Definition
Energy measures the capacity to do work or transfer heat.
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Energy Converter
Convert energy units including joules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU.
Quick Values:
Decimals:
Result:
0.00001 Megaelectronvolt
Popular Converters
Kilowatt-hours to Joules→Joules to Kilowatt-hours→Calories to Joules→Joules to Calories→BTU to Kilowatt-hours→Kilowatt-hours to BTU→Kilocalories to Kilojoules→Kilojoules to Kilocalories→BTU to Joules→Joules to BTU→Kilowatt-hours to Watt-hours→Watt-hours to Kilowatt-hours→Kilojoules to Joules→Joules to Kilojoules→Calories to Kilocalories→
Educational Guide
Common Uses
Energy conversions support nutrition, electricity billing, HVAC sizing, physics, and battery calculations.
Industries
Utilities, food science, HVAC, automotive, electronics, and research all use energy units.
Tips
Use joules for SI calculations, kilowatt-hours for electric energy, and BTU for many heating and cooling contexts.
Frequently Asked Questions
What is the SI unit of energy?
The joule is the SI derived unit of energy.
What is the difference between calorie and kilocalorie?
One kilocalorie equals 1,000 thermochemical calories and is the food Calorie commonly used on nutrition labels.
How many joules are in a kilowatt-hour?
One kilowatt-hour equals exactly 3,600,000 joules.
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