Coulombs to Milliamp-hours
Snapshot
1 Coulomb equals 0.277778 Milliamp-hours. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.
- Reference basis: This conversion uses a fixed factor based on exact coulomb-based charge definitions.
- Example: For 10 Coulombs, the result equals 2.778 Milliamp-hours.
- Use the reverse page if you need the opposite direction with the same basis.
Use the interactive calculator below for custom values and the common-value table for quick checks.
Converter Calculator
0.277778 Milliamp-hours (mAh)
SwitchExplanation
Formula: Milliamp-hours = Coulombs × 0.277778. Why: SI charge units such as coulombs and their prefixes are exact, so the calculator normalizes through coulombs before applying the target battery-charge unit.
Coulombs (C): the SI unit of electric charge.
Milliamp-hours (mAh): a common battery-capacity unit used for phones, wearables, power banks, and small battery packs.
This route is useful when translating battery-style capacity values into SI charge units for engineering, calculation, and reference work.
This conversion is purely multiplicative because both units reduce through coulombs using exact SI charge definitions with no offset.
Common Conversion Values
| Coulombs (C) | Milliamp-hours (mAh) |
|---|---|
| 1 | 0.277778 |
| 10 | 2.778 |
| 100 | 27.778 |
| 500 | 138.889 |
| 1,000 | 277.778 |
| 5,000 | 1,388.89 |
| 10,000 | 2,777.78 |
| 20,000 | 5,555.56 |
Frequently Asked Questions
How is Coulombs to Milliamp-hours calculated?
The factor is derived by reducing both units to coulombs, using the exact relationship 1 amp-hour = 3600 coulombs together with fixed SI prefix scaling where needed.
Is there a reverse page for Milliamp-hours to Coulombs?
Yes. Use the mirror Milliamp-hours to Coulombs page to apply the inverse relationship with the same exact charge basis.
Does this Coulombs to Milliamp-hours page convert charge only, not watt-hours?
Yes. This page converts charge-to-charge units only. Converting to watt-hours also requires a voltage assumption.