Food calories
Converts kcal↔kJ on nutrition labels (1 kcal=4.184 kJ).
Unit Converter
Energy Converter — J, kcal, kWh, cal
Instantly convert joules (J), kJ, calories (cal, kcal), and watt-hours (Wh, kWh). Handy for food calories and electricity.
Converted to
J4,184
kJ4.184
cal1,000
kcal1
Wh1.162
kWh0.001
What is the energy converter?
It converts between joules (J), kJ, calories (cal, kcal), and watt-hours (Wh, kWh). Useful for food labels (kcal↔kJ) and electricity use (kWh).
How to use
- 1 Enter the value to convert.
- 2 Choose the source unit (e.g. kcal).
- 3 Read the converted results in every unit.
Highlights
Electricity
Convert Wh/kWh for energy usage.
Instant
Results update as you type.
FAQ
How many kJ in a kcal?+
1 kcal = 4.184 kJ, often shown together on nutrition labels.
How many kJ in a kWh?+
1 kWh = 3600 kJ = 3,600,000 J.
Food calorie vs cal?+
A food 'calorie' usually means 1 kcal (=1000 cal).
Related converters
Food 'calories' usually mean kcal (=1000 cal). For general reference.