Foot-pound to BTU
Convert Foot-pound to BTU instantly. Free online engineering unit converter with exact formula, conversion table and FAQ.
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Formula
BTU = ft-lb × 0.00128507
ft-lb = BTU × 778.169
Conversion table
| 1 ft-lb | 0.00128507 BTU |
| 5 ft-lb | 0.00642534 BTU |
| 10 ft-lb | 0.0128507 BTU |
| 20 ft-lb | 0.0257013 BTU |
| 50 ft-lb | 0.0642534 BTU |
| 100 ft-lb | 0.128507 BTU |
| 500 ft-lb | 0.642534 BTU |
| 1000 ft-lb | 1.28507 BTU |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the Foot-pound (ft-lb). Work from one pound-force over one foot.
What is the destination unit in this conversion?
The destination unit is the BTU (BTU). British thermal unit.
How do I convert Foot-pound to BTU?
Multiply the Foot-pound value by 0.00128507. For example, 10 ft-lb × 0.00128507 = 0.0128507 BTU.
Is the Foot-pound to BTU conversion exact?
Yes. Both units belong to the same engineering measurement family (energy), so the ratio between them is a fixed, defined value rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in Foot-pound needs to be compared with, or reported in, BTU, such as in engineering, scientific, or industrial calculations.
Can I convert BTU back to Foot-pound?
Yes. Multiply the BTU value by 778.169 to get Foot-pound.
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About this conversion
This page converts Foot-pound (ft-lb) to BTU (BTU) within the engineering converter.
Work from one pound-force over one foot. British thermal unit.
The formula is BTU = ft-lb × 0.00128507, based on each unit's fixed relationship to the energy base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common Foot-pound values already converted to BTU.