Coulombs to Ampere-hours Conversion

Enter the electric charge in coulombs below to get the value converted to ampere-hours.

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Results in Ampere-hours:
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1 C = 0.000278 Ah

How to Convert Coulombs to Ampere-hours

To convert a coulomb measurement to an ampere-hour measurement, divide the electric charge by the conversion ratio. One ampere-hour is equal to 3,600 coulombs, so use this simple formula to convert:

ampere-hours = coulombs ÷ 3,600

The electric charge in ampere-hours is equal to the coulombs divided by 3,600.

For example, here's how to convert 5,000 coulombs to ampere-hours using the formula above.
5,000 C = (5,000 ÷ 3,600) = 1.388889 Ah

Coulombs and ampere-hours are both units used to measure electric charge. Keep reading to learn more about each unit of measure.

Coulombs

One coulomb is the electric charge equal to one ampere of current over one second.[1]

The coulomb can be expressed as QC = IA × ts

The charge in coulombs is equal to the current in amperes times the time in seconds.

The coulomb is the SI derived unit for electric charge in the metric system. Coulombs can be abbreviated as C, for example 1 coulomb can be written as 1 C.

Ampere-hours

One ampere-hour is the electric charge equal to the charge conveyed by a current of one ampere for one hour. One ampere-hour is equal to 3,600 coulombs.

The ampere-hour is a non-SI metric unit for electric charge. A ampere-hour is sometimes also referred to as an amp-hour. Ampere-hours can be abbreviated as Ah, for example 1 ampere-hour can be written as 1 Ah.

Coulomb to Ampere-hour Conversion Table

Coulomb measurements converted to ampere-hours
Coulombs Ampere-hours
1 C 0.000278 Ah
2 C 0.000556 Ah
3 C 0.000833 Ah
4 C 0.001111 Ah
5 C 0.001389 Ah
6 C 0.001667 Ah
7 C 0.001944 Ah
8 C 0.002222 Ah
9 C 0.0025 Ah
10 C 0.002778 Ah
20 C 0.005556 Ah
30 C 0.008333 Ah
40 C 0.011111 Ah
50 C 0.013889 Ah
60 C 0.016667 Ah
70 C 0.019444 Ah
80 C 0.022222 Ah
90 C 0.025 Ah
100 C 0.027778 Ah
200 C 0.055556 Ah
300 C 0.083333 Ah
400 C 0.111111 Ah
500 C 0.138889 Ah
600 C 0.166667 Ah
700 C 0.194444 Ah
800 C 0.222222 Ah
900 C 0.25 Ah
1,000 C 0.277778 Ah
2,000 C 0.555556 Ah
3,000 C 0.833333 Ah
4,000 C 1.1111 Ah
5,000 C 1.3889 Ah
6,000 C 1.6667 Ah
7,000 C 1.9444 Ah
8,000 C 2.2222 Ah
9,000 C 2.5 Ah
10,000 C 2.7778 Ah

References

  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9.pdf