Ampere-hour to Coulomb Converter
1 ampere-hour is exactly 3600 coulombs. Convert ampere-hours (Ah) to coulombs (C) below: type a value and the result updates as you type.
Ah to C calculator
Result
Ampere-hour to Coulomb conversion
1 Ah = 3600 Cone ampere-hour in coulombs
1 C ≈ 0.0002777777778 Ahone coulomb in ampere-hours
Ampere-hour (Ah): The charge of one ampere flowing for one hour: exactly 3600 C. Car and storage batteries are rated in Ah.
Coulomb (C): SI unit of electric charge: the charge carried by a current of one ampere in one second.
Source:SI Brochure, 9th edition (BIPM, 2019)
How to convert ampere-hours to coulombs
To convert ampere-hours to coulombs, multiply the number of ampere-hours by 3600.
Formula
C = Ah × 3600
Examples
- 5 Ah = 5 × 3600 = 18000 C
- 25 Ah = 25 × 3600 = 90000 C
- 100 Ah = 100 × 3600 = 360000 C
Ampere-hour to Coulomb conversion table
| Ampere-hour (Ah) | Coulomb (C) |
|---|---|
| 0.1 Ah | 360 C |
| 0.5 Ah | 1800 C |
| 1 Ah | 3600 C |
| 2 Ah | 7200 C |
| 3 Ah | 10800 C |
| 5 Ah | 18000 C |
| 10 Ah | 36000 C |
| 20 Ah | 72000 C |
| 25 Ah | 90000 C |
| 50 Ah | 180000 C |
| 100 Ah | 360000 C |
| 250 Ah | 900000 C |
| 500 Ah | 1800000 C |
| 1000 Ah | 3600000 C |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many coulombs are in one ampere-hour?
- One ampere-hour is exactly 3600 coulombs.
- How do I convert coulombs to ampere-hours?
- To convert coulombs to ampere-hours, divide the number of coulombs by 3600. The formula is Ah = C ÷ 3600.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 3600 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a ampere-hour or a coulomb?
- A ampere-hour is 3600 times larger than a coulomb. In other words, a coulomb is exactly 1/3600 of a ampere-hour.