Megajoule (MJ) Conversion Calculator

Joules (J)
1,000,000
Kilowatt Hours (kWh)
0.278
Calories (kcal)
239.006
BTU
947.817
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Understanding Megajoules (MJ)

A megajoule (MJ) is a unit of energy measurement in the International System of Units (SI). One megajoule equals 1,000,000 joules (1 × 10⁶ J). To put this in perspective:

  • Running a 1000W microwave for 1000 seconds uses 1 megajoule
  • A 100-watt light bulb running for 2.78 hours consumes 1 megajoule
  • One megajoule can heat 2.39 liters of water from room temperature to boiling

Common Uses of Megajoules

Megajoules are commonly used in:

  • Measuring food energy content
  • Industrial energy consumption
  • Power plant output calculations
  • Scientific research and experiments