Convert coulombs to ampere-hours and ampere-hours to coulombs instantly. Bidirectional charge converter with formula and common values.
To convert coulombs to ampere-hours, divide by 3,600. This converts from the SI charge unit to the practical battery capacity unit.
| Coulombs (C) | Ampere-hours (Ah) |
|---|---|
| 360 | 0.1 |
| 1,800 | 0.5 |
| 3,600 | 1 |
| 5,400 | 1.5 |
| 9,000 | 2.5 |
| 18,000 | 5 |
| 360,000 | 100 |
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Divide the charge in coulombs by 3,600. For example, 5,400 C ÷ 3,600 = 1.5 Ah.
One hour contains 3,600 seconds. Since one coulomb equals one ampere-second, dividing by 3,600 converts ampere-seconds to ampere-hours.
This conversion is useful when calculating battery capacity from charge measurements, or when converting physics calculations (in coulombs) to practical battery units.
One coulomb is about the charge in a small camera flash capacitor. A typical smartphone battery holds roughly 10,000-15,000 coulombs (about 3-4 Ah).