Convert Inch-Pound-Force to Therms
Convert Inch-Pound-Force (in·lbf) to Therms (thm) instantly and accurately.
Conversion Formula
thm = in·lbf × 1.070889553e-9
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 Therms
A therm is the US natural gas billing unit equal to exactly 100,000 BTU = 105,505,585.262 J ≈ 105.5 MJ. One CCF of average US pipeline gas contains ~1.02 therms. The EIA publishes residential gas prices in $/therm; spot prices at Henry Hub are in $/MMBTU (1 MMBTU = 10 therms). US households average 500-700 therms/year for space heating, water heating, and cooking. A 15 kW domestic boiler running 2 hours delivers ~1 therm of useful heat. 1 therm = 100,000 BTU = 105.506 MJ = 29.307 kWh = 25,200 kcal.
Quick Reference Table
| Inch-Pound-Force (in·lbf) | Therms (thm) |
|---|---|
| 1 in·lbf | 1.071 × 10-9 thm |
| 2 in·lbf | 2.142 × 10-9 thm |
| 5 in·lbf | 5.354 × 10-9 thm |
| 10 in·lbf | 1.071 × 10-8 thm |
| 25 in·lbf | 2.677 × 10-8 thm |
| 50 in·lbf | 5.354 × 10-8 thm |
| 100 in·lbf | 1.071 × 10-7 thm |