Convert Ah to Coulombs
Enter the number of ampere-hours that you want to convert to coulombs.
How to Convert Ampere-hours to Coulombs
The ampere-hour and coulomb are both units of electric charge. By definition, 1 ampere-hour equals exactly 3600 coulombs. This means to convert ampere-hours to coulombs, you multiply by 3600.
Formula
Step-by-Step Example
Convert 5 Ah to coulombs:
We need to convert ampere-hours to coulombs
Since 1 Ah = 3600 C, multiply by 3600
5 × 3600 = 18000
5 Ah = 18000 C
Ampere-hour to Coulomb Conversion Table
Quick reference table for common ampere-hour to coulomb conversions. Click any value for detailed calculation.
| Ampere-hours (Ah) | Coulombs (C) |
|---|---|
| 0.1 Ah | 360 C |
| 0.5 Ah | 1800 C |
| 1 Ah | 3600 C |
| 2 Ah | 7200 C |
| 5 Ah | 18000 C |
| 10 Ah | 36000 C |
| 25 Ah | 90000 C |
| 50 Ah | 180000 C |
| 100 Ah | 360000 C |
About These Units
Ampere-hour (Ah)
An ampere-hour (Ah) equals 3,600 coulombs—the charge delivered by 1 ampere flowing for 1 hour. Standard battery capacity unit: car batteries 50-100 Ah, deep-cycle batteries 100-400 Ah, EV batteries measured in kWh (Ah × voltage). One Ah = 1000 mAh.
Coulomb (C)
The coulomb (C) is the SI unit of electric charge, defined as the charge transferred by 1 ampere flowing for 1 second. One coulomb equals 6.242×10¹⁸ elementary charges (electrons or protons). Named after physicist Charles-Augustin de Coulomb. Formula: Q = I × t (charge = current × time).
Frequently Asked Questions
How do I convert ampere-hours to coulombs?
To convert ampere-hours to coulombs, multiply the value by 3600. For example, 10 Ah = 36000 C.
How many coulombs are in 1 ampere-hour?
1 ampere-hour equals 3600 coulombs.
What is the formula for ampere-hours to coulombs?
The formula is: C = Ah × 3600.