Convert Feet per Second to Miles per Hour
ft/s to mph · speed conversion
What are feet per second and miles per hour?
Feet per second is an imperial speed unit used in ballistics and some engineering. Miles per hour is the standard speed unit for roads in the US and UK. For reference: a brisk walk is about 5 km/h (3 mph), and highway speed is around 100 km/h (62 mph).
How to convert feet per second to miles per hour
1 ft/s = 0.681818 mph. To convert, multiply the number of feet per second by 0.681818. For example, 5 ft/s = 3.40909 mph, and 20 ft/s = 13.6364 mph. To go the other way, multiply miles per hour by 1.46667 (since 1 mph = 1.46667 ft/s).
Feet per Second to Miles per Hour conversion table
| Feet per Second (ft/s) | Miles per Hour (mph) |
|---|---|
| 1 | 0.681818 |
| 5 | 3.40909 |
| 10 | 6.81818 |
| 30 | 20.4545 |
| 60 | 40.9091 |
| 100 | 68.1818 |
| 120 | 81.8182 |
FAQ
What is 1 ft/s in mph?
1 ft/s = 0.681818 mph. To convert any amount, multiply the number of feet per second by 0.681818.
How do I convert miles per hour back to feet per second?
Go the other way: 1 mph = 1.46667 ft/s, so multiply miles per hour by 1.46667 to get feet per second.
Is a feet per second bigger than a miles per hour?
No — 1 ft/s is the smaller unit, equal to 0.681818 mph (it takes 1.46667 ft/s to make one mph).
Are these speed conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.