maratoolHow to convert mAh to coulombs (battery charge units)
Type a charge — read coulombs, Ah, mAh, or faradays instantly.
Battery specs use mAh, physics uses coulombs, and electrochemistry uses faradays. The Electric Charge Converter ties them together: 1 mAh = 3.6 C exactly.
How it works
- Pick units — "Milliampere-hour (mAh)" to "Coulomb (C)", or any other pair.
- Type a value — the result updates as you type, with swap and copy.
- Copy — one click, with "Copied!" feedback.
Electric charge conversion factors
Every unit converts through the coulomb (the base unit). To convert A → B, multiply by A's factor and divide by B's:
| Unit | = this many coulombs |
|---|---|
| Kilocoulomb (kC) | 1,000 |
| Coulomb (C) | 1 |
| Millicoulomb (mC) | 0.001 |
| Microcoulomb (µC) | 1.0000 × 10^-6 |
| Nanocoulomb (nC) | 1.0000 × 10^-9 |
| Ampere-hour (Ah) | 3,600 |
| Milliampere-hour (mAh) | 3.6 |
| Faraday (F) | 96,485.33212 |
| Abcoulomb (abC) | 10 |
| Statcoulomb (statC) | 3.3356 × 10^-10 |
When you need it
Charge tells you runtime, not energy: a 2,000 mAh cell delivers 2 A for one hour regardless of voltage, but the watt-hours depend on that voltage. Airlines limit lithium batteries by Wh — multiply Ah by nominal volts to check.
Sources & methodology
Conversion factors follow NIST Special Publication 811; exact-by-definition factors are marked in the tool itself. All math runs client-side in your browser — nothing is uploaded.
More conversion guides
- How to convert milliamps to amps (and other current units)
- How to convert µF, nF, and pF capacitor values
- How to convert calories, joules, kWh, and BTU
Or browse everything at once in the new unit & sizing converters roundup.