Convert Coulombs to Elementary charge
Convert Coulombs (C) to Elementary charge (e) instantly and accurately.
Conversion Formula
e = C × 6.241509074e+18
About Coulombs
The coulomb (C) is the SI derived unit of electric charge, equal to the charge transported by a current of 1 A in 1 s. In the 2019 SI revision it is fixed exactly via the elementary charge: 1 C = 1 / (1.602 176 634 × 10⁻¹⁹) e ≈ 6.241 × 10¹⁸ e. Practical benchmarks: a 1 Ah battery stores 3 600 C; a lightning bolt transfers 1-20 C.
About Elementary charge
The elementary charge (e) is the magnitude of charge on a single proton or electron, defined exactly as 1.602 176 634 × 10⁻¹⁹ C in the 2019 SI revision. It is the quantum of electric charge - the smallest freely occurring charge in nature - and underpins all atomic and subatomic physics. A current of 1 A corresponds to 6.241 509 × 10¹⁸ elementary charges flowing per second.
Quick Reference Table
| Coulombs (C) | Elementary charge (e) |
|---|---|
| 1 C | 6.242 × 1018 e |
| 2 C | 1.248 × 1019 e |
| 5 C | 3.121 × 1019 e |
| 10 C | 6.242 × 1019 e |
| 25 C | 1.56 × 1020 e |
| 50 C | 3.121 × 1020 e |
| 100 C | 6.242 × 1020 e |