## Ah to Wh Formula

The formula to convert an energy value from ampere-hours to watt-hours is** Wh = Ah x V**.

Or

Where **Ah **is the energy value in amp-hours, **V** is the voltage of the energy source, and **Wh** is the equivalent energy value in watt-hours.

## How to convert amp-hour to watt-hour?

To convert energy value from amp-hours to watt-hours or Ah to Wh, follow the simple steps below:

- Write down the energy value in amp-hours (Ah).
**Multiply**it by the value of the energy source voltage (V).- The result from the equation is the value of an energy value in watt-hours (Wh).

Example: Find the maximum energy that can be produced by a 12V battery

What is the maximum energy can a 12V battery rated at 100Ah generates in Wh? Assuming it can use 100% of its capacity.

To find the maximum generated energy by the battery in watt-hours or Wh, use the following formula and follows by entering the given values.

Therefore,

So, the maximum energy generated by a 12V battery with a capacity rated at 100Ah is **1,200 Wh.**

## Typical Ah to Wh Conversion Table

Here is the conversion table from amp-hours (Ah) to watt-hours (Wh) for typical voltage sources. Use the table for a quick reference and remember it for everyday use.

### 1.2V NiMH rechargeable battery

Ampere-hour (Ah) | Voltage (V) | Watt-hour (Wh) |
---|---|---|

0.1 Ah | 1.2 V | 0.12 Wh |

0.5 Ah | 1.2 V | 0.60 Wh |

1 Ah | 1.2 V | 1.20 Wh |

2 Ah | 1.2 V | 2.40 Wh |

3 Ah | 1.2 V | 3.60 Wh |

4 Ah | 1.2 V | 4.80 Wh |

5 Ah | 1.2 V | 6.00 Wh |

6 Ah | 1.2 V | 7.20 Wh |

7 Ah | 1.2 V | 8.40 Wh |

8 Ah | 1.2 V | 9.60 Wh |

9 Ah | 1.2 V | 10.80 Wh |

10 Ah | 1.2 V | 12.00 Wh |

### 1.5V Alkaline battery

Ampere-hour (Ah) | Voltage (V) | Watt-hour (Wh) |
---|---|---|

0.1 Ah | 1.5 V | 0.15 Wh |

0.5 Ah | 1.5 V | 0.75 Wh |

1 Ah | 1.5 V | 1.50 Wh |

2 Ah | 1.5 V | 3.00 Wh |

3 Ah | 1.5 V | 4.50 Wh |

4 Ah | 1.5 V | 6.00 Wh |

5 Ah | 1.5 V | 7.50 Wh |

6 Ah | 1.5 V | 9.00 Wh |

7 Ah | 1.5 V | 10.50 Wh |

8 Ah | 1.5 V | 12.00 Wh |

9 Ah | 1.5 V | 13.50 Wh |

10 Ah | 1.5 V | 15.00 Wh |

### 3.6V 18650 rechargeable battery

Ampere-hour (Ah) | Voltage (V) | Watt-hour (Wh) |
---|---|---|

0.1 Ah | 3.6 V | 0.36 Wh |

0.5 Ah | 3.6 V | 1.80 Wh |

1 Ah | 3.6 V | 3.60 Wh |

2 Ah | 3.6 V | 7.20 Wh |

3 Ah | 3.6 V | 10.80 Wh |

4 Ah | 3.6 V | 14.40 Wh |

5 Ah | 3.6 V | 18.00 Wh |

6 Ah | 3.6 V | 21.60 Wh |

7 Ah | 3.6 V | 25.20 Wh |

8 Ah | 3.6 V | 28.80 Wh |

9 Ah | 3.6 V | 32.40 Wh |

10 Ah | 3.6 V | 36.00 Wh |

## FAQs

How many watt hours in an amp-hour?

For typical 12V car or solar batteries, one amp-hour (1 Ah) equivalence to 12 watt-hours (12 Wh).

Voltage | Amp hour | Watt-hour |
---|---|---|

1.2 V | 1 Ah | 1.2 Wh |

1.5 V | 1 Ah | 1.5 Wh |

3.6 V | 1 Ah | 3.6 Wh |

9 V | 1 Ah | 9 Wh |

12 V | 1 Ah | 12 Wh |

24 V | 1 Ah | 24 Wh |

48 V | 1 Ah | 48 Wh |