How to convert energy units

1. Enter the energy value

   Type the number in the Value field. Scientific notation such as 1.5e6 is accepted.

2. Pick the source unit

   From offers J (joules), kJ (kilojoules), kcal (kilocalories), and kWh (kilowatt-hours). 1 kcal = 4184 J exactly.

3. Pick the target unit

   To lists the same units. Food labels often mix kcal and kJ (1 kcal = 4.184 kJ); electricity bills use kWh (1 kWh = 3,600,000 J).

4. Press Run

   Result is computed via joules as the bridge with 12 significant digits. Round per your context — nutrition labels, electricity bills, physics homework.