Charge Converter
Convert electric charge between coulombs, ampere-hours and elementary charges.
Written by Rahman · Last reviewed
Quick answer
Electric charge is measured in coulombs, the charge carried by one ampere flowing for one second. One ampere-hour is 3,600 coulombs and one milliampere-hour is 3.6. The elementary charge on a single proton is 1.602 × 10⁻¹⁹ coulombs. Battery capacity is quoted in mAh, so a 3,000 mAh cell holds 10,800 coulombs.
| Coulomb (C) | 1 |
| Millicoulomb (mC) | 1000 |
| Microcoulomb (µC) | 1000000 |
| Nanocoulomb (nC) | 1000000000 |
| Kilocoulomb (kC) | 0.001 |
| Ampere-hour (Ah) | 0.0002777777778 |
| Milliampere-hour (mAh) | 0.2777777778 |
| Faraday (F) | 0.00001036426966 |
| Elementary charge (e) | 6.241509e+18 |
About the Charge Converter
Electric charge is a fundamental property of matter that causes it to experience a force in an electric field. The SI unit is the coulomb, while the ampere-hour is common for batteries.
This converter handles coulombs, ampere-hours and the elementary charge used in physics.
Frequently Asked Questions
What is the SI unit of electric charge?
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The SI unit is the coulomb (C), defined as the charge carried by a current of one ampere in one second.
What is an ampere-hour?
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An ampere-hour is the charge delivered by one ampere flowing for one hour, equal to 3,600 coulombs. Battery capacity is often rated in ampere-hours.
What is the elementary charge?
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The elementary charge is the charge of a single proton or electron, about 1.602 × 10⁻¹⁹ coulombs.