How do I convert MJ to kWh?

Formula : kWh = MJ × 0.278 (or MJ ÷ 3.6) Examples : 1 MJ = 0.278 kWh 10 MJ = 2.78 kWh 100 MJ = 27.8 kWh 3.6 MJ = 1 kWh MJ to kWh converter →

How many MJ in a liter of gasoline?

1 liter of gasoline ≈ 32 MJ (varies slightly by formulation) Other fuels : Diesel: ~36 MJ/liter (higher energy density) E85 ethanol: ~24 MJ/liter LPG: ~26 MJ/liter Jet fuel: ~35 MJ/liter

How do I convert MJ to joules?

Formula : J = MJ × 1,000,000 Examples : 1 MJ = 1,000,000 J 0.1 MJ = 100,000 J = 100 kJ 10 MJ = 10,000,000 J = 10,000 kJ MJ to Joules converter →

How many MJ does a car use per 100 km?

Typical fuel consumption : Small car (5 L/100km): ~160 MJ/100km Medium car (8 L/100km): ~256 MJ/100km SUV (12 L/100km): ~384 MJ/100km Electric car (20 kWh/100km): ~72 MJ/100km Gasoline cars use roughly 2-3x more energy than EVs due to engine efficiency losses.

Megajoule (MJ) - Unit Information & Conversion

Symbol:MJ

Plural:megajoules

Category:Energy

🔄 Quick Convert Megajoule

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What is a Megajoule?

Megajoule (MJ) = 1 million joules = 1,000 kJ. Used for vehicle crash testing, fuel energy content, large-scale systems. 1 liter of gasoline ≈ 32 MJ. 1 MJ = 0.278 kWh = 948 BTU. Common in automotive and energy industries.

History of the Megajoule

SI metric prefix mega applied to joule. Standard for quantifying fuel energy content, vehicle testing, and industrial energy measurements since mid-20th century.

Quick Answer

What is a Megajoule? A megajoule (MJ) = 1,000,000 joules = 1,000 kJ. Used for fuel energy (1 liter gasoline ≈ 32 MJ), car crash tests, food manufacturing. 1 MJ ≈ 0.278 kWh ≈ 239 kcal. Household daily electricity: ~100-150 MJ. Use our energy converter for conversions.

Definition

1 MJ = 1,000,000 J = 1,000 kJ = 0.278 kWh = 948 BTU = 239 kcal

Common Uses

Automotive: Crash test energy, fuel energy content specifications. Energy: Natural gas content, biomass energy, fuel comparisons. Manufacturing: Industrial heating, process energy requirements. Nutrition: Large-scale food production energy calculations.

Real-World Examples

Fuel Energy Content

1 liter gasoline: ~32 MJ
1 gallon gasoline: ~121 MJ
1 liter diesel: ~36 MJ
1 kg natural gas: ~55 MJ
1 kg coal: ~24 MJ
1 kg wood: ~15 MJ

Household Energy

Daily electricity (30 kWh): ~108 MJ
Gas furnace (1 hour): ~40-80 MJ
Hot shower: ~10-15 MJ
Cooking dinner: ~5-10 MJ

Vehicle Energy

Car fuel tank (50L): ~1,600 MJ
100 km drive: ~160-320 MJ (5-10L fuel)
Crash test (64 km/h): ~0.4 MJ kinetic energy
EV battery (75 kWh): ~270 MJ

Megajoule Conversion Formulas

To Joule:

1 MJ = 1000000 J

Example: 5 megajoules = 5000000 joules

To Kilojoule:

1 MJ = 1000 kJ

Example: 5 megajoules = 5000 kilojoules

To Gigajoule:

1 MJ = 0.001 GJ

Example: 5 megajoules = 0.005 gigajoules

To Watt-hour:

1 MJ = 277.777778 Wh

Example: 5 megajoules = 1388.888889 watt-hours

To Kilowatt-hour:

1 MJ = 0.277778 kWh

Example: 5 megajoules = 1.388889 kilowatt-hours

To Megawatt-hour:

1 MJ = 0.000278 MWh

Example: 5 megajoules = 0.001389 megawatt-hours

To Calorie:

1 MJ = 239005.736138 cal

Example: 5 megajoules = 1195028.680688 calories

To Kilocalorie:

1 MJ = 239.005736 kcal

Example: 5 megajoules = 1195.028681 kilocalories

To British Thermal Unit:

1 MJ = 947.813394 BTU

Example: 5 megajoules = 4739.066972 BTUs

To Therm:

1 MJ = 0.009478 therm

Example: 5 megajoules = 0.047391 therms

To Foot-pound:

1 MJ = 737562.12117 ft⋅lb

Example: 5 megajoules = 3687810.605848 foot-pounds

To Electronvolt:

1 MJ = N/A eV

Example: 5 megajoules = N/A electronvolts

To Erg:

1 MJ = 10000000000000 erg

Example: 5 megajoules = 50000000000000 ergs

To Quad:

1 MJ = 9.4781e-13 quad

Example: 5 megajoules = 4.7391e-12 quads

Frequently Asked Questions

Formula: kWh = MJ × 0.278 (or MJ ÷ 3.6) Examples:

1 MJ = 0.278 kWh
10 MJ = 2.78 kWh
100 MJ = 27.8 kWh
3.6 MJ = 1 kWh MJ to kWh converter →

Convert Megajoule

Need to convert Megajoule to other energy units? Use our conversion tool.

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