Pounds of fuel per pound-force per hour to seconds
Type a value in lb/(lbf·h) to get it in s instantly.
10.29s
Nothing on our list is smaller: a solid rocket booster is 24× more efficient. Its exhaust leaves at about 0.1009 km/s.
Convert the other way: s to lb/(lbf·h)
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 lb/(lbf·h) to s
Effective exhaust velocity is Isp × 9.80665. Thrust-specific fuel consumption in lb/(lbf·h) is 3,600 ÷ Isp.
Example: 350 lb/(lbf·h) = 10.2857 s.
Every unit
Your specific impulse in every unit
Tables
lb/(lbf·h) to s conversion table
| lb/(lbf·h) | s |
|---|---|
| 200 lb/(lbf·h) | 18 s |
| 250 lb/(lbf·h) | 14.4 s |
| 282 lb/(lbf·h) | 12.766 s |
| 300 lb/(lbf·h) | 12 s |
| 350 lb/(lbf·h) | 10.2857 s |
| 380 lb/(lbf·h) | 9.47368 s |
| 450 lb/(lbf·h) | 8 s |
| 900 lb/(lbf·h) | 4 s |
| 1,600 lb/(lbf·h) | 2.25 s |
| 3,000 lb/(lbf·h) | 1.2 s |
s to lb/(lbf·h) conversion table
| s | lb/(lbf·h) |
|---|---|
| 200 s | 18 lb/(lbf·h) |
| 250 s | 14.4 lb/(lbf·h) |
| 282 s | 12.766 lb/(lbf·h) |
| 300 s | 12 lb/(lbf·h) |
| 350 s | 10.2857 lb/(lbf·h) |
| 380 s | 9.47368 lb/(lbf·h) |
| 450 s | 8 lb/(lbf·h) |
| 900 s | 4 lb/(lbf·h) |
| 1,600 s | 2.25 lb/(lbf·h) |
| 3,000 s | 1.2 lb/(lbf·h) |
Quick answers
Quick answers
- How many s is 1 lb/(lbf·h)?
- 1 lb/(lbf·h) is 3,600 s.
- How many s is 10 lb/(lbf·h)?
- 10 lb/(lbf·h) is 360 s.
- How many s is 350 lb/(lbf·h)?
- 350 lb/(lbf·h) is 10.2857 s.
The units
About these units
Pounds of fuel per pound-force per hour (lb/(lbf·h))
Jet-engine fuel consumption, the inverse of specific impulse. Lower is better.
Seconds (s)
The usual rocketry figure, the same in every unit system.
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