Feet to impact speed in mph
Type a value in ft to get it in mph instantly.
70.04mph
That's 5× as high as a 10 m diving board, while Niagara Falls is 1.02× higher. Without air it falls in 3.193 s and hits at 112.7 km/h (70.04 mph).
What it means
How high is that drop?
In a vacuum on Earth (g = 9.80665 m/s²). Air resistance matters for long falls: a skydiver tops out near 200 km/h.
The math
How to convert ft to mph
t = √(2h ÷ g), v = √(2 g h), with g = 9.80665 m/s²; h = ½ g t².
Example: 164 ft = 70.042 mph.
Every unit
That fall in every unit
Tables
ft to mph conversion table
| ft | mph |
|---|---|
| 1.64 ft | 7.0042 mph |
| 3.28 ft | 9.90543 mph |
| 6.56 ft | 14.0084 mph |
| 16.4 ft | 22.1492 mph |
| 32.8 ft | 31.3237 mph |
| 65.6 ft | 44.2984 mph |
| 98.4 ft | 54.2543 mph |
| 164 ft | 70.042 mph |
| 328 ft | 99.0543 mph |
| 656 ft | 140.084 mph |
| 984 ft | 171.567 mph |
| 1,640 ft | 221.492 mph |
mph to ft conversion table
| mph | ft |
|---|---|
| 7.01 mph | 1.64272 ft |
| 9.91 mph | 3.28303 ft |
| 14 mph | 6.55214 ft |
| 22.2 mph | 16.4753 ft |
| 31.3 mph | 32.7503 ft |
| 44.3 mph | 65.6046 ft |
| 54.3 mph | 98.5659 ft |
| 70.1 mph | 164.272 ft |
| 99.1 mph | 328.303 ft |
| 140 mph | 655.214 ft |
| 172 mph | 988.972 ft |
| 222 mph | 1,647.53 ft |
Quick answers
Quick answers
- How many mph is 1 ft?
- 1 ft is 5.46936 mph.
- How many mph is 10 ft?
- 10 ft is 17.2956 mph.
- How many mph is 164 ft?
- 164 ft is 70.042 mph.
The units
About these units
Feet (ft)
Height fallen in feet.
Impact speed in mph (mph)
Speed at the bottom in mph.
Keep going