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Gigajoules to Kilojoules Converter

Convert gigajoules (GJ) 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
1,000,000 kJ
joules (watt-seconds)
1,000,000,000 J
megajoules
1,000 MJ
calories (thermochemical)
239,005,736.138 cal
kilocalories (food Calories)
239,005.736138 kcal
megacalories
239.005736138 Mcal
watt-hours
277,777.777778 Wh
kilowatt-hours
277.777777778 kWh
megawatt-hours
0.277777777778 MWh
British thermal units (IT)
947,817.120313 Btu
million Btu
0.947817120313 MMBtu
therms (100,000 Btu)
9.47817120313 thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹⁰ quad
electronvolts
6.24150907446 × 10²⁷ eV
kiloelectronvolts
6.24150907446 × 10²⁴ keV
megaelectronvolts
6.24150907446 × 10²¹ MeV

1 GJ = 1,000,000 kJ

Show the working
  1. 1 GJ = 1000000 kJ
  2. 1 × 1000000 = 1000000 kJ

How to convert gigajoules to kilojoules

1 GJ = 1,000,000 kJ, so multiply by 1,000,000 to go from gigajoules to kilojoules. Going the other way, 1 kJ = 1 × 10⁻⁶ GJ.

kJ = GJ × 1,000,000
GJ = kJ × 1

Worked example:

1 GJ = 1000000 kJ
5 × 1000000 = 5000000 kJ

Gigajoules to kilojoules table

GigajoulesKilojoules
1 GJ1,000,000 kJ
2 GJ2,000,000 kJ
3 GJ3,000,000 kJ
4 GJ4,000,000 kJ
5 GJ5,000,000 kJ
6 GJ6,000,000 kJ
7 GJ7,000,000 kJ
8 GJ8,000,000 kJ
9 GJ9,000,000 kJ
10 GJ10,000,000 kJ
15 GJ15,000,000 kJ
20 GJ20,000,000 kJ
25 GJ25,000,000 kJ
30 GJ30,000,000 kJ
40 GJ40,000,000 kJ
50 GJ50,000,000 kJ
75 GJ75,000,000 kJ
100 GJ100,000,000 kJ
250 GJ250,000,000 kJ
500 GJ500,000,000 kJ
1000 GJ1,000,000,000 kJ

About the units

Formula version 0.1.0Reviewed