Electrical
A·htoC
Convert ampere-hours (A·h) to coulombs (C).
Factor1 A·h = 3600 C
Converter
A·h
Accepts numbers or expressions, e.g. 150 + 14.7
Result
C
Rendered to 6 significant figures.
Formula
Formula
C = A·h × 3600
Multiply any value in ampere-hours by 3600 to obtain the value in coulombs.
Worked example
Convert 1 A·h to C.
- 01Start with 1 A·h.
- 02Multiply by the conversion factor: 1 × 3600 = 3600 C.
Result1 A·h = 3600 C
Conversion table
| A·h | C |
|---|---|
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 50 | 1.8000e+5 |
| 100 | 3.6000e+5 |
| 200 | 7.2000e+5 |
| 500 | 1.8000e+6 |
| 1000 | 3.6000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from A·h to C?
1 A·h equals 3600 C. To convert, multiply the value in ampere-hours by 3600.
How do I convert 1 A·h to C?
1 A·h = 3600 C. For any value, multiply by 3600.
How do I convert C back to A·h?
Divide by the same factor — or equivalently, multiply by 0.0002777778. So 1 C = 0.000277778 A·h.
When would I need to convert ampere-hour to coulomb?
Electric-charge conversions between A·h and C appear in battery capacity specification (A·h, mA·h), electroplating and electrochemistry (coulombs of charge transferred), and capacitor energy calculations. 1 A·h is exactly 3600 C — the conversion is a linear factor and does not depend on voltage, current profile or chemistry.
Is the conversion exact?
Yes. Both A·h and C are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).