Convert Foot-Pounds per Second to BTU per Minute
Convert Foot-Pounds per Second (ft⋅lbf/s) to BTU per Minute (BTU/min) instantly and accurately.
Conversion Formula
BTU/min = ft⋅lbf/s × 0.07710404781
About Foot-Pounds per Second
One foot-pound per second (ft·lbf/s) ≈ 1.3558 W - the natural power unit in the foot-pound-second (FPS) system. Since 1 mechanical horsepower = exactly 550 ft·lbf/s, the conversion 1 ft·lbf/s = 1/550 hp is exact. Used in FPS structural and fluid dynamics: beam deflection power, pump and turbine output, and ballistic energy-transfer calculations. 19th-century American industry rated waterwheel output in ft·lbf/s before horsepower standardisation. 1 ft·lbf/s = 1.35582 W.
About BTU per Minute
One BTU per minute (BTU/min) ≈ 17.58 W. Fire engineering uses BTU/min for heat release rate (HRR): a burning sofa releases 500-5,000 BTU/min; a flashover room fire 50,000-500,000 BTU/min. US commercial gas burners are rated 500-2,000 BTU/min. NFPA fire suppression standards use BTU/min to match sprinkler flow to HRR. Industrial furnace heating cycles also use this unit. 1 BTU/min = 17.584 W.
Quick Reference Table
| Foot-Pounds per Second (ft⋅lbf/s) | BTU per Minute (BTU/min) |
|---|---|
| 1 ft⋅lbf/s | 0.077104 BTU/min |
| 2 ft⋅lbf/s | 0.154208 BTU/min |
| 5 ft⋅lbf/s | 0.38552 BTU/min |
| 10 ft⋅lbf/s | 0.77104 BTU/min |
| 25 ft⋅lbf/s | 1.9276 BTU/min |
| 50 ft⋅lbf/s | 3.8552 BTU/min |
| 100 ft⋅lbf/s | 7.7104 BTU/min |