The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
Btu to Foot-pounds
Convert British thermal unit (BTU) to Foot-pound (ft-lb) instantly with an exact formula, conversion table, and FAQ.
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Convert btu (BTU) to foot-pounds (ft-lb) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A foot-pound (ft-lb) is the work done by one pound-force acting through a distance of one foot, commonly used in mechanical and engineering calculations.
ft-lb = BTU × 778.1692623
Results update instantly for Btu to Foot-pounds conversions.
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Formula
ft-lb = BTU × 778.1692623
BTU = ft-lb × 0.001285067463
Conversion table
| 1 BTU | 778.169262 ft-lb |
| 5 BTU | 3890.846311 ft-lb |
| 10 BTU | 7781.692623 ft-lb |
| 20 BTU | 15563.385245 ft-lb |
| 50 BTU | 38908.463113 ft-lb |
| 100 BTU | 77816.926227 ft-lb |
| 500 BTU | 389084.631133 ft-lb |
| 1000 BTU | 778169.262266 ft-lb |
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How the formula works
Both british thermal unit and foot-pound measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in btu by 778.1692623 to get foot-pounds. To reverse the conversion, multiply a foot-pound value by 0.001285067463 to get back to btu.
Frequently asked questions
What is British thermal unit (BTU)?
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
What is Foot-pound (ft-lb)?
A foot-pound (ft-lb) is the work done by one pound-force acting through a distance of one foot, commonly used in mechanical and engineering calculations.
How do I convert btu to foot-pounds?
Multiply the british thermal unit value by 778.1692623 to get the equivalent in foot-pounds. For example, 5 BTU × 778.1692623 = 3890.846311 ft-lb.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 778.1692623 is an exact, non-rounded value.
Can I convert foot-pounds back to btu?
Yes. Divide the foot-pound value by 778.1692623, or multiply it by 0.001285067463, to get btu.
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About converting btu to foot-pounds
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings. A foot-pound (ft-lb) is the work done by one pound-force acting through a distance of one foot, commonly used in mechanical and engineering calculations.
Use this calculator to move between btu and foot-pounds accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.