Convert coulombs and battery capacity units such as mAh and Ah.
Electric charge and battery capacity
The SI unit of electric charge is the coulomb (C): 1 C = 1 A·s. Battery capacity is given in milliampere-hours (mAh) or ampere-hours (Ah): 1 Ah = 3,600 C, 1 mAh = 3.6 C and 1 Ah = 1,000 mAh. Energy follows from the voltage: Wh = Ah × V.
Conversion factors
1 mAh = 3.6 C
1 C = 0.277778 mAh
One unit converted to all others: Milliampere-hour (mAh)
| Unit | Value |
|---|
| Microcoulomb (µC) | 3,600,000 |
| Millicoulomb (mC) | 3,600 |
| Coulomb (C) | 3.6 |
| Milliampere-hour (mAh) | 1 |
| Ampere-hour (Ah) | 0.001 |
Common values
| Milliampere-hour (mAh) | Coulomb (C) |
|---|
| 1 mAh | 3.6 C |
| 5 mAh | 18 C |
| 10 mAh | 36 C |
| 50 mAh | 180 C |
| 100 mAh | 360 C |
| Coulomb (C) | Milliampere-hour (mAh) |
|---|
| 1 C | 0.277778 mAh |
| 5 C | 1.38889 mAh |
| 10 C | 2.77778 mAh |
| 50 C | 13.8889 mAh |
| 100 C | 27.7778 mAh |
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