US therm used for natural gas energy.
US therms to Foot-pounds Converter — therm to ft-lb
Convert US therm (therm) to Foot-pound (ft-lb) using the exact conversion factor (1 us therm = 77,798,350.53 foot-pound). See the formula, worked examples, and conversion table.
US therms to Foot-pounds converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Work from one pound-force over one foot.
Result = input x 1.054804e+8 / 1.355817948.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting US therms to Foot-pounds
US therm and Foot-pound both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: US therm used for natural gas energy, and work from one pound-force over one foot.
Formula
foot-pounds = us therms × 77798350.5306
This factor comes from each unit's defined relationship to the category's base unit: 1 us therm equals 105480400 base units, and 1 foot-pound equals 1.35581794833 base units, so dividing one by the other gives the direct us therm-to-foot-pound factor of 77798350.5306.
Simple example
1 therm × 77798350.53 = 77,798,350.53 ft-lb
1 us therm = 77,798,350.53 foot-pounds.
Real-world example
100 therm × 77798350.53 = 7,779,835,053 ft-lb
100 us therms = 7,779,835,053 foot-pounds.
Conversion table
| US therm (therm) | Foot-pound (ft-lb) |
|---|---|
| 1 therm | 77,798,350.53 ft-lb |
| 10 therm | 777,983,505.3 ft-lb |
| 100 therm | 7,779,835,053 ft-lb |
| 500 therm | 38,899,175,270 ft-lb |
| 1,000 therm | 77,798,350,530 ft-lb |
| 2,000 therm | 155,596,701,100 ft-lb |
Reverse conversion: Foot-pound to US therm
1 ft-lb × 1.285374e-8 = 1.285374e-8 therm
1 foot-pound = 1.285374e-8 us therms.
us therms = foot-pounds × 1.285374e-8
For a page dedicated to this direction, see Foot-pound to US therm.
Understanding the US therm (therm)
US therm used for natural gas energy.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many foot-pounds are in 1 us therm?
1 us therm equals 77,798,350.53 foot-pounds, using the exact defined conversion factor rather than an estimate.
How do I convert us therm to foot-pound?
Multiply the us therm value by 77798350.53. The converter above does this instantly to whatever precision you set.
How do I convert foot-pound back to us therm?
Use the reverse factor: 1 foot-pound equals 1.285374e-8 us therms. You can also use the swap control in the converter above to flip the direction instantly.
What is a us therm?
US therm (therm) is a unit of energy.
What is a foot-pound?
Foot-pound (ft-lb) is a unit of energy.
Is the us therm to foot-pound conversion exact?
Yes. Both us therm and foot-pound are defined by fixed standards rather than physical artifacts, so the factor of 77798350.53 used above is exact to as many digits as you choose to display.