Convert Watt-Hours to Foot-Pound-Force
Convert Watt-Hours (Wh) to Foot-Pound-Force (ft·lbf) instantly and accurately.
Conversion Formula
ft·lbf = Wh × 2655.223737
About Watt-Hours
A watt-hour (Wh) is the energy delivered by 1 watt for one hour - exactly 3,600 J. It is the practical unit for small-scale electrical energy: a 10,000 mAh 5 V power bank stores 50 Wh; a laptop battery holds 50-90 Wh; a smartphone battery holds 10-15 Wh; an AA alkaline cell stores ~3 Wh. LED lamps labelled 9 W save 51 Wh/h over a 60 W incandescent. IATA dangerous-goods rules use Wh as the threshold for lithium batteries in aircraft: cells >20 Wh and batteries >100 Wh need special approval. 1 Wh = 3,600 J = 3.412 BTU.
About Foot-Pound-Force
A foot-pound-force (ft·lbf) is the work done by one pound-force through one foot - exactly 1.3558179483314004 J. It is the standard torque and energy unit in US engineering. Automotive engine torque: Honda Civic ~125 lb-ft; Ford F-150 EcoBoost ~500 lb-ft. Muzzle energies: .22 LR ~140 ft·lbf; .308 Winchester ~2,600 ft·lbf; .50 BMG ~14,000 ft·lbf. Diesel pile hammers deliver 15,000-600,000 ft·lbf/blow. SAE Grade 8 bolts are specified at 7-950 ft·lbf. 1 ft·lbf = 12 in·lbf = 1.35582 J = 0.32405 cal.
Quick Reference Table
| Watt-Hours (Wh) | Foot-Pound-Force (ft·lbf) |
|---|---|
| 1 Wh | 2655.22 ft·lbf |
| 2 Wh | 5310.45 ft·lbf |
| 5 Wh | 13276.1 ft·lbf |
| 10 Wh | 26552.2 ft·lbf |
| 25 Wh | 66380.6 ft·lbf |
| 50 Wh | 132761 ft·lbf |
| 100 Wh | 265522 ft·lbf |