BTU to Foot Pounds Converter (BTU to ft⋅lbf)

How to convert British thermal units to foot-pounds

Formulaft⋅lbf = BTU × 778.1692623

Multiply the value in British thermal units by 778.1692623. To go the other way, multiply by 0.001285067463 (or divide by 778.1692623).

A British thermal unit is larger than a foot-pound: one British thermal unit contains 778.1692623 foot-pounds.

Worked examples

1 British thermal unit1 BTU × 778.1692623 = 778.1692623 ft⋅lbf
5 British thermal units5 BTU × 778.1692623 = 3,890.846311 ft⋅lbf
10 British thermal units10 BTU × 778.1692623 = 7,781.692623 ft⋅lbf
20 British thermal units20 BTU × 778.1692623 = 15,563.38525 ft⋅lbf
100 British thermal units100 BTU × 778.1692623 = 77,816.92623 ft⋅lbf

British thermal units to foot-pounds conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

British thermal units to foot-pounds: 0.1–10 BTU
British thermal units (BTU)	Foot-pounds (ft⋅lbf)
0.1 BTU	77.816926 ft⋅lbf
0.25 BTU	194.54232 ft⋅lbf
0.5 BTU	389.08463 ft⋅lbf
1 BTU	778.16926 ft⋅lbf
2 BTU	1,556.3385 ft⋅lbf
3 BTU	2,334.5078 ft⋅lbf
4 BTU	3,112.677 ft⋅lbf
5 BTU	3,890.8463 ft⋅lbf
6 BTU	4,669.0156 ft⋅lbf
7 BTU	5,447.1848 ft⋅lbf
8 BTU	6,225.3541 ft⋅lbf
9 BTU	7,003.5234 ft⋅lbf
10 BTU	7,781.6926 ft⋅lbf

British thermal units to foot-pounds: 12–1,000 BTU
British thermal units (BTU)	Foot-pounds (ft⋅lbf)
12 BTU	9,338.0311 ft⋅lbf
15 BTU	11,672.539 ft⋅lbf
20 BTU	15,563.385 ft⋅lbf
25 BTU	19,454.232 ft⋅lbf
30 BTU	23,345.078 ft⋅lbf
40 BTU	31,126.77 ft⋅lbf
50 BTU	38,908.463 ft⋅lbf
75 BTU	58,362.695 ft⋅lbf
100 BTU	77,816.926 ft⋅lbf
250 BTU	194,542.32 ft⋅lbf
500 BTU	389,084.63 ft⋅lbf
1,000 BTU	778,169.26 ft⋅lbf

About the units

British thermal unit (BTU)

The International Table BTU, 1,055.05585262 J — roughly the energy to heat one pound of water by 1 °F. Furnace and AC capacities are rated in BTU (per hour). One British thermal unit equals 1,055.055853 joules (J).

Foot-pound (ft⋅lbf)

The foot-pound (ft⋅lbf) is a unit of energy in the US customary system. One foot-pound equals 1.355817948 joules (J).

Frequently asked questions

How many foot-pounds are in one British thermal unit?

There are 778.1692623 foot-pounds in one British thermal unit, and this value is exact by definition.

How do I convert British thermal units to foot-pounds?

Multiply the number of British thermal units by 778.1692623. For example, 10 BTU × 778.1692623 = 7,781.692623 ft⋅lbf.

How many British thermal units are in one foot-pound?

One foot-pound equals 0.001285067463 British thermal units. That is the reverse factor, 1 ÷ 778.1692623.

What is 10 British thermal units in foot-pounds?

10 BTU = 7,781.692623 ft⋅lbf.

Is this BTU to ft⋅lbf converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

BTU to Foot Pounds Converter