How to use
Enter a value and pick the units — the result and a table in every energy unit appear instantly.
Definitions
- 1 kWh = 3,412.14 BTU = 3.6 MJ ≈ 860 kcal — electricity is billed in kWh.
- 1 BTU (British thermal unit) ≈ 1,055 J — used for heating and AC capacity.
- 1 food Calorie = 1 kilocalorie = 4.184 kJ.
Examples
- 1 kWh = 3,412 BTU.
- A 12,000 BTU/h air conditioner ≈ 3.5 kW of cooling.
- 2,000 kcal = 8,368 kJ.
FAQ
Is a food Calorie the same as a calorie? No — a food Calorie (capital C) is a kilocalorie, 1,000 small calories.
How do I convert BTU/h to watts? The ratio is the same as BTU → Wh: 1 BTU/h ≈ 0.293 W.
To estimate your daily calorie needs, use the calorie calculator.