Energy Converter
Convert electrical, thermal, and mechanical energy units with confidence.
3.6 Megajoule (MJ)
Equivalent outputs
Joule (J)
3,600,000
Kilojoule (kJ)
3,600
Watt-hour (Wh)
1,000
Understand power usage, nutrition, and physics at a glance
Whether you are sizing a solar array, translating appliance energy labels, or comparing nutritional calories with exercise output, this converter bridges common units across electrical, thermal, and mechanical contexts. Enter any value, swap units, and review quick equivalents without side math.
We normalize every conversion through Joules, the SI base unit for energy, so the results stay precise regardless of which unit you start with.
Where it helps
- Compare the energy draw of appliances (kWh) with battery specs listed in watt-hours.
- Translate workout calorie goals into kilojoules for science assignments.
- Convert BTU heating capacity into kilowatts when reviewing HVAC equipment.
Accuracy notes
Results are shown to six decimal places by default. Copy them for spreadsheets or reduce the digits for presentations. Keep in mind that appliance ratings often include tolerance ranges—our outputs reflect the theoretical conversion.
Nutritional calories displayed on food packaging are kilocalories (kcal). The converter treats them accordingly so you can swap between kcal, kJ, and kWh confidently.
Sample conversions
- 1 kWh
- = 3.6 MJ ≈ 860 kcal — roughly what a dishwasher cycle consumes.
- 500 kcal
- ≈ 2.09 MJ ≈ 0.58 kWh — equivalent to a brisk 45-minute run.
Related tools
- Check load times with the Power Converter once it ships in Cycle 2.
- Track body metrics with the BMI Calculator after planning nutrition conversions.
FAQ highlights
What about therms or foot-pounds? They are on the backlog. Let us know which specialty units you need and we will prioritize them in the next cycles.
Can I estimate costs? Combine this tool with your utility tariff (price per kWh) and the Percentage Calculator to model savings after upgrades.