Energy Converter
Joules, calories, kWh and BTU.
1 Kilowatt-hour =British thermal unit (BTU)
| Unit | Value |
|---|---|
| Joule (J) | 3,600,000 |
| Kilojoule (kJ) | 3,600 |
| Calorie (cal) | 860,420.6501 |
| Kilocalorie (kcal) | 860.42065 |
| Watt-hour (Wh) | 1,000 |
| Kilowatt-hour (kWh) | 1 |
| British thermal unit (BTU) | 3,412.141642 |
| Electronvolt (eV) | 2.246943e+25 |
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How this calculator works
Enter a value and choose the units. The value is converted to a base unit, then into the target unit. The table shows the same value in every energy unit.
Formula
Result = value × (factor of "from" unit ÷ factor of "to" unit)
Example
1 kilowatt-hour equals 3,600,000 joules or about 3,412 BTU.
When to use it
- Electricity bills
- Food energy
- Heating and cooling capacity
Frequently asked questions
What is the difference between a calorie and a kilocalorie?
A kilocalorie is 1,000 calories. The Calories on food labels are actually kilocalories.
How many BTU are in a kilowatt-hour?
One kilowatt-hour equals about 3,412 BTU.