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Energy

Convert megajoules to kilocalories

1 MJ=239.006kcal

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

239.0057

Conversion formula

Forward
kilocalories = megajoules × 239.006
Reverse
megajoules = kilocalories × 0.004184

Example: 10 MJ × 239.006 = 2,390.06 kcal.

About both units

From

Megajoule

MJ

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 →
To

Kilocalorie

kcal

The kilocalorie equals 1000 small calories or 4184 joules. This is the nutrition "Calorie" (capital C in some US labels). EU and UK labels always say kcal; US labels say Calories. Adult daily intake is about 2000 kcal.

Real-world: Adult daily intake: ~2000 kcal. Banana: 90 kcal. Big Mac: 550 kcal. 30 min running: ~300 kcal burned.
Read full kilocalorie reference →

Megajoule to Kilocalorie conversion table

Common megajoules to kilocalories values for quick reference.

Megajoule (MJ)Kilocalorie (kcal)
1 MJ239.006 kcal
10 MJ2,390.06 kcal
100 MJ23,900.57 kcal
500 MJ119,502.87 kcal
1,000 MJ239,005.74 kcal
5,000 MJ1,195,028.68 kcal
10,000 MJ2,390,057.36 kcal
50,000 MJ11,950,286.81 kcal
100,000 MJ23,900,573.61 kcal
500,000 MJ119,502,868.07 kcal

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 kilocalories in a megajoule?
One megajoule equals 239.006 kilocalories.
How do I convert megajoules to kilocalories?
Multiply the megajoule value by 239.006 to get the equivalent in kilocalories.
What is 100 megajoules in kilocalories?
100 megajoules equals 23,900.57 kilocalories.
Is a megajoule bigger than a kilocalorie?
Yes. 1 megajoule equals 239.006 kilocalories, so one megajoule is larger.
How to convert megajoules to kilocalories without a calculator?
Multiply by 239.01 for a quick estimate; use a calculator for precise results.

Related energy conversions

📊 See full comparison matrix →

More from Megajoule

MJ → J
1 = 1,000,000 J
MJ → kJ
1 = 1,000 kJ
MJ → kWh
1 = 0.2778 kWh
MJ → Wh
1 = 277.778 Wh
MJ → cal
1 = 239,005.74 cal
MJ → BTU
1 = 947.817 BTU
MJ → eV
1 = 6.2415e24 eV
MJ → thm
1 = 0.009478 thm

More to Kilocalorie

J → kcal
1 = 0.000239 kcal
kJ → kcal
1 = 0.239 kcal
kWh → kcal
1 = 860.421 kcal
Wh → kcal
1 = 0.8604 kcal
cal → kcal
1 = 0.001 kcal
BTU → kcal
1 = 0.2522 kcal
eV → kcal
1 = 3.8293e-23 kcal
thm → kcal
1 = 25,216.44 kcal

Conversions in other categories

WeightKilogram → PoundLengthKilometer → MileTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourPressureBar → Pound per Square InchPowerKilowatt → Mechanical Horsepower