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

Convert watt-hours to milliamp-hours by entering the energy in watt-hours and voltage below.

Do you want to convert mAh to Wh instead?

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

*Watt-hours*, expressed Wh or W·h, are used to measure energy in an electrical circuit. 1 watt-hour is equal to one watt of energy consumed for one hour of time.

*Milliamp-hours*, shortened as mAh or mA·h, are a measure of electrical charge. They’re often used to measure the charge of a battery, for example. A one mAh charge can supply one milliamp of current for one hour.

To convert from energy to electrical charge, the formula below can be used, in conjunction with the voltage.

### Wh to mAh Conversion Formula

mAh = (Wh × 1,000) ÷ V

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

**For example,** let’s convert 10 Wh at 12 V to mAh.

mAh = (10 Wh × 1,000) ÷ 12 V

mAh = 10,000 ÷ 12 V

mAh = 833.33 mAh

Give our kilowatt-hours to amp-hours calculator a try.