The coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). It’s used to measure the quantity of electric charge. One coulomb is defined as the amount of electric charge carried by a current of one ampere (A) flowing for one second. Mathematically, it can be expressed as:
1 Coulomb = 1 Ampere x 1 second
The charge of an electron is a fundamental physical constant that represents the basic unit of electric charge carried by an electron. Electrons have a negative charge, which is conventionally represented as “-e”. The elementary charge (e) is approximately equal to:
e ≈ -1.602176634 × 10-19 coulombs
1C = 6.24150975⋅1018e
or
1e = 1.60217646⋅10-19C
Q(e) = Q(C) × 6.24150975 x 1018
Example – Convert 3 coulombs to electron charge:
Ans. Q(e) = 3C × 6.24150975 x 1018 = 1.872 x 1019e
| Charge (coulomb) | Charge (electron charge) |
| 0 C | 0 e |
| 1 C | 6.24150975⋅1018 e |
| 10 C | 6.24150975⋅1019 e |
| 100 C | 6.24150975⋅1020 e |
| 1000 C | 6.24150975⋅1021 e |
| 10000 C | 6.24150975⋅1022 e |
| 100000 C | 6.24150975⋅1023 e |
| 1000000 C | 6.24150975⋅1024 e |
Coulombs can be converted to electrons by dividing the amount of charge in coulombs by the elementary charge, which is approximately 1.602 x 10^-19 coulombs per electron.
There are approximately 6.242 x 10^18 electrons in 1 coulomb of charge.
1 coulomb is equivalent to approximately 6.242 x 10^18 electrons.
The charge of 1 electron is approximately -1.602 x 10^-19 coulombs.
An electron carries a charge of approximately -1.602 x 10^-19 coulombs.
3 coulombs of charge is equivalent to a charge of approximately 1.8726 x 10^19 electrons.
There are approximately 2.4968 x 10^19 electrons in 4 coulombs of charge.
To convert a quantity of charge to coulombs, divide the charge value by the elementary charge (approximately 1.602 x 10^-19 coulombs per electron).