An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Ergs to Calories
Convert Erg (erg) to Calorie (cal) 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 ergs (erg) to calories (cal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
cal = erg × 2.390057361e-08
Results update instantly for Ergs to Calories conversions.
Reserved above the conversion cards and below the converter.
Formula
cal = erg × 2.390057361e-08
erg = cal × 41840000
Conversion table
| 1 erg | 2.390057e-08 cal |
| 5 erg | 1.195029e-07 cal |
| 10 erg | 2.390057e-07 cal |
| 20 erg | 4.780115e-07 cal |
| 50 erg | 0.000001 cal |
| 100 erg | 0.000002 cal |
| 500 erg | 0.000012 cal |
| 1000 erg | 0.000024 cal |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both erg and calorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in ergs by 2.390057361e-08 to get calories. To reverse the conversion, multiply a calorie value by 41840000 to get back to ergs.
Frequently asked questions
What is Erg (erg)?
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
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.
How do I convert ergs to calories?
Multiply the erg value by 2.390057361e-08 to get the equivalent in calories. For example, 5 erg × 2.390057361e-08 = 1.195029e-07 cal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 2.390057361e-08 is an exact, non-rounded value.
Can I convert calories back to ergs?
Yes. Divide the calorie value by 2.390057361e-08, or multiply it by 41840000, to get ergs.
Reserved between the FAQ and the article so the page stays balanced.
About converting ergs to calories
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule. 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.
Use this calculator to move between ergs and calories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.