Convert Inch-Pound-Force to Watt-Hours
Convert Inch-Pound-Force (in·lbf) to Watt-Hours (Wh) instantly and accurately.
Conversion Formula
Wh = in·lbf × 3.138467473e-5
About Inch-Pound-Force
An inch-pound-force (in·lbf) is the work done by one pound-force through one inch - exactly 0.11298482902761670 J (= 1/12 ft·lbf). It is the dominant torque unit for small fasteners and precision instruments in the US: a #6-32 screw in aluminium is torqued to 4-6 in·lbf; a dental implant abutment screw to ~25-30 Ncm (2.2-2.7 in·lbf). Hobby servo motor torque is quoted in oz·in (1 in·lbf = 16 oz·in). Bicycle stem bolts are typically 4-6 Nm (35-53 in·lbf). 1 in·lbf = 0.11298 J = 1/12 ft·lbf = 11.298 Ncm.
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.
Quick Reference Table
| Inch-Pound-Force (in·lbf) | Watt-Hours (Wh) |
|---|---|
| 1 in·lbf | 3.138 × 10-5 Wh |
| 2 in·lbf | 6.277 × 10-5 Wh |
| 5 in·lbf | 0.000156923 Wh |
| 10 in·lbf | 0.000313847 Wh |
| 25 in·lbf | 0.000784617 Wh |
| 50 in·lbf | 0.00156923 Wh |
| 100 in·lbf | 0.00313847 Wh |