A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
Terajoules to Ergs
Convert Terajoule (TJ) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Energy calculator
Energy Converter
Convert terajoules (TJ) to ergs (erg) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
erg = TJ × 1.000000000e+19
Results update instantly for Terajoules to Ergs conversions.
Reserved above the conversion cards and below the converter.
Formula
erg = TJ × 1.000000000e+19
TJ = erg × 1.000000000e-19
Conversion table
| 1 TJ | 1.000000e+19 erg |
| 5 TJ | 5.000000e+19 erg |
| 10 TJ | 1.000000e+20 erg |
| 20 TJ | 2.000000e+20 erg |
| 50 TJ | 5.000000e+20 erg |
| 100 TJ | 1.000000e+21 erg |
| 500 TJ | 5.000000e+21 erg |
| 1000 TJ | 1.000000e+22 erg |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both terajoule and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in terajoules by 1.000000000e+19 to get ergs. To reverse the conversion, multiply a erg value by 1.000000000e-19 to get back to terajoules.
Frequently asked questions
What is Terajoule (TJ)?
A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
What is Erg (erg)?
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
How do I convert terajoules to ergs?
Multiply the terajoule value by 1.000000000e+19 to get the equivalent in ergs. For example, 5 TJ × 1.000000000e+19 = 5.000000e+19 erg.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+19 is an exact, non-rounded value.
Can I convert ergs back to terajoules?
Yes. Divide the erg value by 1.000000000e+19, or multiply it by 1.000000000e-19, to get terajoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting terajoules to ergs
A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix. An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Use this calculator to move between terajoules and ergs accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.