## How to convert mAh to Wh

How to convert milliamp-hour (mAh) to watt-hour (Wh).

## milliamper-hour to watt-hour calculation

The energy

E_{(Wh)}in watt-hours is equal to the electric chargeQ_{(mAh) }in milliampere-hour times the voltageV_{(V) }in volts (V) divided by 1000:

E_{(Wh)}=Q_{(mAh)}× V_{(V)}/1000So watt-hour is equal to milliamp-hour times volts divided by 1000:

watt-hours = milliampere-hours

×volts / 1000or

Wh = mAh

×V / 1000## Example

Find the energy in watt-hours when the electric charge is 300 milliampere-hour and the voltage is 5 volts.

The energy

Eis equal to 300 milliamp-hour times 5 volts divided by 1000:

E= 300mAh × 5V / 1000 = 1.5Wh

## See also