Coulomb to elementary charge

Reference table

How the conversion works

The input is converted into C using the source factor and offset, then into elementary charge. This keeps unit definitions consistent across the electric charge collection.

Definitions and sources

Factors are maintained in the versioned unit dataset. Output is rounded to your selected significant digits; calculation uses JavaScript double precision.

• https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b9
• https://www.bipm.org/en/publications/si-brochure

How to use this tool

1. Enter a finite numeric value in coulomb.
2. Choose the significant digits for your result.
3. Copy or download the result, including its formula.

Try this example

10

Accuracy and scope

Ampere-hours measure charge, not energy; converting to watt-hours requires voltage.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.