Convert megajoules to calories

1 MJ=239,005.74cal

Use the converter below to change any megajoules value into calories instantly — with formula, conversion table, and real-world examples.

You have

Equals

239,005.74

Conversion formula

Forward

calories = megajoules × 239,005.74

Reverse

megajoules = calories × 4.1840e-6

Example: 10 MJ × 239,005.74 = 2,390,057.36 cal.

About both units

From

Megajoule

The megajoule equals 1,000,000 joules. Used for fuel energy content, large-scale mechanical work and in some European natural-gas billing. A litre of petrol contains about 34 MJ of energy.

Real-world: 1 L petrol: ~34 MJ. 1 L diesel: ~38 MJ. Tesla Model 3 full charge: ~270 MJ.

Read full megajoule reference →

Calorie

cal

The gram calorie (small calorie) equals 4.184 joules — the energy to raise 1 g of water by 1 °C. It is a scientific unit, distinct from the nutrition "Calorie" (kcal). Largely replaced by joules in modern science.

Real-world: Raising 1 g of water 1 °C: 1 cal. A 100 kcal snack = 100,000 small calories.

Read full calorie reference →

Megajoule to Calorie conversion table

Common megajoules to calories values for quick reference.

Megajoule (MJ)	Calorie (cal)
1 MJ	239,005.74 cal
10 MJ	2,390,057.36 cal
100 MJ	23,900,573.61 cal
500 MJ	119,502,868.07 cal
1,000 MJ	239,005,736.14 cal
5,000 MJ	1,195,028,680.69 cal
10,000 MJ	2,390,057,361.38 cal
50,000 MJ	11,950,286,806.88 cal
100,000 MJ	23,900,573,613.77 cal
500,000 MJ	119,502,868,068.83 cal

Tips & common mistakes

Quick tips

1 MJ = 1000 kJ = 0.278 kWh.
Natural gas heat content often quoted as MJ/m³.
For fuel economy, use MJ/km or L/100km interchangeably.

Avoid these

Confusing MJ with MW (power).
Using MJ for electricity bills — kWh is standard.
Mixing fuel energy (MJ) with fuel volume (L) without unit conversion.

Frequently asked questions

How many calories in a megajoule?

One megajoule equals 239,005.74 calories.

How do I convert megajoules to calories?

Multiply the megajoule value by 239,005.74 to get the equivalent in calories.

What is 100 megajoules in calories?

100 megajoules equals 23,900,573.61 calories.

Is a megajoule bigger than a calorie?

Yes. 1 megajoule equals 239,005.74 calories, so one megajoule is larger.

How to convert megajoules to calories without a calculator?

Multiply by 239,005.74 for a quick estimate; use a calculator for precise results.

Related energy conversions

📊 See full comparison matrix →

Conversions in other categories

WeightKilogram → Pound LengthKilometer → Mile TemperatureCelsius → Fahrenheit VolumeLiter → US Gallon AreaSquare Meter → Square Foot SpeedKilometer per Hour → Mile per Hour PressureBar → Pound per Square Inch PowerKilowatt → Mechanical Horsepower