The coulomb (C) is the SI unit of electric charge, equal to the charge carried by a steady current of one ampere flowing for one second.
Coulombs to Exacoulombs
Convert Coulomb (C) to Exacoulomb (EC) instantly with an exact formula, conversion table, and FAQ.
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Convert coulombs (C) to exacoulombs (EC) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An Exacoulomb (EC) equals 1e+18 coulomb(s), a scaled unit of electric charge used for exa-scale electrical work.
EC = C × 1.000000e-18
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Formula
EC = C × 1.000000e-18
C = EC × 1.000000e+18
Conversion table
| 1 C | 1.000000e-18 EC |
| 5 C | 5.000000e-18 EC |
| 10 C | 1.000000e-17 EC |
| 20 C | 2.000000e-17 EC |
| 50 C | 5.000000e-17 EC |
| 100 C | 1.000000e-16 EC |
| 500 C | 5.000000e-16 EC |
| 1000 C | 1.000000e-15 EC |
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How the formula works
Both coulomb and exacoulomb measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in coulombs by 1.000000e-18 to get exacoulombs. To reverse the conversion, multiply a exacoulomb value by 1.000000e+18 to get back to coulombs.
Frequently asked questions
What is Coulomb (C)?
The coulomb (C) is the SI unit of electric charge, equal to the charge carried by a steady current of one ampere flowing for one second.
What is Exacoulomb (EC)?
An Exacoulomb (EC) equals 1e+18 coulomb(s), a scaled unit of electric charge used for exa-scale electrical work.
How do I convert coulombs to exacoulombs?
Multiply the coulomb value by 1.000000e-18 to get the equivalent in exacoulombs. For example, 5 C × 1.000000e-18 = 5.000000e-18 EC.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1.000000e-18 is an exact, non-rounded value.
Can I convert exacoulombs back to coulombs?
Yes. Divide the exacoulomb value by 1.000000e-18, or multiply it by 1.000000e+18, to get coulombs.
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About converting coulombs to exacoulombs
The coulomb (C) is the SI unit of electric charge, equal to the charge carried by a steady current of one ampere flowing for one second. An Exacoulomb (EC) equals 1e+18 coulomb(s), a scaled unit of electric charge used for exa-scale electrical work.
Use this calculator to move between coulombs and exacoulombs accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.