An erg is a CGS energy unit.
Ergs to Picojoules Converter — erg to pJ
Convert Erg (erg) to Picojoule (pJ) using the exact conversion factor (1 erg = 100,000 picojoule). See the formula, worked examples, and conversion table.
Ergs to Picojoules 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.
Picojoule is 1e-12 joule units.
Result = input x 1e-7 / 1e-12.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Ergs to Picojoules
Erg and Picojoule 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 picojoule is 1e-12 joule units.
Formula
picojoules = ergs × 100000
This factor comes from each unit's defined relationship to the category's base unit: 1 erg equals 1e-7 base units, and 1 picojoule equals 1e-12 base units, so dividing one by the other gives the direct erg-to-picojoule factor of 100000.
Simple example
1 erg × 100000 = 100,000 pJ
1 erg = 100,000 picojoules.
Real-world example
100 erg × 100000 = 10,000,000 pJ
100 ergs = 10,000,000 picojoules.
Conversion table
| Erg (erg) | Picojoule (pJ) |
|---|---|
| 1 erg | 100,000 pJ |
| 10 erg | 1,000,000 pJ |
| 50 erg | 5,000,000 pJ |
| 100 erg | 10,000,000 pJ |
| 500 erg | 50,000,000 pJ |
| 1,000 erg | 100,000,000 pJ |
Reverse conversion: Picojoule to Erg
1 pJ × 0.00001 = 0.00001 erg
1 picojoule = 0.00001 ergs.
ergs = picojoules × 0.00001
For a page dedicated to this direction, see Picojoule to Erg.
Understanding the Erg (erg)
An erg is a CGS energy unit.
Understanding the Picojoule (pJ)
Picojoule is 1e-12 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many picojoules are in 1 erg?
1 erg equals 100,000 picojoules, using the exact defined conversion factor rather than an estimate.
How do I convert erg to picojoule?
Multiply the erg value by 100000. The converter above does this instantly to whatever precision you set.
How do I convert picojoule back to erg?
Use the reverse factor: 1 picojoule equals 0.00001 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 picojoule?
Picojoule (pJ) is a unit of engineering.
Is the erg to picojoule conversion exact?
Yes. Both erg and picojoule are defined by fixed standards rather than physical artifacts, so the factor of 100000 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.