Converters
Work & Energy Converter
Enter a value once, pick its unit, and see it converted to every other work/energy unit — joules, calories, kWh, BTU, and more — instantly.
Converted to all energy units
Tip: click any row to make that unit the input.
How It Works
Every unit is converted through the joule (J), the SI unit of energy, using exact defined factors (1 kWh = 3,600,000 J; 1 BTU (IT) = 1,055.05585262 J; 1 thermochemical calorie = 4.184 J). The list updates live as you type.
Example
1 kWh = 3,600 kJ = 860.42 kcal = 3,412.14 BTU = 0.000086 toe
Frequently Asked Questions
How do I convert between two specific units?
Enter your value, select the unit it's in from the "From unit" dropdown, and read the result off the row for the unit you want. Clicking a row makes that unit the new input, so you can chain conversions.
Are food Calories the same as calories here?
A food Calorie (kcal) is 1,000 small calories. This tool uses the thermochemical calorie (4.184 J exactly), so 1 kcal = 4,184 J; a 2,000 kcal diet ≈ 2.32 kWh.
What is a tonne of oil equivalent (toe)?
The toe is an energy-statistics unit: the energy in one tonne of crude oil, standardized as 41.868 GJ ≈ 11,630 kWh. It appears in national energy balances.
Are the conversion factors exact?
Yes. kWh, calorie (4.184 J), kgf·m, BTU (IT, 1,055.05585262 J), ft·lbf, and toe (41.868 GJ, IEA convention) are all exact defined values. Displayed results are rounded for readability.