# Coulombs to Milliampere-hours Conversion

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

**Results in Milliampere-hours:**

## How to Convert Coulombs to Milliampere-hours

To convert a coulomb measurement to a milliampere-hour measurement, multiply the electric charge by the conversion ratio. One coulomb is equal to 0.277778 milliampere-hours, so use this simple formula to convert:

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

**For example,**here's how to convert 5 coulombs to milliampere-hours using the formula above.

Coulombs and milliampere-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 Q_{C} = I_{A} × t_{s}

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.

## Milliampere-hours

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 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.^{[2]}

## Coulomb to Milliampere-hour Conversion Table

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 |

## References

- 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
- Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9-EN.pdf