Convert joules to megajoules
1 J = 0.000001 MJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.000 001MJ
As a fraction: 1/1000000
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1 J = 0.000001 MJ
Show this value in all 39 energy & work units
- Petajoules PJ 1e-15
- Terajoules TJ 1e-12
- Gigajoules GJ 1e-9
- Megajoules MJ 0.000 001
- Kilojoules kJ 0.001
- Joules J 1
- Millijoules mJ 1000
- Microjoules µJ 1 000 000
- Nanojoules nJ 1 000 000 000
- Watt-hours Wh 0.000 277 777 777 778
- Kilowatt-hours kWh 0.000 000 277 777 777 778
- Megawatt-hours MWh 2.77777777778e-10
- Gigawatt-hours GWh 2.77777777778e-13
- Terawatt-hours TWh 2.77777777778e-16
- Calorie (thermochemical)s cal 0.239 005 736 138
- Kilocalories kcal 0.000 239 005 736 138
- Calorie (IT)s cal (IT) 0.238 845 896 627
- Kilocalorie (IT)s kcal (IT) 0.000 238 845 896 627
- British thermal units BTU 0.000 947 817 120 313
- BTU (thermochemical)s BTU (th) 0.000 948 451 652 677
- Million BTUs MMBTU 9.47817120313e-10
- Therm (US)s thm 9.48043427973e-9
- Therm (EC)s thm (EC) 9.47816987913e-9
- Electronvolts eV 6.24150907446e+18
- Kiloelectronvolts keV 6 241 509 074 460 000
- Megaelectronvolts MeV 6 241 509 074 460
- Gigaelectronvolts GeV 6 241 509 074.46
- Teraelectronvolts TeV 6 241 509.074 46
- Ergs erg 10 000 000
- Foot-pounds ft·lbf 0.737 562 149 277
- Inch-pounds in·lbf 8.850 745 791 33
- Foot-poundals ft·pdl 23.730 360 404 2
- Horsepower-hours hp·h 0.000 000 372 506 135 999
- Tonne of TNTs t TNT 2.39005736138e-10
- Kiloton of TNTs kt TNT 2.39005736138e-13
- Megaton of TNTs Mt TNT 2.39005736138e-16
- Hartrees Eₕ 2.2937122784e+17
- Rydbergs Ry 4.58742455679e+17
- Quads quad 9.47817120313e-19
Every row is Joule (J) converted through the joule, in exact rational arithmetic.
How to convert joules to megajoules
Multiply the number of joules by 0.000001 to get megajoules.
The exact factor is 0.000001 — as a fraction, 1/1000000.
Joule to Megajoule conversion table
| Joules (J) | Megajoules (MJ) |
|---|---|
| 1 J | 0.000 001 |
| 2 J | 0.000 002 |
| 3 J | 0.000 003 |
| 5 J | 0.000 005 |
| 10 J | 0.000 01 |
| 20 J | 0.000 02 |
| 25 J | 0.000 025 |
| 50 J | 0.000 05 |
| 100 J | 0.0001 |
| 250 J | 0.000 25 |
| 500 J | 0.0005 |
| 1000 J | 0.001 |
Megajoule to Joule conversion table
| Megajoules (MJ) | Joules (J) |
|---|---|
| 1 MJ | 1 000 000 |
| 2 MJ | 2 000 000 |
| 3 MJ | 3 000 000 |
| 5 MJ | 5 000 000 |
| 10 MJ | 10 000 000 |
| 20 MJ | 20 000 000 |
| 25 MJ | 25 000 000 |
| 50 MJ | 50 000 000 |
| 100 MJ | 100 000 000 |
| 250 MJ | 250 000 000 |
| 500 MJ | 500 000 000 |
| 1000 MJ | 1 000 000 000 |
Frequently asked
How many megajoules are in a joule?
One joule equals 0.000001 megajoules (J → MJ). That figure is exact, not rounded.
How do you convert joules to megajoules?
Multiply the number of joules by 0.000001 to get megajoules.
What is 1 MJ in joules?
One megajoule is 1000000 joules.
What is 10 J in MJ?
10 J = 0.000 01 MJ.