Convert BTU per Second to Foot-Pounds per Minute
Convert BTU per Second (BTU/s) to Foot-Pounds per Minute (ft⋅lbf/min) instantly and accurately.
Conversion Formula
ft⋅lbf/min = BTU/s × 46690.15574
About BTU per Second
One BTU per second (BTU/s) ≈ 1,055 W - close to 1 kW but slightly larger. Used when heat rates are so high that per-hour or per-minute numbers become unwieldy. In fire protection engineering, large house fires peak at 500-2,000 BTU/s; industrial fires at millions of BTU/s. Blast characterisation for petrochemical safety and large industrial heat exchangers with duties of millions of BTU/h are conveniently expressed in BTU/s. Since 1 BTU/s ≈ 1.055 kW, conversion to SI is straightforward. 1 BTU/s = 1,055.056 W.
About Foot-Pounds per Minute
One foot-pound per minute (ft·lbf/min) ≈ 0.02260 W. Its historical importance is large: James Watt rated mill horses at ~33,000 ft·lbf/min sustained output and defined 1 mechanical horsepower as exactly 33,000 ft·lbf/min (= 550 ft·lbf/s). The unit is still used for machine-tool power, hydraulic pump output, and low-speed actuator performance in US customary calculations: torque (ft·lbf) × RPM = power in ft·lbf/min. 1 hp = 33,000 ft·lbf/min.
Quick Reference Table
| BTU per Second (BTU/s) | Foot-Pounds per Minute (ft⋅lbf/min) |
|---|---|
| 1 BTU/s | 46690.2 ft⋅lbf/min |
| 2 BTU/s | 93380.3 ft⋅lbf/min |
| 5 BTU/s | 233451 ft⋅lbf/min |
| 10 BTU/s | 466902 ft⋅lbf/min |
| 25 BTU/s | 1167250 ft⋅lbf/min |
| 50 BTU/s | 2334510 ft⋅lbf/min |
| 100 BTU/s | 4669020 ft⋅lbf/min |