Energy Conversion

Instant energy unit converter. Convert Joules to calories, kilojoules, kWh, and BTU with precise scientific conversion factors.

Length Weight Temperature Volume Area Speed Data Pressure Energy Power Time

About Energy Conversion

Energy Converter — convert between Joules, calories, kWh, BTU and more. Helpful for cooking, appliance specs, and physics calculations.

How to use

  1. Enter the energy value.
  2. Select source and target units (J, cal, kWh, BTU).
  3. Click Convert to see results.

Examples

1 kWh = 3.6×106 J; 1 calorie ≈ 4.184 J.

FAQs

When should I use kWh vs J?
kWh is convenient for electrical billing; Joules are used for precise scientific calculations.

For appliance comparisons, use kWh; for lab work, prefer Joules or calories as appropriate.