Convert BTU per Hour to Foot-Pounds per Second
Convert BTU per Hour (BTU/h) to Foot-Pounds per Second (ft⋅lbf/s) instantly and accurately.
Conversion Formula
ft⋅lbf/s = BTU/h × 0.2161581284
About BTU per Hour
One BTU per hour (BTU/h) ≈ 0.2931 W - the dominant HVAC capacity unit in the US and Canada. Room air conditioners are universally rated in BTU/h: 12,000 BTU/h = 1 ton of refrigeration = 3,517 W. Home furnaces range from 40,000-150,000 BTU/h. Office building cooling demand is calculated in BTU/h per ft². Engineers convert: BTU/h × 0.2931 = W; or W × 3.412 = BTU/h. 1 BTU/h = 0.29307 W.
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.
Quick Reference Table
| BTU per Hour (BTU/h) | Foot-Pounds per Second (ft⋅lbf/s) |
|---|---|
| 1 BTU/h | 0.216158 ft⋅lbf/s |
| 2 BTU/h | 0.432316 ft⋅lbf/s |
| 5 BTU/h | 1.08079 ft⋅lbf/s |
| 10 BTU/h | 2.16158 ft⋅lbf/s |
| 25 BTU/h | 5.40395 ft⋅lbf/s |
| 50 BTU/h | 10.8079 ft⋅lbf/s |
| 100 BTU/h | 21.6158 ft⋅lbf/s |