Coulomb (C)
The coulomb (C) is the SI unit of electric charge — one ampere of current for one second (A·s).
Coulombs quantify capacitor charge, electrostatic charge transfer, and total charge moved in a circuit over time.
Coulomb to Elementary Charge
Convert coulomb to elementary charge instantly. Type in either field — results update live.
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charge Coulomb Elementary Charge
1 coulomb = 6,241,509,074,460,763,000 elementary charges
Unit
Unit
Conversion table
Selected C values converted to e using the exact factor from this tool.
| C | e |
|---|---|
| 0.01 | 62,415,090,744,607,630 |
| 0.1 | 624,150,907,446,076,300 |
| 1 | 6,241,509,074,460,763,000 |
| 2 | 12,483,018,148,921,526,000 |
| 3 | 18,724,527,223,382,290,000 |
| 5 | 31,207,545,372,303,815,000 |
| 10 | 62,415,090,744,607,630,000 |
| 20 | 124,830,181,489,215,260,000 |
| 50 | 312,075,453,723,038,200,000 |
| 100 | 624,150,907,446,076,400,000 |
| 1,000 | 6.241509e+21 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 C = 6.241509074e+18 e
1 e = 1.602176634e-19 C
To convert coulomb to elementary charge, multiply by 6.241509074e+18.
To convert elementary charge to coulomb, multiply by 1.602176634e-19.
Example: convert 10 C to e
10 × 6.241509074e+18 = 6.241509074e+19 e
About these units
Short background on the units used in this conversion.
Elementary Charge (e)
The elementary charge e equals exactly 1.602176634×10⁻¹⁹ coulomb — the magnitude of charge on a single proton or electron (2019 SI exact value).
Elementary charge is the quantum of charge in physics problems, semiconductor carrier counts, and chemistry stoichiometry.
Frequently asked questions
How many elementary charges are in one coulomb?
One coulomb equals 6,241,509,074,460,763,000 elementary charges. Multiply your coulombs value by 6,241,509,074,460,763,000 to convert to elementary charges.
What is the conversion formula?
e = C × 6,241,509,074,460,763,000The reverse is
C = e × 0.00000000000000000016, using the same exact factors as this converter.Is this Coulomb to Elementary Charge converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.