Foot-Pounds (ft·lbf) to Therms (US) Converter
Enter a value to instantly convert between energy units.
1 Foot-Pound Force = 1.2854e-8 Therm (US)
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
therms = ft·lbf × 1.2851×10⁻⁸The foot-pound is a small imperial mechanical unit; the therm is 100,000 BTU — a large unit used in natural gas. Since 1 therm = 77.82 million ft·lbf, a single ft·lbf is about 1.285×10⁻⁸ therms. Energy auditors and mechanical engineers use this when comparing small mechanical works to bulk gas energy.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
An energy analyst converting 1 million ft·lbf pump work to therms for gas equivalence reporting.
1000000 ft·lbf = 0.01285 thm
A mechanical engineer calculating 10 million ft·lbf compressor work in therms for utility reporting.
10000000 ft·lbf = 0.1285 thm
An auditor converting 50 million ft·lbf industrial motor work to therms for efficiency analysis.
50000000 ft·lbf = 0.6425 thm
A facilities manager checking 100 million ft·lbf annual mechanical work as about 1.3 therms equivalent.
100000000 ft·lbf = 1.285 thm