An erg is a CGS energy unit.
Ergs to Decijoules Converter — erg to dJ
Convert Erg (erg) to Decijoule (dJ) using the exact conversion factor (1 erg = 0.000001 decijoule). See the formula, worked examples, and conversion table.
Ergs to Decijoules 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.
Decijoule is 0.1 joule units.
Result = input x 1e-7 / 0.1.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Ergs to Decijoules
Erg and Decijoule 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: An erg is a CGS energy unit, and decijoule is 0.1 joule units.
Formula
decijoules = ergs × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 erg equals 1e-7 base units, and 1 decijoule equals 0.1 base units, so dividing one by the other gives the direct erg-to-decijoule factor of 0.000001.
Simple example
1 erg × 0.000001 = 0.000001 dJ
1 erg = 0.000001 decijoules.
Real-world example
100 erg × 0.000001 = 0.0001 dJ
100 ergs = 0.0001 decijoules.
Conversion table
| Erg (erg) | Decijoule (dJ) |
|---|---|
| 1 erg | 0.000001 dJ |
| 10 erg | 0.00001 dJ |
| 50 erg | 0.00005 dJ |
| 100 erg | 0.0001 dJ |
| 500 erg | 0.0005 dJ |
| 1,000 erg | 0.001 dJ |
Reverse conversion: Decijoule to Erg
0.000001 dJ × 1000000 = 1 erg
0.000001 decijoules = 1 erg.
ergs = decijoules × 1000000
For a page dedicated to this direction, see Decijoule to Erg.
Understanding the Erg (erg)
An erg is a CGS energy unit.
Understanding the Decijoule (dJ)
Decijoule is 0.1 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decijoules are in 1 erg?
1 erg equals 0.000001 decijoules, using the exact defined conversion factor rather than an estimate.
How do I convert erg to decijoule?
Multiply the erg value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert decijoule back to erg?
Use the reverse factor: 1 decijoule equals 1,000,000 ergs. You can also use the swap control in the converter above to flip the direction instantly.
What is a erg?
Erg (erg) is a unit of engineering.
What is a decijoule?
Decijoule (dJ) is a unit of engineering.
Is the erg to decijoule conversion exact?
Yes. Both erg and decijoule are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 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.