How to use this converter
Choose your starting and destination units, then enter a value. Results update as you type. You can swap the direction and choose the displayed precision.
Example: Joules to Calories (thermochemical)
value × 0.239005736138 = result
Here the starting unit is Joules (J) and the result is in Calories (thermochemical) (cal). The calculator uses the catalog’s full factors before rounding the displayed result.
Worked examples
- 1 J ≈ 0.23900574 cal
- 10 J ≈ 2.39005736 cal
- 100 J ≈ 23.90057361 cal
Available energy options
Joules (J) · Calories (thermochemical) (cal) · Kilojoules (kJ) · Kilocalories (kcal) · Kilowatt-hours (kWh) · Megajoules (MJ) · Watt-hours (Wh) · Btu (IT) (Btu IT) · Ergs (erg) · Electronvolts (eV) · Foot pound-force (ft·lbf)
Frequently asked questions
Why can displayed results differ slightly?
Numeric results are rounded for display. Increase the precision setting to see more digits. Different unit conventions can also produce different results; check the complete unit label.
Can I convert in the opposite direction?
Use the swap control to reverse the selected units or bases.