Convert foot-pound to British thermal unit
1 ft⋅lb = 0.001285067463 BTU
1 ft⋅lb = 0.00129 BTU
1 ft⋅lb in every energy unit
| joule | 1.36 J |
| kilojoule | 0.00136 kJ |
| megajoule | 0.00000136 MJ |
| calorie | 0.324 cal |
| kilocalorie | 0.000324 kcal |
| watt-hour | 0.000377 Wh |
| kilowatt-hour | 3.77e-07 kWh |
| British thermal unit | 0.00129 BTU |
| foot-pound | 1 ft⋅lb |
| electron volt | 8.46e+18 eV |
| kiloelectron volt | 8.46e+15 keV |
| megaelectron volt | 8,460,000,000,000 MeV |
How the conversion works
Multiply by 0.001285067463 to go from foot-pound to British thermal unit, or divide by it to go back. Every conversion on this site routes through the SI value (J) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? British thermal unit to foot-pound — 1 BTU = 778.1692623 ft⋅lb.
foot-pound to British thermal unit — common values
| 1 ft⋅lb | 0.0012850675 BTU |
| 2 ft⋅lb | 0.0025701349 BTU |
| 3 ft⋅lb | 0.0038552024 BTU |
| 5 ft⋅lb | 0.0064253373 BTU |
| 10 ft⋅lb | 0.012850675 BTU |
| 15 ft⋅lb | 0.019276012 BTU |
| 20 ft⋅lb | 0.025701349 BTU |
| 25 ft⋅lb | 0.032126687 BTU |
| 50 ft⋅lb | 0.064253373 BTU |
| 75 ft⋅lb | 0.09638006 BTU |
| 100 ft⋅lb | 0.12850675 BTU |
| 250 ft⋅lb | 0.32126687 BTU |
| 500 ft⋅lb | 0.64253373 BTU |
| 1000 ft⋅lb | 1.2850675 BTU |