## Watt-hour to Milliamp-hour (Wh to mAh) Formula

To convert electrical energy from watt-hours to milliampere-hours, we can use this formula:** mAh = (Wh x 1,000) / V**.

Or

Where **Wh **is the electrical energy in watt-hours, **V** is the voltage of the energy source, and **mAh** is the equivalent energy capacity in milliamp-hours.

## How to convert watt-hours to milliamp-hours?

To convert energy value from watt-hours to milliamp-hours, follow the simple steps below:

- Write down the energy value in watt-hours (Wh).
**Multiply**it by 1,000.**Divide**the result with the battery nominal voltage (V).- The result from the equation is the value of an energy capacity in milliamp-hours (mAh).

Example: Find the energy capacity of an Apple iPhone 14 Pro Max battery

What is the energy capacity of an iPhone 14 Pro Max battery with a nominal voltage of 3.86V that can produce 16.68678 Wh of electrical energy? Assuming it can use 100% of its energy capacity.

To calculate the energy capacity in milliamp-hours or mAh, use the following formula and follows by entering the given values.

Therefore,

So the energy capacity of the 3.86V battery is **4,323 mAh**.

Alternatively, our Wh to mAh conversion calculator can achieve the same result by simply entering the value of electrical energy in watt-hours and voltage in volts.

If you are on a mobile device, you can press the **COPY** button to copy the result to your device clipboard and paste it anywhere you want.

## Typical Wh to mAh Conversion Table

Below are the conversion tables from watt-hours to milliamp-hour (Wh to mAh) for different battery voltages. Use the table below for a quick reference.

### 1.2V NiMH rechargeable battery

Watt-hour (Wh) | Voltage (V) | Milliamp-hour (mAh) |
---|---|---|

0.1 Wh | 1.2 V | 83.33 mAh |

0.5 Wh | 1.2 V | 416.67 mAh |

1 Wh | 1.2 V | 833.33 mAh |

2 Wh | 1.2 V | 1,666.67 mAh |

3 Wh | 1.2 V | 2,500.00 mAh |

4 Wh | 1.2 V | 3,333.33 mAh |

5 Wh | 1.2 V | 4,166.67 mAh |

6 Wh | 1.2 V | 5,000.00 mAh |

7 Wh | 1.2 V | 5,833.33 mAh |

8 Wh | 1.2 V | 6,666.67 mAh |

9 Wh | 1.2 V | 7,500.00 mAh |

10 Wh | 1.2 V | 8,333.33 mAh |

### 1.5V Alkaline battery

Watt-hour (Wh) | Voltage (V) | Milliamp-hour (mAh) |
---|---|---|

0.1 Wh | 1.5 V | 66.67 mAh |

0.5 Wh | 1.5 V | 333.33 mAh |

1 Wh | 1.5 V | 666.67 mAh |

2 Wh | 1.5 V | 1,333.33 mAh |

3 Wh | 1.5 V | 2,000.00 mAh |

4 Wh | 1.5 V | 2,666.67 mAh |

5 Wh | 1.5 V | 3,333.33 mAh |

6 Wh | 1.5 V | 4,000.00 mAh |

7 Wh | 1.5 V | 4,666.67 mAh |

8 Wh | 1.5 V | 5,333.33 mAh |

9 Wh | 1.5 V | 6,000.00 mAh |

10 Wh | 1.5 V | 6,666.67 mAh |

### 3.6V 18650 rechargeable battery

Watt-hour (Wh) | Voltage (V) | Milliamp-hour (mAh) |
---|---|---|

0.1 Wh | 3.6 V | 27.78 mAh |

0.5 Wh | 3.6 V | 138.89 mAh |

1 Wh | 3.6 V | 277.78 mAh |

2 Wh | 3.6 V | 555.56 mAh |

3 Wh | 3.6 V | 833.33 mAh |

4 Wh | 3.6 V | 1,111.11 mAh |

5 Wh | 3.6 V | 1,388.89 mAh |

6 Wh | 3.6 V | 1,666.67 mAh |

7 Wh | 3.6 V | 1,944.44 mAh |

8 Wh | 3.6 V | 2,222.22 mAh |

9 Wh | 3.6 V | 2,500.00 mAh |

10 Wh | 3.6 V | 2,777.78 mAh |

## FAQs

How many milliamp hours in a watt-hour?

For typical 12V car or solar batteries, one watt-hour (1 Wh) equivalence to 83.33 milliamp hours (83.33 mAh).

Voltage | Watt-hour | Milliamp-hour |
---|---|---|

1.2 V | 1 Wh | 833.33 mAh |

1.5 V | 1 Wh | 666.67 mAh |

3.6 V | 1 Wh | 277.78 mAh |

9 V | 1 Wh | 111.11 mAh |

12 V | 1 Wh | 83.33 mAh |

24 V | 1 Wh | 41.67 mAh |

48 V | 1 Wh | 20.83 mAh |