39 units · base unit J · M L² T⁻²

Energy & work converter

Energy spans 45 orders of magnitude here, from the electronvolt to the megaton. Every factor except the two CODATA atomic values is exact.

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1000MJ

✓ Exact 1 GJ = 1000 MJ

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Significant digits 12 Round to Notation 1 GJ = 1000 MJ

Show this value in all 39 energy & work units

Petajoules PJ 0.000 001
Terajoules TJ 0.001
Gigajoules GJ 1
Megajoules MJ 1000
Kilojoules kJ 1 000 000
Joules J 1 000 000 000
Millijoules mJ 1 000 000 000 000
Microjoules µJ 1 000 000 000 000 000
Nanojoules nJ 1e+18
Watt-hours Wh 277 777.777 778
Kilowatt-hours kWh 277.777 777 778
Megawatt-hours MWh 0.277 777 777 778
Gigawatt-hours GWh 0.000 277 777 777 778
Terawatt-hours TWh 0.000 000 277 777 777 778
Calorie (thermochemical)s cal 239 005 736.138
Kilocalories kcal 239 005.736 138
Calorie (IT)s cal (IT) 238 845 896.627
Kilocalorie (IT)s kcal (IT) 238 845.896 627
British thermal units BTU 947 817.120 313
BTU (thermochemical)s BTU (th) 948 451.652 677
Million BTUs MMBTU 0.947 817 120 313
Therm (US)s thm 9.480 434 279 73
Therm (EC)s thm (EC) 9.478 169 879 13
Electronvolts eV 6.24150907446e+27
Kiloelectronvolts keV 6.24150907446e+24
Megaelectronvolts MeV 6.24150907446e+21
Gigaelectronvolts GeV 6.24150907446e+18
Teraelectronvolts TeV 6 241 509 074 460 000
Ergs erg 1e+16
Foot-pounds ft·lbf 737 562 149.277
Inch-pounds in·lbf 8 850 745 791.33
Foot-poundals ft·pdl 23 730 360 404.2
Horsepower-hours hp·h 372.506 135 999
Tonne of TNTs t TNT 0.239 005 736 138
Kiloton of TNTs kt TNT 0.000 239 005 736 138
Megaton of TNTs Mt TNT 0.000 000 239 005 736 138
Hartrees Eₕ 2.2937122784e+26
Rydbergs Ry 4.58742455679e+26
Quads quad 9.47817120313e-10

Every row is Gigajoule (GJ) converted through the joule, in exact rational arithmetic.

Common energy & work conversions

All energy & work units

Each unit expressed in joules (J), the unit everything in this category converts through.

Unit	Symbol	System	Value in J
Petajoule	PJ	metric	1000000000000000
Terajoule	TJ	metric	1000000000000
Gigajoule	GJ	metric	1000000000
Megajoule	MJ	metric	1000000
Kilojoule	kJ	metric	1000
Joule	J	SI	1
Millijoule	mJ	metric	0.001
Microjoule	µJ	metric	0.000001
Nanojoule	nJ	metric	0.000000001
Watt-hour	Wh	metric	3600
Kilowatt-hour	kWh	metric	3600000
Megawatt-hour	MWh	metric	3600000000
Gigawatt-hour	GWh	metric	3600000000000
Terawatt-hour	TWh	metric	3600000000000000
Calorie (thermochemical)	cal	metric	4.184
Kilocalorie	kcal	metric	4184
Calorie (IT)	cal (IT)	metric	4.1868
Kilocalorie (IT)	kcal (IT)	metric	4186.8
British thermal unit	BTU	imperial	1055.05585262
BTU (thermochemical)	BTU (th)	imperial	1054.35
Million BTU	MMBTU	us	1055055852.62
Therm (US)	thm	us	105480400
Therm (EC)	thm (EC)	other	105505600
Electronvolt	eV	atomic	0.0000000000000000001602176634
Kiloelectronvolt	keV	atomic	0.0000000000000001602176634
Megaelectronvolt	MeV	atomic	0.0000000000001602176634
Gigaelectronvolt	GeV	atomic	0.0000000001602176634
Teraelectronvolt	TeV	atomic	0.0000001602176634
Erg	erg	cgs	0.0000001
Foot-pound	ft·lbf	imperial	1.35581794833
Inch-pound	in·lbf	imperial	0.112984829028
Foot-poundal	ft·pdl	imperial	0.0421401100938
Horsepower-hour	hp·h	imperial	2684519.5377
Tonne of TNT	t TNT	other	4184000000
Kiloton of TNT	kt TNT	other	4184000000000
Megaton of TNT	Mt TNT	other	4184000000000000
Hartree	Eₕ	atomic	0.00000000000000000435974472221
Rydberg	Ry	atomic	0.0000000000000000021798723611
Quad	quad	us	1055055852620000000

About energy & work units

Convert joules, kilowatt-hours, calories, BTU, electronvolts, therms and tonnes of TNT.

Energy spans 45 orders of magnitude here, from the electronvolt to the megaton. Every factor except the two CODATA atomic values is exact.

Dimensional formula: M L² T⁻². Every conversion on this page goes through the joule, using exact fractions rather than decimal approximations. Read how that works →