Convert energy units — joules, kilowatt-hours, calories, BTU, electron volts and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 therm | 77798.2 ft·lb | |
| 0.01 therm | 777982 ft·lb | |
| 0.1 therm | 7.77982e+06 ft·lb | |
| 1 therm | 7.77982e+07 ft·lb | |
| 5 therm | 3.88991e+08 ft·lb | |
| 10 therm | 7.77982e+08 ft·lb | |
| 50 therm | 3.88991e+09 ft·lb | |
| 100 therm | 7.77982e+09 ft·lb | |
| 1000 therm | 7.77982e+10 ft·lb |
Formula: Foot-Pound = Therm × 7.78e+07
Multiply any therm value by 7.78e+07 to get foot-pound.
Reverse: Therm = Foot-Pound × 1.2854e-8
Common therm values — factor: 1 therm = 7.78e+07 ft·lb
| Therm (therm) | Foot-Pound (ft·lb) | Context |
|---|---|---|
| 0.001 therm | 7.78e+04 ft·lb | 0.1 kWh |
| 0.01 therm | 7.78e+05 ft·lb | 1 kWh |
| 0.1 therm | 7.78e+06 ft·lb | 3 kWh |
| 1 therm | 7.78e+07 ft·lb | 29.3 kWh |
| 10 therm | 7.78e+08 ft·lb | Monthly gas fraction |
| 50 therm | 3.890e+09 ft·lb | Half winter month |
| 100 therm | 7.780e+09 ft·lb | Monthly winter gas |
| 500 therm | 3.890e+10 ft·lb | Seasonal heating |
| 1,000 therm | 7.780e+10 ft·lb | Annual home gas |
| 1e+04 therm | 7.780e+11 ft·lb | Commercial building |
| 1e+05 therm | 7.780e+12 ft·lb | Large industrial |
| 1e+06 therm | 7.780e+13 ft·lb | Utility scale |
| 1.000e+09 therm | 7.780e+16 ft·lb | Regional supply |
| 1.000e+12 therm | 7.780e+19 ft·lb | National supply |
| 1.000e+15 therm | 7.780e+22 ft·lb | Global scale |
1 therm = 7.78e+07 ft·lb. Memorize for instant estimates.
Use 7.78e+07 as a quick mental multiplier.
Multiply result by 1.2854e-8 to recover the original therm value.
Bills residential and commercial customers in therms per billing cycle.
Calculates annual gas consumption for boilers and furnaces in therms.
Trades natural gas contracts denominated in therms or MMBTU.
Monitors and benchmarks gas use in therms per square foot per year.
Sizes gas pipes and appliances based on BTU/hour and therm ratings.
Models household and industrial gas demand in therms per year.
The therm is a unit of natural gas energy equal to 100,000 BTU (105,480,400 joules). It is the standard billing unit for natural gas in the United States and United Kingdom. The name comes from the Greek thermos (heat).
Gas utilities bill residential and commercial customers in therms in the US and UK. A typical US household uses about 50–100 therms per month in winter. Natural gas furnaces and water heaters are rated in therms per hour.
Interesting fact: One therm of natural gas costs about $1.00–$2.00 in the US. Burning one therm releases about 5.3 kg of CO₂. The US consumes about 28 trillion therms of natural gas equivalent energy per year.
The foot-pound (ft·lb) is an Imperial unit of energy equal to the work done when a force of one pound-force moves an object one foot, equaling 1.35582 joules. It has been used in British and American engineering since the 18th century.
Foot-pounds are standard in US mechanical engineering for torque specifications, engine output (often ft·lb of torque), and ballistic energy measurements. Rifle bullet energies are commonly quoted in foot-pounds in American publications.
Interesting fact: A typical 9mm pistol bullet has about 350 ft·lb of muzzle energy. The torque specification for tightening a car wheel bolt is typically 80–100 ft·lb. One horsepower equals 550 ft·lb per second.
Converting therm to foot-pound is common across energy, nutrition, engineering, and science. Different sectors use different energy units — joules in physics, kcal in nutrition, kWh in electricity, and BTU in HVAC — making accurate conversion essential for cross-disciplinary work and international comparisons.
Quick reference: 5 therm = 3.89e+08 ft·lb and 10 therm = 7.78e+08 ft·lb. Reverse: 1 ft·lb = 1.2854e-8 therm. Exact factor: 1 therm = 7.78e+07 ft·lb.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.