High-utility tools
Energy Converter
Convert energy between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU.
Interactive calculator
Convert energy units
Compare joules, calories, watt-hours, and BTU units for nutrition, appliances, fuel, and engineering calculations.
Results
Result (kJ)
3600
1 kWh = 3600 kJ
How to use it
- 01Enter the amount of energy you want to convert.
- 02Pick the original unit and the target unit.
- 03Use the result to compare energy values across technical or consumer contexts.
Result guide
- Joules act as the shared base for all conversions on the page.
- Calories and kilocalories are supported alongside appliance-oriented units like watt-hours and kilowatt-hours.
- BTU support makes the page useful for HVAC and heating comparisons as well.
About this calculator
Energy conversion is useful across appliances, utilities, engineering, nutrition, and fuel comparisons because the same quantity can appear in very different unit systems.
A stronger converter includes both scientific units and practical consumer units like kilowatt-hours and calories so the page is useful beyond classroom work.
Frequently asked questions
What is the difference between calorie and kilocalorie?
A kilocalorie is 1,000 small calories and is the unit commonly used for food energy labels.
Why include kilowatt-hours here?
Because kWh is one of the most familiar consumer-facing energy units in electricity usage and appliance comparisons.
Can this help with HVAC comparisons?
Yes. BTU support makes the converter useful for heating and cooling equipment contexts.
Reviewed by Dr. Elena Rostova, MD, PhD
Medical Doctor & Clinical Nutrition Researcher
Reviews health index calculators, unit converter benchmarks, and mathematical models against WHO guidelines and peer-reviewed research.
Sources: Per WHO guidelines / Peer-reviewed research/Standard unit-conversion constants and base-unit references/Cross-checks against known engineering and metric conversion values
Disclaimer: Calculator results are for general reference and educational purposes only per WHO standards. Health indexes and mathematical models are not a substitute for professional medical diagnosis, clinical nutrition, or certified trade advice.
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