Energy converters
Kilowatt-hours, joules, calories and BTU, for electricity bills, nutrition labels and heating.
Result
Precision (significant figures)
Formula
J = kWh × 3,600,000
1 kWh = 3,600,000 J
All energy converters
| Converter | Units | Typical use |
|---|---|---|
| Calories to Kilojoules | kcal → kJ | Nutrition labels and diet tracking |
| Kilojoules to Calories | kJ → kcal | Australian and EU food labels |
| Kilowatt-hours to Joules | kWh → J | Electricity, batteries and physics |
Common situations
Why people usually need a energy conversion, and which tool answers it.
A food label shows kilojoules and your app counts Calories (or the reverse).
The numbers are four times apart. The risk: logging four times too much or too little.
Electricity is billed in kWh, gas in therms or MJ, and a battery in kWh.
Different units make the bills impossible to compare. The risk: choosing the more expensive option.