Seconds to feet per second (exhaust velocity)
Type a value in s to get it in ft/s instantly.
11,260.92ft/s
That's 1.01× as efficient as a Merlin vacuum engine, while a Space Shuttle main engine in vacuum is 1.29× more efficient. Its exhaust leaves at about 3.432 km/s.
What it means
How efficient is that engine?
Rocket figures are typical published values, at sea level unless marked vacuum. The jet-engine figure is for an airliner at cruise.
The math
How to convert s to ft/s
To convert seconds to feet per second (exhaust velocity), multiply by 32.174.
Example: 350 s × 32.174 = 11,260.9 ft/s.
In the other direction, 1 ft/s = 0.031081 s.
Every unit
Your specific impulse in every unit
Tables
s to ft/s conversion table
| s | ft/s |
|---|---|
| 200 s | 6,434.81 ft/s |
| 250 s | 8,043.51 ft/s |
| 282 s | 9,073.08 ft/s |
| 300 s | 9,652.21 ft/s |
| 350 s | 11,260.9 ft/s |
| 380 s | 12,226.1 ft/s |
| 450 s | 14,478.3 ft/s |
| 900 s | 28,956.6 ft/s |
| 1,600 s | 51,478.5 ft/s |
| 3,000 s | 96,522.1 ft/s |
ft/s to s conversion table
| ft/s | s |
|---|---|
| 200 ft/s | 6.21619 s |
| 250 ft/s | 7.77024 s |
| 282 ft/s | 8.76483 s |
| 300 ft/s | 9.32429 s |
| 350 ft/s | 10.8783 s |
| 380 ft/s | 11.8108 s |
| 450 ft/s | 13.9864 s |
| 900 ft/s | 27.9729 s |
| 1,600 ft/s | 49.7295 s |
| 3,000 ft/s | 93.2429 s |
Quick answers
Quick answers
- How many ft/s is 1 s?
- 1 s is 32.174 ft/s.
- How many ft/s is 10 s?
- 10 s is 321.74 ft/s.
- How many ft/s is 350 s?
- 350 s is 11,260.9 ft/s.
The units
About these units
Seconds (s)
The usual rocketry figure, the same in every unit system.
Feet per second (exhaust velocity) (ft/s)
The US form of exhaust velocity.
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