General Engineering
Energy and Work Converter
Convert energy and work between joules, watt-hours, foot-pounds, and Btu.
Live unit conversion
Converted value
737.56215
ft lbf
1 kJ = 737.56215 ft lbf
Conversion Basis
Energy and work conversions appear in equipment, thermal, impact, and power-consumption calculations. One joule is one newton meter of work, although a moment value is not automatically work.
target energy = source energy x source-to-joule factor / target-to-joule factor
Common Examples
- 1 kJ = 737.562 ft lbf
- 1 kWh = 3.6 MJ
- 1 Btu = 1.05506 kJ
Engineering Use and Limitations
- Btu definitions vary slightly; this tool uses the International Table Btu.
- Energy is power integrated over time, so kW and kWh are not interchangeable.
- Impact and dynamic problems may require efficiency and loss terms beyond a unit conversion.
Keep converting
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