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 Millicoulombs
Convert Coulomb (C) to Millicoulomb (mC) instantly with an exact formula, conversion table, and FAQ.
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Convert coulombs (C) to millicoulombs (mC) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A Millicoulomb (mC) equals 1/1,000 coulomb(s), a scaled unit of electric charge used for milli-scale electrical work.
mC = C × 1000
Results update instantly for Coulombs to Millicoulombs conversions.
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Formula
mC = C × 1000
C = mC × 0.001
Conversion table
| 1 C | 1000 mC |
| 5 C | 5000 mC |
| 10 C | 10000 mC |
| 20 C | 20000 mC |
| 50 C | 50000 mC |
| 100 C | 100000 mC |
| 500 C | 500000 mC |
| 1000 C | 1.000000e+06 mC |
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How the formula works
Both coulomb and millicoulomb measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in coulombs by 1000 to get millicoulombs. To reverse the conversion, multiply a millicoulomb value by 0.001 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 Millicoulomb (mC)?
A Millicoulomb (mC) equals 1/1,000 coulomb(s), a scaled unit of electric charge used for milli-scale electrical work.
How do I convert coulombs to millicoulombs?
Multiply the coulomb value by 1000 to get the equivalent in millicoulombs. For example, 5 C × 1000 = 5000 mC.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1000 is an exact, non-rounded value.
Can I convert millicoulombs back to coulombs?
Yes. Divide the millicoulomb value by 1000, or multiply it by 0.001, to get coulombs.
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About converting coulombs to millicoulombs
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. A Millicoulomb (mC) equals 1/1,000 coulomb(s), a scaled unit of electric charge used for milli-scale electrical work.
Use this calculator to move between coulombs and millicoulombs accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.