Energy Converter
Convert energy among J, kJ, cal, kcal, Wh, kWh, and BTU using joules as the reference.
How to use
- Enter an energy value and choose source and target units from J, kJ, cal, kcal, Wh, kWh, and BTU.
Capabilities and scope
Mechanical, thermal, and electrical energy can use different unit names while sharing the same energy dimension represented here in joules.
How it works
The implementation uses cal=4.184 J, kcal=4184 J, Wh=3600 J, kWh=3,600,000 J, and BTU≈1055.055853 J.
Example
1 kWh is 3.6 MJ, or about 860.421 kcal.
Useful for
- Convert electrical energy from kWh to J
- Compare kcal and joules
- Translate BTU into SI energy
Before you use it
- Converting kcal only changes the energy unit; it does not model nutritional absorption or metabolism.
Standards and references
Frequently asked questions
Are kW and kWh the same thing?
No. kW is power, while kWh is energy accumulated over time.