Convert Ampere-hour to Coulomb
Live bidirectional calculator for Ampere-hours (Ah) and Coulombs (C) with verified formula and conversion charts.
Electric Charge8 units
How the Calculation Works (Linear Scaling)
Since 1 Ampere-hour = 3600 Coulombs, multiply the value in Ampere-hours by 3600.
Ampere-hour to Coulomb Conversion Table
Precomputed values for quick reference and printing.
| Ampere-hour | Coulomb |
|---|---|
| 1 Ah | 3600 C |
| 2 Ah | 7200 C |
| 3 Ah | 10800 C |
| 4 Ah | 14400 C |
| 5 Ah | 18000 C |
| 6 Ah | 21600 C |
| 7 Ah | 25200 C |
| 8 Ah | 28800 C |
| 9 Ah | 32400 C |
| 10 Ah | 36000 C |
| 15 Ah | 54000 C |
| 20 Ah | 72000 C |
| 25 Ah | 90000 C |
| 30 Ah | 108000 C |
| 40 Ah | 144000 C |
| 50 Ah | 180000 C |
| 75 Ah | 270000 C |
| 100 Ah | 360000 C |
| Coulomb | Ampere-hour |
|---|---|
| 1 C | 0.0003 Ah |
| 2 C | 0.0006 Ah |
| 3 C | 0.0008 Ah |
| 4 C | 0.0011 Ah |
| 5 C | 0.0014 Ah |
| 6 C | 0.0017 Ah |
| 7 C | 0.0019 Ah |
| 8 C | 0.0022 Ah |
| 9 C | 0.0025 Ah |
| 10 C | 0.0028 Ah |
| 15 C | 0.0042 Ah |
| 20 C | 0.0056 Ah |
| 25 C | 0.0069 Ah |
| 30 C | 0.0083 Ah |
| 40 C | 0.0111 Ah |
| 50 C | 0.0139 Ah |
| 75 C | 0.0208 Ah |
| 100 C | 0.0278 Ah |
๐ Standard Benchmark Reference Values
Standard battery capacity definition (1 ampere continuously for 3,600 seconds).
Exact RatioAbout Ampere-hour (Ah)
Unit of electric charge equal to the charge transferred by a steady current of one ampere flowing for one hour (3,600 C).
History: Long-standing international electrical industry standard for electrochemical battery energy storage capacity.
Common Uses: Automotive lead-acid battery capacity, deep-cycle solar storage, and marine battery ratings.
About Coulomb (C)
The SI base unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere (1 C = 1 Aยทs).
History: Named after French physicist Charles-Augustin de Coulomb who formulated Coulombโs law of electrostatic force in 1785.
Common Uses: Standard measure of electrostatic charge, capacitor stored charge (Q = CV), and chemical electroplating.
โ Frequently Asked Questions
How many Coulombs are in 1 Ampere-hour?
There are exactly 3600 Coulombs in 1 Ampere-hour (1 Ah = 3600 C).
What is the formula to convert Ampere-hour to Coulomb?
The formula is: Coulomb = Ampere-hour ร 3600. Since 1 Ampere-hour = 3600 Coulombs, multiply the value in Ampere-hours by 3600.
How do I convert 1 Ah to C manually?
To convert 1 Ah to C: apply the formula Coulomb = Ampere-hour ร 3600. Substituting gives: 1 ร 3600 = 3600 C.