A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
Calories to Ergs
Convert Calorie (cal) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert calories (cal) 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 = cal × 41840000
Results update instantly for Calories to Ergs conversions.
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Formula
erg = cal × 41840000
cal = erg × 2.390057361e-08
Conversion table
| 1 cal | 4.184000e+07 erg |
| 5 cal | 2.092000e+08 erg |
| 10 cal | 4.184000e+08 erg |
| 20 cal | 8.368000e+08 erg |
| 50 cal | 2.092000e+09 erg |
| 100 cal | 4.184000e+09 erg |
| 500 cal | 2.092000e+10 erg |
| 1000 cal | 4.184000e+10 erg |
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How the formula works
Both calorie and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in calories by 41840000 to get ergs. To reverse the conversion, multiply a erg value by 2.390057361e-08 to get back to calories.
Frequently asked questions
What is Calorie (cal)?
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
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 calories to ergs?
Multiply the calorie value by 41840000 to get the equivalent in ergs. For example, 5 cal × 41840000 = 2.092000e+08 erg.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 41840000 is an exact, non-rounded value.
Can I convert ergs back to calories?
Yes. Divide the erg value by 41840000, or multiply it by 2.390057361e-08, to get calories.
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About converting calories to ergs
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C. 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 calories 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.