Convert kilowatt-hours to megajoules
1 kWh = 3.6 MJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
3.6MJ
As a fraction: 18/5
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1 kWh = 3.6 MJ
Show this value in all 39 energy & work units
- Petajoules PJ 3.6e-9
- Terajoules TJ 0.000 003 6
- Gigajoules GJ 0.0036
- Megajoules MJ 3.6
- Kilojoules kJ 3600
- Joules J 3 600 000
- Millijoules mJ 3 600 000 000
- Microjoules µJ 3 600 000 000 000
- Nanojoules nJ 3 600 000 000 000 000
- Watt-hours Wh 1000
- Kilowatt-hours kWh 1
- Megawatt-hours MWh 0.001
- Gigawatt-hours GWh 0.000 001
- Terawatt-hours TWh 1e-9
- Calorie (thermochemical)s cal 860 420.650 096
- Kilocalories kcal 860.420 650 096
- Calorie (IT)s cal (IT) 859 845.227 859
- Kilocalorie (IT)s kcal (IT) 859.845 227 859
- British thermal units BTU 3412.141 633 13
- BTU (thermochemical)s BTU (th) 3414.425 949 64
- Million BTUs MMBTU 0.003 412 141 633 13
- Therm (US)s thm 0.034 129 563 407
- Therm (EC)s thm (EC) 0.034 121 411 564 9
- Electronvolts eV 2.24694326681e+25
- Kiloelectronvolts keV 2.24694326681e+22
- Megaelectronvolts MeV 2.24694326681e+19
- Gigaelectronvolts GeV 2.24694326681e+16
- Teraelectronvolts TeV 22 469 432 668 100
- Ergs erg 36 000 000 000 000
- Foot-pounds ft·lbf 2 655 223.7374
- Inch-pounds in·lbf 31 862 684.8488
- Foot-poundals ft·pdl 85 429 297.4552
- Horsepower-hours hp·h 1.341 022 089 6
- Tonne of TNTs t TNT 0.000 860 420 650 096
- Kiloton of TNTs kt TNT 0.000 000 860 420 650 096
- Megaton of TNTs Mt TNT 8.60420650096e-10
- Hartrees Eₕ 8.25736420223e+23
- Rydbergs Ry 1.65147284045e+24
- Quads quad 3.41214163313e-12
Every row is Kilowatt-hour (kWh) converted through the joule, in exact rational arithmetic.
How to convert kilowatt-hours to megajoules
Multiply the number of kilowatt-hours by 3.6 to get megajoules.
The exact factor is 3.6 — as a fraction, 18/5.
Kilowatt-hour: How electricity is billed everywhere.
Kilowatt-hour to Megajoule conversion table
| Kilowatt-hours (kWh) | Megajoules (MJ) |
|---|---|
| 1 kWh | 3.6 |
| 2 kWh | 7.2 |
| 3 kWh | 10.8 |
| 5 kWh | 18 |
| 10 kWh | 36 |
| 20 kWh | 72 |
| 25 kWh | 90 |
| 50 kWh | 180 |
| 100 kWh | 360 |
| 250 kWh | 900 |
| 500 kWh | 1800 |
| 1000 kWh | 3600 |
Megajoule to Kilowatt-hour conversion table
| Megajoules (MJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 MJ | 0.277 777 78 |
| 2 MJ | 0.555 555 56 |
| 3 MJ | 0.833 333 33 |
| 5 MJ | 1.388 888 9 |
| 10 MJ | 2.777 777 8 |
| 20 MJ | 5.555 555 6 |
| 25 MJ | 6.944 444 4 |
| 50 MJ | 13.888 889 |
| 100 MJ | 27.777 778 |
| 250 MJ | 69.444 444 |
| 500 MJ | 138.888 89 |
| 1000 MJ | 277.777 78 |
Frequently asked
How many megajoules are in a kilowatt-hour?
One kilowatt-hour equals 3.6 megajoules (kWh → MJ). That figure is exact, not rounded.
How do you convert kilowatt-hours to megajoules?
Multiply the number of kilowatt-hours by 3.6 to get megajoules.
What is 1 MJ in kilowatt-hours?
One megajoule is 0.2777777778 kilowatt-hours.
What is 10 kWh in MJ?
10 kWh = 36 MJ.
What exactly is a kilowatt-hour?
How electricity is billed everywhere.