Energy Unit Converter
Instantly convert between joules (J), kilojoules (kJ), calories (cal), and kilowatt-hours (kWh)
Unit Converter
Enter an energy value to instantly view conversions across joules, kilojoules, calories, and kilowatt-hours — the most common units in physics, engineering, and energy analysis.
About the Energy Unit Converter
The EngLab Energy Converter provides instant, accurate conversions between joules (J), kilojoules (kJ), calories (cal), and kilowatt-hours (kWh). This tool is ideal for physics, electrical, and mechanical engineering applications where energy transformations and efficiency calculations are essential.
How to Use the Energy Converter
Simply enter a value in the input box and choose your starting unit. The converter automatically calculates and displays results for all other energy units in a live-updating table. Perfect for students, engineers, researchers, and energy professionals.
Popular Energy Conversions
- J → kJ – Convert joules to kilojoules
- J → cal – Convert joules to calories
- kJ → kWh – Convert kilojoules to kilowatt-hours
- cal → J – Convert calories to joules