# Coulombs to Ampere-hours Conversion

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

**Results in Ampere-hours:**

## 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:

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.

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 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.

## 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. An ampere-hour is sometimes also referred to as an amp-hour. Ampere-hours are usually abbreviated as *Ah*, although the formally adopted expression is *A·h*. The abbreviation *A h* is also sometimes used. For example, 1 ampere-hour can be written as 1 Ah, 1 A·h, or 1 A 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 Ampere-hour Conversion Table

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

- 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