Energy Converter
Free, locally-processed energy converter for fast and secure results.
Runs locally in your browser
Your inputs are processed locally in your browser and are not uploaded or stored by us.
Converts energy and work measurements safely.
How to use the Energy Converter
- Enter the energy value.
- Select the starting unit.
- Select the target unit.
- Click Calculate.
Energy conversion methodology
1 Wh = 3600 J
1 kWh = 3.6 MJ
1 thermochemical calorie = 4.184 J
1 kcal = 4184 J
1 eV = 1.602176634 × 10⁻¹⁹ J
The calculator uses the joule as the canonical base unit.
Energy conversion example
Value1
From UnitKilowatt-hour
To UnitMegajoule
1 kWh × 3.6 MJ/kWh
Result: 3.6 MJ
Notes
- Qualified terminology such as Calorie (thermochemical) and BTU (IT) is explicitly preserved to avoid collapsing them into generic historical unit names.
- The calculator uses documented conversion constants without rounding intermediate calculation values. Display formatting may shorten the visible result.
- Negative energy values are rejected as invalid.