Coulombs to Milliampere-Hours Converter

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


Result in Milliampere-Hours:

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1 C = 0.277778 mAh

Do you want to convert milliampere-hours to coulombs?

How to Convert Coulombs to Milliampere-Hours

To convert a measurement in coulombs to a measurement in milliampere-hours, multiply the electric charge by the following conversion ratio: 0.277778 milliampere-hours/coulomb.

Since one coulomb is equal to 0.277778 milliampere-hours, you can use this simple formula to convert:

milliampere-hours = coulombs × 0.277778

The electric charge in milliampere-hours is equal to the electric charge in coulombs multiplied by 0.277778.

For example, here's how to convert 5 coulombs to milliampere-hours using the formula above.
milliampere-hours = (5 C × 0.277778) = 1.388889 mAh

How Many Milliampere-Hours Are in a Coulomb?

There are 0.277778 milliampere-hours in a coulomb, which is why we use this value in the formula above.

1 C = 0.277778 mAh

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

What Is a Coulomb?

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.

Learn more about coulombs.

What Is a Milliampere-Hour?

One milliampere-hour is the electric charge equal to the charge conveyed by a current of one milliampere for one hour. One milliampere-hour is equal to 3.6 coulombs.

The milliampere-hour is a non-SI metric unit for electric charge. In the metric system, "milli" is the prefix for thousandths, or 10-3. A milliampere-hour is sometimes also referred to as a milliamp-hour. Milliampere-hours are usually abbreviated as mAh, although the formally adopted expression is mA·h. The abbreviation mA h is also sometimes used. For example, 1 milliampere-hour can be written as 1 mAh, 1 mA·h, or 1 mA h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about milliampere-hours.

Coulomb to Milliampere-Hour Conversion Table

Table showing various coulomb measurements converted to milliampere-hours.
Coulombs Milliampere-hours
1 C 0.277778 mAh
2 C 0.555556 mAh
3 C 0.833333 mAh
4 C 1.1111 mAh
5 C 1.3889 mAh
6 C 1.6667 mAh
7 C 1.9444 mAh
8 C 2.2222 mAh
9 C 2.5 mAh
10 C 2.7778 mAh
11 C 3.0556 mAh
12 C 3.3333 mAh
13 C 3.6111 mAh
14 C 3.8889 mAh
15 C 4.1667 mAh
16 C 4.4444 mAh
17 C 4.7222 mAh
18 C 5 mAh
19 C 5.2778 mAh
20 C 5.5556 mAh
21 C 5.8333 mAh
22 C 6.1111 mAh
23 C 6.3889 mAh
24 C 6.6667 mAh
25 C 6.9444 mAh
26 C 7.2222 mAh
27 C 7.5 mAh
28 C 7.7778 mAh
29 C 8.0556 mAh
30 C 8.3333 mAh
31 C 8.6111 mAh
32 C 8.8889 mAh
33 C 9.1667 mAh
34 C 9.4444 mAh
35 C 9.7222 mAh
36 C 10 mAh
37 C 10.28 mAh
38 C 10.56 mAh
39 C 10.83 mAh
40 C 11.11 mAh


  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019,

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