Energy Converter
Convert between energy units
How to Use
1
Enter a value
Input the energy value you want to convert.
2
Select source unit
Choose the unit you are converting from (e.g., joules, calories, kWh, BTU).
3
View all conversions
See the equivalent value in all other energy units instantly.
4
Copy any value
Click on any conversion result to copy it to your clipboard.
Frequently Asked Questions
What is the difference between calories and kilocalories?
Food "Calories" are actually kilocalories (kcal). 1 kcal = 1,000 calories (small cal) = 4.184 kJ.
How do I convert kWh to joules?
Multiply kWh by 3,600,000. For example, 1 kWh = 3.6 MJ (megajoules).
What is a BTU?
BTU (British Thermal Unit) is the energy needed to heat 1 pound of water by 1°F. It's used for heating/cooling systems.
What is an electron volt?
An electron volt (eV) is a tiny energy unit used in particle physics, equal to about 1.6 × 10⁻¹⁹ joules.