Coulombs to Ampere-Hours converter (C to Ah)
Convert Coulombs (C) to Ampere-Hours (Ah) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
Convert Ampere-Hours to Coulombs ►
How to convert coulombs to ampere-hours
To convert coulombs (C) to ampere-hours (Ah), divide the value by 3,600.
Ah = C ÷ 3,600
One ampere-hour equals 3,600 coulombs (1 A × 3,600 s). Ampere-hours are commonly used to express battery capacity.
Example: Convert 7,200 C to Ah:
7,200 ÷ 3,600 = 2 Ah
What is a Coulombs?
The Coulombs (C) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Ampere-Hours?
The Ampere-Hours (Ah) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts electric charge from Coulombs into Ampere-Hours. One C equals 0.000277778 Ah.
Coulombs to Ampere-Hours conversion table
Common C values and the matching Ah result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Coulombs (C) | Ampere-Hours (Ah) |
|---|---|
| 1 C | 0.000277778 Ah |
| 60 C | 0.016666667 Ah |
| 360 C | 0.1 Ah |
| 1800 C | 0.5 Ah |
| 3600 C | 1 Ah |
| 7200 C | 2 Ah |
| 18000 C | 5 Ah |
| 36000 C | 10 Ah |
| 72000 C | 20 Ah |
How this calculator works
The form on this page is a Coulombs-to-Ampere-Hours converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the Ah result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many Ah are in 1 C?
1 C = 0.000277778 Ah.
How do I convert Coulombs to Ampere-Hours?
One ampere-hour equals 3,600 coulombs (1 A × 3,600 s). Ampere-hours are commonly used to express battery capacity.
Is this C to Ah converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.