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Megajoules to Kilojoules Converter

Convert megajoules (MJ) to kilojoules (kJ), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
1,000 kJ
joules (watt-seconds)
1,000,000 J
gigajoules
0.001 GJ
calories (thermochemical)
239,005.736138 cal
kilocalories (food Calories)
239.005736138 kcal
megacalories
0.239005736138 Mcal
watt-hours
277.777777778 Wh
kilowatt-hours
0.277777777778 kWh
megawatt-hours
0.000277777777778 MWh
British thermal units (IT)
947.817120313 Btu
million Btu
0.000947817120313 MMBtu
therms (100,000 Btu)
0.00947817120313 thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹³ quad
electronvolts
6.24150907446 × 10²⁴ eV
kiloelectronvolts
6.24150907446 × 10²¹ keV
megaelectronvolts
6.24150907446 × 10¹⁸ MeV

1 MJ = 1,000 kJ

Show the working
  1. 1 MJ = 1000 kJ
  2. 1 × 1000 = 1000 kJ

How to convert megajoules to kilojoules

1 MJ = 1,000 kJ, so multiply by 1,000 to go from megajoules to kilojoules. Going the other way, 1 kJ = 0.001 MJ.

kJ = MJ × 1,000
MJ = kJ × 0.001

Worked example:

1 MJ = 1000 kJ
5 × 1000 = 5000 kJ

Megajoules to kilojoules table

MegajoulesKilojoules
1 MJ1,000 kJ
2 MJ2,000 kJ
3 MJ3,000 kJ
4 MJ4,000 kJ
5 MJ5,000 kJ
6 MJ6,000 kJ
7 MJ7,000 kJ
8 MJ8,000 kJ
9 MJ9,000 kJ
10 MJ10,000 kJ
15 MJ15,000 kJ
20 MJ20,000 kJ
25 MJ25,000 kJ
30 MJ30,000 kJ
40 MJ40,000 kJ
50 MJ50,000 kJ
75 MJ75,000 kJ
100 MJ100,000 kJ
250 MJ250,000 kJ
500 MJ500,000 kJ
1000 MJ1,000,000 kJ

About the units

Formula version 0.1.0Reviewed