Energy Conversion Calculator

Enter Energy Value

Enter energy value for conversion

From Unit (Source)

To Unit (Target)

Energy Conversion Results

Converted Energy

Converted result

SI Units

Joules

SI energy unit

Kilojoules

1000 joules

Megajoules

Million joules

Electrical Units

kWh

Kilowatt hours

Wh

Watt hours

eV

Electron volts

Thermal Units

Calories

Thermal calories

BTU

British thermal units

Food Cal

Dietary calories

Quick Energy Examples

Energy Conversion Reference

1 J = 0.239 cal

1 cal = 4.184 J

1 kWh = 3.6 MJ

1 BTU = 1055 J

1 erg = 10⁻⁷ J

1 eV = 1.602×10⁻¹⁹ J

1 therm = 105.5 MJ

1 ft⋅lb = 1.356 J

Food cal = 1000 cal

TNT = 4.6 MJ/kg

Gasoline = 34.2 MJ/L

Coal = 24 MJ/kg

What this tool does