Decijoule is 0.1 joule units.
Decijoules to Megajoules Converter — dJ to MJ
Convert Decijoule (dJ) to Megajoule (MJ) using the exact conversion factor (1 decijoule = 1e-7 megajoule). See the formula, worked examples, and conversion table.
Decijoules to Megajoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Megajoule is 1000000 joule units.
Result = input x 0.1 / 1e+6.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Decijoules to Megajoules
Decijoule and Megajoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Decijoule is 0.1 joule units, and megajoule is 1000000 joule units.
Formula
megajoules = decijoules × 1e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 decijoule equals 0.1 base units, and 1 megajoule equals 1000000 base units, so dividing one by the other gives the direct decijoule-to-megajoule factor of 1e-7.
Simple example
1 dJ × 1e-7 = 1e-7 MJ
1 decijoule = 1e-7 megajoules.
Real-world example
100 dJ × 1e-7 = 0.00001 MJ
100 decijoules = 0.00001 megajoules.
Conversion table
| Decijoule (dJ) | Megajoule (MJ) |
|---|---|
| 1 dJ | 1e-7 MJ |
| 10 dJ | 0.000001 MJ |
| 100 dJ | 0.00001 MJ |
| 500 dJ | 0.00005 MJ |
| 1,000 dJ | 0.0001 MJ |
| 2,000 dJ | 0.0002 MJ |
Reverse conversion: Megajoule to Decijoule
1e-7 MJ × 10000000 = 1 dJ
1e-7 megajoules = 1 decijoules.
decijoules = megajoules × 10000000
For a page dedicated to this direction, see Megajoule to Decijoule.
Understanding the Decijoule (dJ)
Decijoule is 0.1 joule units.
Understanding the Megajoule (MJ)
Megajoule is 1000000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megajoules are in 1 decijoule?
1 decijoule equals 1e-7 megajoules, using the exact defined conversion factor rather than an estimate.
How do I convert decijoule to megajoule?
Multiply the decijoule value by 1e-7. The converter above does this instantly to whatever precision you set.
How do I convert megajoule back to decijoule?
Use the reverse factor: 1 megajoule equals 10,000,000 decijoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a decijoule?
Decijoule (dJ) is a unit of energy.
What is a megajoule?
Megajoule (MJ) is a unit of energy.
Is the decijoule to megajoule conversion exact?
Yes. Both decijoule and megajoule are defined by fixed standards rather than physical artifacts, so the factor of 1e-7 used above is exact to as many digits as you choose to display.