Microjoule is 0.000001 joule units.
Microjoules to Ergs Converter — uJ to erg
Convert Microjoule (uJ) to Erg (erg) using the exact conversion factor (1 microjoule = 10 erg). See the formula, worked examples, and conversion table.
Microjoules to Ergs 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.
An erg is a CGS energy unit.
Result = input x 1e-6 / 1e-7.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Microjoules to Ergs
Microjoule and Erg both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Microjoule is 0.000001 joule units, and an erg is a CGS energy unit.
Formula
ergs = microjoules × 10
This factor comes from each unit's defined relationship to the category's base unit: 1 microjoule equals 0.000001 base units, and 1 erg equals 1e-7 base units, so dividing one by the other gives the direct microjoule-to-erg factor of 10.
Simple example
1 uJ × 10 = 10 erg
1 microjoule = 10 ergs.
Real-world example
100 uJ × 10 = 1,000 erg
100 microjoules = 1,000 ergs.
Conversion table
| Microjoule (uJ) | Erg (erg) |
|---|---|
| 1 uJ | 10 erg |
| 10 uJ | 100 erg |
| 100 uJ | 1,000 erg |
| 500 uJ | 5,000 erg |
| 1,000 uJ | 10,000 erg |
| 2,000 uJ | 20,000 erg |
Reverse conversion: Erg to Microjoule
10 erg × 0.1 = 1 uJ
10 ergs = 1 microjoule.
microjoules = ergs × 0.1
For a page dedicated to this direction, see Erg to Microjoule.
Understanding the Microjoule (uJ)
Microjoule is 0.000001 joule units.
Understanding the Erg (erg)
An erg is a CGS energy unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ergs are in 1 microjoule?
1 microjoule equals 10 ergs, using the exact defined conversion factor rather than an estimate.
How do I convert microjoule to erg?
Multiply the microjoule value by 10. The converter above does this instantly to whatever precision you set.
How do I convert erg back to microjoule?
Use the reverse factor: 1 erg equals 0.1 microjoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a microjoule?
Microjoule (uJ) is a unit of energy.
What is a erg?
Erg (erg) is a unit of energy.
Is the microjoule to erg conversion exact?
Yes. Both microjoule and erg are defined by fixed standards rather than physical artifacts, so the factor of 10 used above is exact to as many digits as you choose to display.