Foot-Pound to BTU (IT) Converter

Energy Converter

27 units available

Decimals:

From

To

0.001285

1 ft·lbf = 0.001285 BTU (IT)

Formula:

BTU (IT) = ft·lbf × 0.0012850675

With your value: 1 ft·lbf = 0.00128507 BTU (IT)

How big is that?

Everyday references on a logarithmic scale, all expressed in foot-pound so you can sanity-check the result.

Heartbeat (1/1.4 your value)0.738 ft·lbf

Your value1.00 ft·lbf

AA battery charge (7.4e+3× your value)7.38e+3 ft·lbf

Slice of bread (2.1e+5× your value)2.07e+5 ft·lbf

Daily food intake (6.2e+6× your value)6.20e+6 ft·lbf

Litre of petrol (2.5e+7× your value)2.52e+7 ft·lbf

Other Foot-Pound to BTU (IT) conversions

2 ft·lbf to BTU (IT)3 ft·lbf to BTU (IT)4 ft·lbf to BTU (IT)5 ft·lbf to BTU (IT)6 ft·lbf to BTU (IT)7 ft·lbf to BTU (IT)8 ft·lbf to BTU (IT)

Foot-Pound to BTU (IT) Conversion Table

Foot-Pound (ft·lbf)	BTU (IT) (BTU (IT))
0.5	0.000643
1	0.001285
2	0.00257
5	0.006425
10	0.012851
15	0.019276
20	0.025701
25	0.032127
50	0.064253
100	0.128507
250	0.321267
500	0.642534
1000	1.285067

BTU (IT) to Foot-Pound Conversion Table

BTU (IT) (BTU (IT))	Foot-Pound (ft·lbf)
0.5	389.084631
1	778.169262
2	1,556.338525
5	3,890.846311
10	7,781.692623
15	11,672.538934
20	15,563.385246
25	19,454.231557
50	38,908.463114
100	77,816.926228
250	194,542.315571
500	389,084.631142
1000	778,169.262284

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Foot-Pound (ft·lbf)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

BTU (IT) (BTU (IT))

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Foot-Pound to BTU (IT)

To convert from Foot-Pound (ft·lbf) to BTU (IT) (BTU (IT)), multiply the value by 0.0012850675.

Formula: BTU (IT) = ft·lbf × 0.0012850675

Reverse: ft·lbf = BTU (IT) × 778.169262284

Step-by-Step Example

Start with your value in Foot-Pound. For example: 5 ft·lbf
Multiply by the conversion factor: 5 x 0.0012850675
The result is: 0.006425 BTU (IT)

About Foot-Pound

The foot-pound (ft·lbf) is a unit of energy and work. One foot-pound equals 1.355817948 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

About BTU (IT)

The btu (it) (BTU (IT)) is a unit of energy and work. One btu (it) equals 1055.055853 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many BTU (IT) are in 1 Foot-Pound?

There are exactly 0.0012850675 BTU (IT) in 1 Foot-Pound. This means the conversion factor from Foot-Pound to BTU (IT) is 0.0012850675.

What is the formula to convert Foot-Pound to BTU (IT)?

The formula to convert Foot-Pound to BTU (IT) is: BTU (IT) = ft·lbf × 0.0012850675. For example, to convert 10 Foot-Pound to BTU (IT), you would multiply 10 by 0.0012850675.

What is a Foot-Pound?