Energy Converter
Convert energy between joules, calories, watt-hours, and related units.
Calculate
Enter your values below.
Result
Converted value
0
Formula used
Each unit converts through joules as a common base.
Example: 1 kilocalorie ≈ 4,184 joules.
How to use this calculator
- Enter Value.
- Choose From, To.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What is the base unit used internally?
Joules.
Is a food 'Calorie' the same as a calorie?
A food Calorie (capital C) is actually a kilocalorie — this converter's 'kilocalorie' option matches food energy labels.
Can I convert kWh to joules?
Yes, any pair of supported units works.
Where are kilowatt-hours used?
Electricity bills typically measure energy usage in kilowatt-hours.