Joule to Foot-pound Conversion
Convert between Joule and Foot-pound quickly and accurately.
How to Convert Joule to Foot-pound
Conversion Formula
Example
Convert 15 J to ft⋅lbf:
Unit Information
Learn about the energy units you're converting between
Joule
J
Definition
The joule (symbol: J) is the SI base unit of energy, work, and heat. It is defined as the work done when a force of one newton moves an object one meter in the direction of the force. One joule equals one newton-meter or one watt-second.
History/Origin
The joule was named after James Prescott Joule (1818-1889), an English physicist who established the mechanical equivalent of heat. It was officially adopted as the SI unit of energy in 1948, replacing the calorie in scientific contexts.
Current Use
Joules are used universally in physics, engineering, and chemistry for measuring energy, work, and heat. Applications include electrical energy calculations, mechanical work, thermal energy, and energy efficiency measurements in all scientific and industrial fields.
Multiplier
1
Offset
0
Foot-pound
ft⋅lbf
Definition
A foot-pound (symbol: ft⋅lbf) is a unit of energy or work in the imperial system, equal to approximately 1.356 joules. It represents the work done when a force of one pound-force moves an object one foot in the direction of the force.
History/Origin
The foot-pound was developed in the British imperial system for measuring mechanical work and energy. It became widely used in engineering and mechanical applications, particularly in the United States and other countries using imperial units.
Current Use
Foot-pounds are used in mechanical engineering for measuring torque and work, in automotive industry for engine specifications, in ballistics for projectile energy, and in mechanical systems for energy transfer calculations.
Multiplier
1.356
Offset
0
Joule to Foot-pound Conversion Table
| Joule [J] | Foot-pound [ft⋅lbf] |
|---|---|
| 1 J | 0.737562 ft⋅lbf |
| 10 J | 7.375621 ft⋅lbf |
| 25 J | 18.439054 ft⋅lbf |
| 50 J | 36.878107 ft⋅lbf |
| 100 J | 73.756215 ft⋅lbf |
| 0 J | 0E+0 ft⋅lbf |
| -10 J | -7.375621 ft⋅lbf |
| -40 J | -29.502486 ft⋅lbf |
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