# Milliamp-Hours (mAh) to Watt-Hours (Wh) Conversion Calculator

Convert milliamp-hours to watt-hours by entering mAh and voltage below.

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## How to Convert Milliamp-Hours to Watt-Hours

*Milliamp-hours*, abbreviated mAh or mA·h, are a measure of electric charge. They are most often used to measure the electrical charge of a battery.

*Watt-hours*, expressed as Wh or W·h, are a measure of electrical energy. Wh are usually used to measure the energy consumption of a circuit or appliance.

The conversion from electric charge to energy requires the voltage and can be done using the formula below.

### mAh to Wh Conversion Formula

Wh = (mAh × V) ÷ 1,000

Thus, the energy in watt-hours is equal to the charge in milliamp-hours times the voltage, then divided by 1,000.

**For example,** convert the charge used by the average C battery, which is 8,000 mAh at 1.5 V, to Wh.

Wh = (8,000 mAh × 1.5 V) ÷ 1,000

Wh = 12,000 ÷ 1,000

Wh = 12 Wh

## Common Battery Charge to Energy Conversions

Battery Size | Capacity (mAh) | Energy (Wh) | Voltage |
---|---|---|---|

AA | 2,700 mAh | 4.05 Wh | 1.5 V |

AAA | 1,200 mAh | 1.8 Wh | 1.5 V |

AAAA | 625 mAh | 0.9375 Wh | 1.5 V |

C | 8,000 mAh | 12 Wh | 1.5 V |

D | 12,000 mAh | 18 Wh | 1.5 V |

9V | 565 mAh | 5.085 Wh | 9 V |

Try converting amp-hours to kilowatt-hours.