈13.6364 mph |
| 25 ft/s | ≈17.0455 mph |
| 50 ft/s | ≈34.0909 mph |
| 100 ft/s | ≈68.1818 mph |
| 250 ft/s | ≈170.455 mph |
| 500 ft/s | ≈340.909 mph |
| 1,000 ft/s | ≈681.818 mph |
Frequently asked
- How many Miles per hour in a foot per second?
- 1 ft/s equals ≈0.681818 mph.
- How do I convert Feet per second to Miles per hour?
- Multiply the value in ft/s by ≈0.681818 to get mph. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Foot per second and Mile per hour are both defined by a fixed conversion factor to speed's base unit (m/s), so the result shown is exact to the precision displayed, not an approximation.