Electric Charge Converter
Electric charge is the property of matter that makes it experience a force in an electric field. The SI unit is the coulomb, the charge carried by a current of one ampere in one second. Battery capacity is usually stated in ampere-hours or milliampere-hours, and 1 Ah equals 3,600 C.
1 Coulomb = 0.0002777777778 Ampere-hour
How to convert Coulomb to Ampere-hour
One Coulomb equals 0.0002777777778 Ampere-hour, so multiply any value in C by 0.0002777777778 to get Ah. To convert back, divide by 0.0002777777778 — or multiply by 3,600.
Ah = C × 0.0002777777778
Example: 25 C × 0.0002777777778 = 0.006944444444 Ah.
Coulomb to Ampere-hour table
| Coulomb (C) | Ampere-hour (Ah) |
|---|---|
| 1 | 0.0002777777778 |
| 2 | 0.0005555555556 |
| 3 | 0.0008333333333 |
| 4 | 0.001111111111 |
| 5 | 0.001388888889 |
| 10 | 0.002777777778 |
| 15 | 0.004166666667 |
| 20 | 0.005555555556 |
| 25 | 0.006944444444 |
| 50 | 0.01388888889 |
| 75 | 0.02083333333 |
| 100 | 0.02777777778 |
| 250 | 0.06944444444 |
| 500 | 0.1388888889 |
| 1,000 | 0.2777777778 |
Ampere-hour to Coulomb table
| Ampere-hour (Ah) | Coulomb (C) |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 10 | 36,000 |
| 15 | 54,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 75 | 270,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
Electric Charge units at a glance
All 12 units this converter supports, each expressed in Coulomb (C) and the other way round.
| Unit | Symbol | 1 unit in C | 1 C in unit |
|---|---|---|---|
| Coulomb | C | 1 | 1 |
| Megacoulomb | MC | 1,000,000 | 0.000001 |
| Kilocoulomb | kC | 1,000 | 0.001 |
| Millicoulomb | mC | 0.001 | 1,000 |
| Microcoulomb | µC | 0.000001 | 1,000,000 |
| Nanocoulomb | nC | 1e-9 | 1,000,000,000 |
| Picocoulomb | pC | 1e-12 | 1,000,000,000,000 |
| Ampere-hour | Ah | 3,600 | 0.0002777777778 |
| Milliampere-hour | mAh | 3.6 | 0.2777777778 |
| Abcoulomb (EMU) | abC | 10 | 0.1 |
| Statcoulomb (ESU) | statC | 3.335640952e-10 | 2,997,924,580 |
| Faraday | F | 96,485.33212 | 0.00001036426966 |
Where electric charge conversions are used
Battery capacity, electrochemistry, capacitor calculations, and electrostatics.
Frequently asked questions
What is 1 Coulomb in Ampere-hour?
1 Coulomb (C) is 0.0002777777778 Ampere-hour (Ah).
What is 1 Ampere-hour in Coulomb?
1 Ampere-hour (Ah) is 3,600 Coulomb (C).
How do I convert Coulomb to Ampere-hour?
Multiply the value in Coulomb by 0.0002777777778. For example, 5 C × 0.0002777777778 = 0.001388888889 Ah. To go the other way, divide by 0.0002777777778.
How many units does the electric charge converter support?
It converts between 12 units: Coulomb, Megacoulomb, Kilocoulomb, Millicoulomb, Microcoulomb, Nanocoulomb, Picocoulomb, Ampere-hour, Milliampere-hour, Abcoulomb (EMU), Statcoulomb (ESU), Faraday.
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Figures on this page are calculated with the same conversion factors as the converter above and shown to up to 10 significant figures. See our disclaimer before relying on a result in a professional or safety-critical context.