Convert coulomb to ampere hour

Coulomb

The coulomb (symbol: C) is the SI unit of electric charge. It is the charge transported by a constant current of one ampere in one second. One coulomb equals the charge of approximately 6.242×10¹⁸ elementary charges (electrons or protons).

Ampere-Hour

The ampere-hour (symbol: A·h or Ah) is a unit of electric charge equal to 3,600 coulombs. It is widely used to express the capacity of electric batteries — for example, a 100 Ah battery can deliver 100 A for one hour.

Coulomb to Ampere-Hour conversion table

Coulomb	Ampere-Hour	Ampere-Hour	Coulomb
1	0.0002778	1	3600
2	0.0005556	2	7200
3	0.0008333	3	10800
5	0.00138889	5	18000
10	0.00277778	10	36000
20	0.00555556	20	72000
25	0.00694444	25	90000
50	0.0138889	50	180000
100	0.0277778	100	360000
250	0.0694444	250	900000
500	0.138889	500	1.8E+06
1000	0.277778	1000	3.6E+06

How to convert Coulomb to Ampere-Hour

1 C = 0.0002778 A·h. To convert any value, multiply it by 0.0002778. For example, 25 C = 0.00694444 A·h.

Frequently asked questions

How many A·h are there in one C?: One C is equal to 0.0002778 A·h.
How do you convert Coulomb to Ampere-Hour?: Multiply the value in Coulomb by 0.0002778 to get the result in Ampere-Hour.
How much is 25 C in A·h?: 25 C is equal to 0.00694444 A·h.
How do you convert Ampere-Hour back to Coulomb?: Divide by the same factor: multiply the value in Ampere-Hour by 3600 to get Coulomb.