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Electron Charge Converters

Convert between coulombs, electrons (elementary charges), faradays, and ampere-hours.

What this tool does

Convert between coulombs, electrons (elementary charges), faradays, and ampere-hours. Type an amount in coulombs, choose the units, and the tool converts it to elementary charges. It offers 9 electric charge units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one from 9 options, including Coulomb, Millicoulomb, Microcoulomb, Nanocoulomb, Picocoulomb, Elementary charge. Starts as Coulomb.
  • To: Choose one of the same 9 units as "From". Starts as Elementary charge.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from coulombs to elementary charges:

  • 1 C ≈ 6.24150907446 × 10¹⁸ e
  • 5 C ≈ 3.12075453723 × 10¹⁹ e
  • 10 C ≈ 6.24150907446 × 10¹⁹ e
  • 50 C ≈ 3.12075453723 × 10²⁰ e
  • 100 C ≈ 6.24150907446 × 10²⁰ e

Multiply the number of coulombs by about 6.24150907446 × 10¹⁸ to get elementary charges. The factor follows from exact definitions. It has more digits than fit here, so it is shown rounded.

Sources: Coulomb: SI Brochure, 9th edition (2019). Elementary charge: SI Brochure, 9th edition (2019).

Limitations

  • Counts charges as multiples of the elementary charge. It does not track the sign (positive or negative) of the charge.
  • Converts units of electric charge only. It does not turn charge into energy, because that also needs a voltage.

FAQs

Q: How many electrons make one coulomb?
A: About 6.2415 × 10¹⁸. An electron carries one elementary charge in size, which is exactly 1.602176634 × 10⁻¹⁹ coulomb.
Q: Is the charge of an electron the same as the elementary charge?
A: They have the same size. The electron charge is negative and the elementary charge is given as a positive amount, so this converter treats "electrons" and "elementary charges" as one unit and ignores the sign.
Q: How many coulombs is one faraday?
A: One faraday is the charge of one mole of electrons, about 96,485 coulombs.

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