Decajoule is 10 joule units.
Decajoules to Megajoules Converter — daJ to MJ
Convert Decajoule (daJ) to Megajoule (MJ) using the exact conversion factor (1 decajoule = 0.00001 megajoule). See the formula, worked examples, and conversion table.
Decajoules to Megajoules converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Megajoule is 1000000 joule units.
Result = input x 10 / 1e+6.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Decajoules to Megajoules
Decajoule and Megajoule both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Decajoule is 10 joule units, and megajoule is 1000000 joule units.
Formula
megajoules = decajoules × 0.00001
This factor comes from each unit's defined relationship to the category's base unit: 1 decajoule equals 10 base units, and 1 megajoule equals 1000000 base units, so dividing one by the other gives the direct decajoule-to-megajoule factor of 0.00001.
Simple example
1 daJ × 0.00001 = 0.00001 MJ
1 decajoule = 0.00001 megajoules.
Real-world example
100 daJ × 0.00001 = 0.001 MJ
100 decajoules = 0.001 megajoules.
Conversion table
| Decajoule (daJ) | Megajoule (MJ) |
|---|---|
| 1 daJ | 0.00001 MJ |
| 10 daJ | 0.0001 MJ |
| 50 daJ | 0.0005 MJ |
| 100 daJ | 0.001 MJ |
| 500 daJ | 0.005 MJ |
| 1,000 daJ | 0.01 MJ |
Reverse conversion: Megajoule to Decajoule
0.00001 MJ × 100000 = 1 daJ
0.00001 megajoules = 1 decajoule.
decajoules = megajoules × 100000
For a page dedicated to this direction, see Megajoule to Decajoule.
Understanding the Decajoule (daJ)
Decajoule is 10 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 decajoule?
1 decajoule equals 0.00001 megajoules, using the exact defined conversion factor rather than an estimate.
How do I convert decajoule to megajoule?
Multiply the decajoule value by 0.00001. The converter above does this instantly to whatever precision you set.
How do I convert megajoule back to decajoule?
Use the reverse factor: 1 megajoule equals 100,000 decajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a decajoule?
Decajoule (daJ) is a unit of engineering.
What is a megajoule?
Megajoule (MJ) is a unit of engineering.
Is the decajoule to megajoule conversion exact?
Yes. Both decajoule and megajoule are defined by fixed standards rather than physical artifacts, so the factor of 0.00001 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.