Velocity
ft/stomph
Convert feet per second (ft/s) to miles per hour (mph).
Factor1 ft/s = 0.6818182 mph
Converter
ft/s
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mph
Rendered to 6 significant figures.
Formula
Formula
mph = ft/s × 0.6818182
Multiply any value in feet per second by 0.6818182 to obtain the value in miles per hour.
Worked example
Convert 50 ft/s to mph.
- 01Start with 50 ft/s.
- 02Multiply by the conversion factor: 50 × 0.6818182 = 34.0909 mph.
Result50 ft/s = 34.0909 mph
Conversion table
| ft/s | mph |
|---|---|
| 1 | 0.68182 |
| 2 | 1.3636 |
| 5 | 3.4091 |
| 10 | 6.8182 |
| 20 | 13.636 |
| 50 | 34.091 |
| 100 | 68.182 |
| 200 | 136.36 |
| 500 | 340.91 |
| 1000 | 681.82 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ft/s to mph?
1 ft/s equals 0.6818182 mph. To convert, multiply the value in feet per second by 0.6818182.
How do I convert 1 ft/s to mph?
1 ft/s = 0.681818 mph. For any value, multiply by 0.6818182.
How do I convert mph back to ft/s?
Divide by the same factor — or equivalently, multiply by 1.466667. So 1 mph = 1.46667 ft/s.
When would I need to convert foot per second to mile per hour?
Velocity conversions are needed for fluid flow analysis (line velocity targets, erosional limits), gas-stream calculations, and equipment specs that mix m/s, ft/s and engineering speed units.
Is the conversion exact?
Yes. Both ft/s and mph are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).