The foot per second
The foot per second (ft/s, fps) equals exactly 0.3048 m/s. It is common in US ballistics (muzzle velocity), engineering (fluid flow, elevator speed), and physics classrooms as an imperial alternative to mph.
Feet per second to Miles per hour Converter
1 ft/s = 0.681818 mph (foot per second → mile per hour)
1 ft/s = 0.681818 mph
1 foot per second equals 0.681818 miles per hour. To convert feet per second to miles per hour, multiply the foot per second value by 0.681818. For quick reference: 1 ft/s = 0.681818 mph, 5 ft/s = 3.40909 mph, 10 ft/s = 6.81818 mph, 100 ft/s = 68.1818 mph.
Formula
Miles per hour = Feet per second × 0.681818Quick
How to convert feet per second to miles per hour
Take your value
Start with your value in feet per second.
Multiply by 0.681818
Multiply the foot per second value by 0.681818. This is the exact conversion factor from feet per second to miles per hour.
Read the result
The product is your value in miles per hour. For example, 5 ft/s × 0.681818 = 3.40909 mph.
Conversion formula
The exact factor from feet per second to miles per hour is 0.681818.
Miles per hour = Feet per second × 0.681818
Feet per second to Miles per hour conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Feet per second (ft/s) | Miles per hour (mph) |
|---|---|
| 1 ft/s | 0.68182 mph |
| 2 ft/s | 1.3636 mph |
| 3 ft/s | 2.0455 mph |
| 4 ft/s | 2.7273 mph |
| 5 ft/s | 3.4091 mph |
| 6 ft/s | 4.0909 mph |
| 7 ft/s | 4.7727 mph |
| 8 ft/s | 5.4545 mph |
| 9 ft/s | 6.1364 mph |
| 10 ft/s | 6.8182 mph |
| 12 ft/s | 8.1818 mph |
| 15 ft/s | 10.227 mph |
| 18 ft/s | 12.273 mph |
| 20 ft/s | 13.636 mph |
| 22 ft/s | 15 mph |
| 25 ft/s | 17.045 mph |
| 28 ft/s | 19.091 mph |
| 30 ft/s | 20.455 mph |
| 32 ft/s | 21.818 mph |
| 35 ft/s | 23.864 mph |
| 40 ft/s | 27.273 mph |
| 45 ft/s | 30.682 mph |
| 50 ft/s | 34.091 mph |
| 55 ft/s | 37.5 mph |
| 60 ft/s | 40.909 mph |
| 65 ft/s | 44.318 mph |
| 70 ft/s | 47.727 mph |
| 75 ft/s | 51.136 mph |
| 80 ft/s | 54.545 mph |
| 85 ft/s | 57.955 mph |
| 90 ft/s | 61.364 mph |
| 95 ft/s | 64.773 mph |
| 100 ft/s | 68.182 mph |
| 110 ft/s | 75 mph |
| 120 ft/s | 81.818 mph |
| 130 ft/s | 88.636 mph |
| 140 ft/s | 95.455 mph |
| 150 ft/s | 102.27 mph |
| 160 ft/s | 109.09 mph |
| 180 ft/s | 122.73 mph |
| 200 ft/s | 136.36 mph |
| 220 ft/s | 150 mph |
| 250 ft/s | 170.45 mph |
| 280 ft/s | 190.91 mph |
| 300 ft/s | 204.55 mph |
| 350 ft/s | 238.64 mph |
| 400 ft/s | 272.73 mph |
| 500 ft/s | 340.91 mph |
| 700 ft/s | 477.27 mph |
| 1000 ft/s | 681.82 mph |
Real-world reference
A typical handgun muzzle velocity is 800–1,200 ft/s. A falling object reaches about 32 ft/s after one second. In miles per hour, that gives you: 1 ft/s = 0.681818 mph, 10 ft/s = 6.81818 mph, 100 ft/s = 68.1818 mph.
Frequently asked questions
- How many miles per hour are in 1 foot per second?
- 1 foot per second equals 0.681818 miles per hour.
- How do I convert feet per second to miles per hour?
- Multiply the foot per second value by 0.681818. So x ft/s × 0.681818 = the equivalent in mph.
- What is 5 feet per second in miles per hour?
- 5 feet per second equals 3.40909 miles per hour.
- What is 10 feet per second in miles per hour?
- 10 feet per second equals 6.81818 miles per hour.
- What is 100 feet per second in miles per hour?
- 100 feet per second equals 68.1818 miles per hour.
- How do I convert back from miles per hour to feet per second?
- Multiply the mile per hour value by 1.46667. For example, 1 mph = 1.46667 ft/s.
- Is the foot per second bigger than the mile per hour?
- No. 1 foot per second is smaller than 1 mile per hour. It takes 1.46667 feet per second to equal 1 mile per hour.
- Are these conversion factors exact?
- The underlying imperial/US unit definitions are exact; the displayed factor (0.681818) is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.
About the foot per second and the mile per hour
The mile per hour
The mile per hour (mph) is the customary speed unit in the United States and the United Kingdom. The conversion 1 mph = 0.44704 m/s is exact, derived from 1 mile = 1609.344 m. A useful mental shortcut: multiply mph by 1.6 to get a close km/h estimate.