DigitalConvertersPro
Energy Converter
Energy Converter – Convert Joules, Calories, kWh, BTU & More
Instantly convert between energy units like joules (J), kilojoules (kJ), kilowatt-hours (kWh), calories (cal), and BTU. Our free energy conversion tool is useful for science, fitness, engineering, and energy monitoring.
What is Energy? – Definition
Energy is the capacity to do work or produce heat. It exists in various forms such as kinetic, potential, thermal, and electrical energy.
Example:A chocolate bar might contain 500 kilocalories of energy, while an electric heater may use 2 kilowatt-hours. Both are measures of energy in different contexts.
Commonly Used Energy Units
- Joule (J) – SI unit of energy
- Kilojoule (kJ) – 1 kJ = 1,000 J
- Calorie (cal) – Used in food energy; 1 cal = 4.184 J
- Kilocalorie (kcal) – 1 kcal = 1,000 cal
- Kilowatt-hour (kWh) – Used in electrical energy billing
- BTU – British Thermal Unit, used in heating and cooling
How to Use the Energy Converter
- Enter the value you want to convert
- Select the “From” unit and “To” unit from the dropdowns
- Instantly see the converted value
- Optional: Copy the result or try another conversion