# Gigajoule Conversion Calculator

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

## 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

## Gigajoule Conversion Calculators

You can also convert energy using one of our gigajoule converters below.

Joules
Calories
Watts x Time
Thermal Units
Electronvolts

You might also find our other electrical calculators useful.

## References

1. National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion

Joules
Calories
Watts x Time
Thermal Units
Electronvolts