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Coulombs to Ah Converter

1 C = 0.0002777777778 Ah. Type any value to convert coulombs to Ah.

1 C = 0.0002777777778 Ah

Formula: Ah = C ÷ 3,600

Common values
Decimals
In every unit 5 units
Coulomb (C) 1 C
Millicoulomb (mC) 1,000 mC
Milliampere-hour (mAh) 0.2777777778 mAh
Ampere-hour (Ah) 0.0002777777778 Ah
Elementary charge (e) 6.241509074 × 10¹⁸ e

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If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

Coulombs to Ah table

Formula: Ah = C ÷ 3,600

Coulomb (C)Ampere-hour (Ah)
0.1 C0.00002777777778 Ah
0.25 C0.00006944444444 Ah
0.5 C0.0001388888889 Ah
1 C0.0002777777778 Ah
2 C0.0005555555556 Ah
3 C0.0008333333333 Ah
4 C0.001111111111 Ah
5 C0.001388888889 Ah
6 C0.001666666667 Ah
7 C0.001944444444 Ah
8 C0.002222222222 Ah
9 C0.0025 Ah
10 C0.002777777778 Ah
12 C0.003333333333 Ah
15 C0.004166666667 Ah
20 C0.005555555556 Ah
25 C0.006944444444 Ah
30 C0.008333333333 Ah
40 C0.01111111111 Ah
50 C0.01388888889 Ah
60 C0.01666666667 Ah
75 C0.02083333333 Ah
100 C0.02777777778 Ah
150 C0.04166666667 Ah
200 C0.05555555556 Ah
250 C0.06944444444 Ah
500 C0.1388888889 Ah
1,000 C0.2777777778 Ah

How to use: Coulombs to Ah

  1. 1 Type the value in coulombs.
  2. 2 The result in Ah appears at once – or type in the Ah field to convert back.
  3. 3 Pick a common value, round to fewer decimals or swap the units with one click.
  4. 4 Copy the result, or open “In every unit” to see the value in all units of electric charge.

About this tool

Coulomb (C) is a unit of electric charge (SI). Ampere-hour (Ah) is a unit of electric charge (metric, accepted for use with the SI); 1 Ah = 3,600 C.

To convert coulombs to Ah, divide the value by 3,600 (Ah = C ÷ 3,600). Example: 2,000 C = 0.5555555556 Ah.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

How do I convert coulombs to Ah?

To convert coulombs to Ah, divide the value by 3,600: Ah = C ÷ 3,600. For example 2,000 C = 0.5555555556 Ah.

What is 1 C in Ah?

1 C = 0.0002777777778 Ah. The other way round, 1 Ah = 3,600 C.

How exact is the result?

The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.

Can I convert other units of electric charge here?

Yes – choose any of the 5 units of electric charge in the From and To lists, or switch to another measurement at the top.

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