Energy Converter
Instantly convert Energy between SI and common engineering units including Joule (J), kJ, MJ, Wh. No formula lookup required.
Convert
About
Value × conversion factor to SI base (temperature uses affine offset), then restored to target unit.
Bidirectional conversion with unit swap supported.
How to use
- Enter the value to convert in the Value box.
- Pick the source and target units from the From / To dropdowns.
- Click Convert; the result shows below. Use ⇅ to swap units.
Formula notesUnit conversion (energy): 能量：1 kWh = 3.6 MJ，1 cal = 4.184 J，1 Btu ≈ 1055 J。