Convert ampere-hours to coulombs and coulombs to ampere-hours instantly. Bidirectional charge converter with formula and common values.
To convert ampere-hours to coulombs, multiply by 3,600. One ampere-hour is the charge transferred by a steady current of one ampere flowing for one hour (3,600 seconds).
| Ampere-hours (Ah) | Coulombs (C) |
|---|---|
| 0.1 | 360 |
| 0.5 | 1,800 |
| 1 | 3,600 |
| 2.5 | 9,000 |
| 5 | 18,000 |
| 12 | 43,200 |
| 100 | 360,000 |
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One ampere-hour equals 3,600 coulombs. This comes from 1 A × 3,600 seconds (one hour).
Multiply the charge in ampere-hours by 3,600. For example, 2.5 Ah × 3,600 = 9,000 C.
Ampere-hours are more practical for battery capacity. A 2.5 Ah battery can deliver 2.5 amperes for one hour, which is easier to understand than 9,000 coulombs.
Watt-hours equal ampere-hours multiplied by voltage (Wh = Ah × V). A 3.7 V battery rated at 2.5 Ah stores 9.25 Wh of energy.
No. The ampere-hour is a practical unit accepted for use with SI. The official SI unit of charge is the coulomb.