Energy Converter
Convert between different energy units instantly. Supports joules (J), kilojoules (kJ), calories, kilocalories, kilowatt-hours (kWh), BTU, electronvolts (eV), and more. Essential for physics, nutrition, heating calculations, and electrical applications.
3,600,000 Joule (J)
1 Kilowatt-hour (kWh) = 3,600,000 Joule (J)
Common Energy Values
Food Calorie
1 kcal = 4,184 J = 1.163 Wh
1 kWh
3.6 MJ = 860.4 kcal
FAQ
How many joules are in a calorie?
One calorie (small calorie) equals exactly 4.184 joules. One kilocalorie (food Calorie, written with capital C) equals 4,184 joules or 4.184 kilojoules.
How do I convert kWh to joules?
One kilowatt-hour (kWh) equals 3,600,000 joules (3.6 megajoules). To convert, multiply kWh by 3,600,000. For example, 2 kWh equals 7,200,000 joules.
What is a BTU?
BTU (British Thermal Unit) is the amount of heat needed to raise one pound of water by one degree Fahrenheit. One BTU equals approximately 1,055 joules. BTUs are commonly used for heating and cooling systems.