Picojoule is 1e-12 joule units.
Picojoules to Ergs Converter — pJ to erg
Convert Picojoule (pJ) to Erg (erg) using the exact conversion factor (1 picojoule = 0.00001 erg). See the formula, worked examples, and conversion table.
Picojoules to Ergs 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.
An erg is a CGS energy unit.
Result = input x 1e-12 / 1e-7.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Picojoules to Ergs
Picojoule and Erg 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: Picojoule is 1e-12 joule units, and an erg is a CGS energy unit.
Formula
ergs = picojoules × 0.00001
This factor comes from each unit's defined relationship to the category's base unit: 1 picojoule equals 1e-12 base units, and 1 erg equals 1e-7 base units, so dividing one by the other gives the direct picojoule-to-erg factor of 0.00001.
Simple example
1 pJ × 0.00001 = 0.00001 erg
1 picojoule = 0.00001 ergs.
Real-world example
100 pJ × 0.00001 = 0.001 erg
100 picojoules = 0.001 ergs.
Conversion table
| Picojoule (pJ) | Erg (erg) |
|---|---|
| 1 pJ | 0.00001 erg |
| 10 pJ | 0.0001 erg |
| 50 pJ | 0.0005 erg |
| 100 pJ | 0.001 erg |
| 500 pJ | 0.005 erg |
| 1,000 pJ | 0.01 erg |
Reverse conversion: Erg to Picojoule
0.00001 erg × 100000 = 1 pJ
0.00001 ergs = 1 picojoule.
picojoules = ergs × 100000
For a page dedicated to this direction, see Erg to Picojoule.
Understanding the Picojoule (pJ)
Picojoule is 1e-12 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 picojoule?
1 picojoule equals 0.00001 ergs, using the exact defined conversion factor rather than an estimate.
How do I convert picojoule to erg?
Multiply the picojoule value by 0.00001. The converter above does this instantly to whatever precision you set.
How do I convert erg back to picojoule?
Use the reverse factor: 1 erg equals 100,000 picojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a picojoule?
Picojoule (pJ) is a unit of engineering.
What is a erg?
Erg (erg) is a unit of engineering.
Is the picojoule to erg conversion exact?
Yes. Both picojoule and erg 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.