Gigajoule (GJ) Conversion Calculator

Gigajoule Conversion Calculator

Enter a value in gigajoules below to convert to another unit of energy.

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What Is a Gigajoule?

A gigajoule is a unit used to measure energy.

The gigajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "giga" is the prefix for billions, or 10⁹. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.

How Much Is a Gigajoule?

One gigajoule is equal to 1,000,000,000 joules, which is the energy equal to the force on an object of one newton at a distance of one meter.

How to Convert Gigajoules

To convert gigajoules to another unit of energy, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.^[1]

You can find the conversion factors for gigajoules in the conversion table below.

Then, multiply the energy measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

gigajoules × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

Gigajoule Conversion Table

Common gigajoule values and equivalent imperial and metric energy measurements
gigajoules	joules	kilojoules	megajoules	calories	kilocalories	megacalories	watt-hours	kilowatt-hours	megawatt-hours	watt-seconds	british thermal units	million BTU	therms	quads	electronvolts	kiloelectronvolts	megaelectronvolts
1 GJ	1,000,000,000 J	1,000,000 kJ	1,000 MJ	239,005,736 cal	239,006 kcal	239.005736 Mcal	277,778 Wh	277.777778 kWh	0.277778 MWh	1,000,000,000 Ws	947,817 BTU	0.947817 MMBTU	9.478171	0.00000000094782	6,241,500,000,000,000,443,161,772,032 eV	6,241,499,999,999,999,833,276,416 keV	6,241,499,999,999,999,606,784 MeV
2 GJ	2,000,000,000 J	2,000,000 kJ	2,000 MJ	478,011,472 cal	478,011 kcal	478.011472 Mcal	555,556 Wh	555.555556 kWh	0.555556 MWh	2,000,000,000 Ws	1,895,634 BTU	1.895634 MMBTU	18.956342	0.0000000018956	12,483,000,000,000,000,886,323,544,064 eV	12,482,999,999,999,999,666,552,832 keV	12,482,999,999,999,999,213,568 MeV
3 GJ	3,000,000,000 J	3,000,000 kJ	3,000 MJ	717,017,208 cal	717,017 kcal	717.017208 Mcal	833,333 Wh	833.333333 kWh	0.833333 MWh	3,000,000,000 Ws	2,843,451 BTU	2.843451 MMBTU	28.434514	0.0000000028435	18,725,000,000,000,000,819,181,125,632 eV	18,725,000,000,000,000,853,540,864 keV	18,725,000,000,000,000,786,432 MeV
4 GJ	4,000,000,000 J	4,000,000 kJ	4,000 MJ	956,022,945 cal	956,023 kcal	956.022945 Mcal	1,111,111 Wh	1,111 kWh	1.111111 MWh	4,000,000,000 Ws	3,791,268 BTU	3.791268 MMBTU	37.912685	0.0000000037913	24,966,000,000,000,001,772,647,088,128 eV	24,965,999,999,999,999,333,105,664 keV	24,965,999,999,999,998,427,136 MeV
5 GJ	5,000,000,000 J	5,000,000 kJ	5,000 MJ	1,195,028,681 cal	1,195,029 kcal	1,195 Mcal	1,388,889 Wh	1,389 kWh	1.388889 MWh	5,000,000,000 Ws	4,739,086 BTU	4.739086 MMBTU	47.390856	0.0000000047391	31,207,999,999,999,999,506,481,414,144 eV	31,207,999,999,999,998,372,610,048 keV	31,207,999,999,999,997,902,848 MeV
6 GJ	6,000,000,000 J	6,000,000 kJ	6,000 MJ	1,434,034,417 cal	1,434,034 kcal	1,434 Mcal	1,666,667 Wh	1,667 kWh	1.666667 MWh	6,000,000,000 Ws	5,686,903 BTU	5.686903 MMBTU	56.869027	0.0000000056869	37,448,999,999,999,998,260,924,121,088 eV	37,449,000,000,000,001,147,142,144 keV	37,448,999,999,999,999,737,856 MeV
7 GJ	7,000,000,000 J	7,000,000 kJ	7,000 MJ	1,673,040,153 cal	1,673,040 kcal	1,673 Mcal	1,944,444 Wh	1,944 kWh	1.944444 MWh	7,000,000,000 Ws	6,634,720 BTU	6.63472 MMBTU	66.347198	0.0000000066347	43,691,000,000,000,000,392,804,958,208 eV	43,691,000,000,000,000,186,646,528 keV	43,691,000,000,000,003,407,872 MeV
8 GJ	8,000,000,000 J	8,000,000 kJ	8,000 MJ	1,912,045,889 cal	1,912,046 kcal	1,912 Mcal	2,222,222 Wh	2,222 kWh	2.222222 MWh	8,000,000,000 Ws	7,582,537 BTU	7.582537 MMBTU	75.82537	0.0000000075825	49,932,000,000,000,003,545,294,176,256 eV	49,931,999,999,999,998,666,211,328 keV	49,931,999,999,999,996,854,272 MeV
9 GJ	9,000,000,000 J	9,000,000 kJ	9,000 MJ	2,151,051,625 cal	2,151,052 kcal	2,151 Mcal	2,500,000 Wh	2,500 kWh	2.5 MWh	9,000,000,000 Ws	8,530,354 BTU	8.530354 MMBTU	85.303541	0.0000000085304	56,174,000,000,000,001,279,128,502,272 eV	56,173,999,999,999,997,705,715,712 keV	56,174,000,000,000,000,524,288 MeV
10 GJ	10,000,000,000 J	10,000,000 kJ	10,000 MJ	2,390,057,361 cal	2,390,057 kcal	2,390 Mcal	2,777,778 Wh	2,778 kWh	2.777778 MWh	10,000,000,000 Ws	9,478,171 BTU	9.478171 MMBTU	94.781712	0.0000000094782	62,414,999,999,999,995,635,524,698,112 eV	62,414,999,999,999,996,185,280,512 keV	62,415,000,000,000,002,359,296 MeV
11 GJ	11,000,000,000 J	11,000,000 kJ	11,000 MJ	2,629,063,098 cal	2,629,063 kcal	2,629 Mcal	3,055,556 Wh	3,056 kWh	3.055556 MWh	11,000,000,000 Ws	10,425,988 BTU	10.425988 MMBTU	104.259883	0.000000010426	68,657,000,000,000,002,165,452,046,336 eV	68,657,000,000,000,003,814,719,488 keV	68,656,999,999,999,997,640,704 MeV
12 GJ	12,000,000,000 J	12,000,000 kJ	12,000 MJ	2,868,068,834 cal	2,868,069 kcal	2,868 Mcal	3,333,333 Wh	3,333 kWh	3.333333 MWh	12,000,000,000 Ws	11,373,805 BTU	11.373805 MMBTU	113.738054	0.000000011374	74,897,999,999,999,996,521,848,242,176 eV	74,898,000,000,000,002,294,284,288 keV	74,897,999,999,999,999,475,712 MeV
13 GJ	13,000,000,000 J	13,000,000 kJ	13,000 MJ	3,107,074,570 cal	3,107,075 kcal	3,107 Mcal	3,611,111 Wh	3,611 kWh	3.611111 MWh	13,000,000,000 Ws	12,321,623 BTU	12.321623 MMBTU	123.216226	0.000000012322	81,139,999,999,999,994,255,682,568,192 eV	81,139,999,999,999,992,743,854,080 keV	81,139,999,999,999,994,757,120 MeV
14 GJ	14,000,000,000 J	14,000,000 kJ	14,000 MJ	3,346,080,306 cal	3,346,080 kcal	3,346 Mcal	3,888,889 Wh	3,889 kWh	3.888889 MWh	14,000,000,000 Ws	13,269,440 BTU	13.26944 MMBTU	132.694397	0.000000013269	87,380,999,999,999,997,408,171,786,240 eV	87,381,000,000,000,008,403,288,064 keV	87,380,999,999,999,996,592,128 MeV
15 GJ	15,000,000,000 J	15,000,000 kJ	15,000 MJ	3,585,086,042 cal	3,585,086 kcal	3,585 Mcal	4,166,667 Wh	4,167 kWh	4.166667 MWh	15,000,000,000 Ws	14,217,257 BTU	14.217257 MMBTU	142.172568	0.000000014217	93,623,000,000,000,003,938,099,134,464 eV	93,622,999,999,999,998,852,857,856 keV	93,622,999,999,999,991,873,536 MeV
16 GJ	16,000,000,000 J	16,000,000 kJ	16,000 MJ	3,824,091,778 cal	3,824,092 kcal	3,824 Mcal	4,444,444 Wh	4,444 kWh	4.444444 MWh	16,000,000,000 Ws	15,165,074 BTU	15.165074 MMBTU	151.650739	0.000000015165	99,864,000,000,000,007,090,588,352,512 eV	99,863,999,999,999,997,332,422,656 keV	99,863,999,999,999,993,708,544 MeV
17 GJ	17,000,000,000 J	17,000,000 kJ	17,000 MJ	4,063,097,514 cal	4,063,098 kcal	4,063 Mcal	4,722,222 Wh	4,722 kWh	4.722222 MWh	17,000,000,000 Ws	16,112,891 BTU	16.112891 MMBTU	161.12891	0.000000016113	106,109,999,999,999,991,945,896,132,608 eV	106,110,000,000,000,007,201,619,968 keV	106,109,999,999,999,996,329,984 MeV
18 GJ	18,000,000,000 J	18,000,000 kJ	18,000 MJ	4,302,103,250 cal	4,302,103 kcal	4,302 Mcal	5,000,000 Wh	5,000 kWh	5 MWh	18,000,000,000 Ws	17,060,708 BTU	17.060708 MMBTU	170.607082	0.000000017061	112,349,999,999,999,991,720,947,220,480 eV	112,349,999,999,999,996,531,310,592 keV	112,350,000,000,000,004,718,592 MeV
19 GJ	19,000,000,000 J	19,000,000 kJ	19,000 MJ	4,541,108,987 cal	4,541,109 kcal	4,541 Mcal	5,277,778 Wh	5,278 kWh	5.277778 MWh	19,000,000,000 Ws	18,008,525 BTU	18.008525 MMBTU	180.085253	0.000000018009	118,589,999,999,999,991,495,998,308,352 eV	118,590,000,000,000,003,040,870,400 keV	118,589,999,999,999,996,329,984 MeV
20 GJ	20,000,000,000 J	20,000,000 kJ	20,000 MJ	4,780,114,723 cal	4,780,115 kcal	4,780 Mcal	5,555,556 Wh	5,556 kWh	5.555556 MWh	20,000,000,000 Ws	18,956,342 BTU	18.956342 MMBTU	189.563424	0.000000018956	124,829,999,999,999,991,271,049,396,224 eV	124,829,999,999,999,992,370,561,024 keV	124,830,000,000,000,004,718,592 MeV