Convert ampere hour to coulomb instantly. Type in either field — results update live.
Selected Ah values converted to C using the exact factor from this tool.
| Ah | C |
|---|---|
| 0.01 | 36 |
| 0.1 | 360 |
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 5 | 18,000 |
| 10 | 36,000 |
| 20 | 72,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 1,000 | 3,600,000 |
Exact conversion factors in both directions, plus a worked example.
1 Ah = 3600 C
1 C = 0.0002777778 Ah
To convert ampere hour to coulomb, multiply by 3600.
To convert coulomb to ampere hour, multiply by 0.0002777778.
Example: convert 10 Ah to C
10 × 3600 = 36000 C
Short background on the units used in this conversion.
The ampere-hour (Ah) equals 3,600 coulombs — the standard battery-capacity unit. Milliampere-hours convert as mAh × 3.6 = coulomb.
Ampere-hours label phone batteries, EV packs, and any storage rated by how much current they deliver over time.
The coulomb (C) is the SI unit of electric charge — one ampere of current for one second (A·s).
Coulombs quantify capacitor charge, electrostatic charge transfer, and total charge moved in a circuit over time.
C = Ah × 3,600Ah = C × 0.00027777777778, using the same exact factors as this converter.