Miles per hour to feet per second
1 mile per hour = 1.46667 feet per second
Type a value in miles per hour (mph) to get feet per second (ft/s) straight away. A mile per hour is larger than a foot per second, so the number goes up. Both units belong to speed, measured here against the meter per second.
1 mph = 1.4666667 ft/s
Formula
ft/s = mph × 1.4666667
One mile per hour is 1.4666667 feet per second, so multiply the mile per hour value by that factor. Here mph is the value in miles per hour and ft/s is the result in feet per second.
Worked example: 60 miles per hour × 1.4666667 = 88 feet per second.
Miles per hour to feet per second table
| miles per hour (mph) | feet per second (ft/s) |
|---|---|
| 1 mph | 1.46667 ft/s |
| 2 mph | 2.93333 ft/s |
| 3 mph | 4.4 ft/s |
| 4 mph | 5.86667 ft/s |
| 5 mph | 7.33333 ft/s |
| 6 mph | 8.8 ft/s |
| 7 mph | 10.2667 ft/s |
| 8 mph | 11.7333 ft/s |
| 9 mph | 13.2 ft/s |
| 10 mph | 14.6667 ft/s |
| 15 mph | 22 ft/s |
| 20 mph | 29.3333 ft/s |
| 25 mph | 36.6667 ft/s |
| 30 mph | 44 ft/s |
| 40 mph | 58.6667 ft/s |
| 50 mph | 73.3333 ft/s |
| 60 mph | 88 ft/s |
| 75 mph | 110 ft/s |
| 100 mph | 146.667 ft/s |
Everyday miles per hour in feet per second
| What it is | mph | ft/s |
|---|---|---|
| walking pace | 3 mph | 4.4 ft/s |
| a 20 mph zone | 20 mph | 29.3333 ft/s |
| a UK town limit | 30 mph | 44 ft/s |
| a UK single-carriageway limit | 60 mph | 88 ft/s |
| a UK motorway limit | 70 mph | 102.667 ft/s |
Quick estimate in your head
Multiply by about 1.5. For 60 mph that gives 90 ft/s against an exact 88 ft/s, an error of 2.3%.
About the units
Mile per hour (mph). Exactly 0.44704 m/s. Used for road speeds in the US and UK.
Foot per second (ft/s). Exactly 0.3048 m/s. Used for projectile and fluid speeds in the US.
Going the other way, 1 foot per second is 0.681818 miles per hour.
Questions
How many feet per second are in 1 mile per hour?
1 mile per hour is 1.46667 feet per second, and 1 foot per second is 0.681818 miles per hour.
How do I convert miles per hour to feet per second?
Use ft/s = mph × 1.4666667. For example, 60 miles per hour × 1.4666667 = 88 feet per second.
Is the mile per hour to foot per second factor exact?
The factor comes from the unit definitions. Results here are rounded to 6 significant digits for display.
How much is a UK motorway limit in feet per second?
70 mph is 102.667 ft/s.
Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).
Related conversions
- feet per second to miles per hour
- miles per hour to kilometers per hour
- miles per hour to meters per second
- miles per hour to knots
- feet per second to meters per second
- meters per second to feet per second