An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Ergs to Btu
Convert Erg (erg) to British thermal unit (BTU) instantly with an exact formula, conversion table, and FAQ.
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Convert ergs (erg) to btu (BTU) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
BTU = erg × 9.478171203e-11
Results update instantly for Ergs to Btu conversions.
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Formula
BTU = erg × 9.478171203e-11
erg = BTU × 10550558526
Conversion table
| 1 erg | 9.478171e-11 BTU |
| 5 erg | 4.739086e-10 BTU |
| 10 erg | 9.478171e-10 BTU |
| 20 erg | 1.895634e-09 BTU |
| 50 erg | 4.739086e-09 BTU |
| 100 erg | 9.478171e-09 BTU |
| 500 erg | 4.739086e-08 BTU |
| 1000 erg | 9.478171e-08 BTU |
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How the formula works
Both erg and british thermal unit measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in ergs by 9.478171203e-11 to get btu. To reverse the conversion, multiply a british thermal unit value by 10550558526 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 British thermal unit (BTU)?
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
How do I convert ergs to btu?
Multiply the erg value by 9.478171203e-11 to get the equivalent in btu. For example, 5 erg × 9.478171203e-11 = 4.739086e-10 BTU.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 9.478171203e-11 is an exact, non-rounded value.
Can I convert btu back to ergs?
Yes. Divide the british thermal unit value by 9.478171203e-11, or multiply it by 10550558526, to get ergs.
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About converting ergs to btu
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule. The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
Use this calculator to move between ergs and btu accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.