#  # mAh to Wh conversion calculator

AppsloveWorld free services for Electric charge in milliamp-hours to energy in Watt-hours calculator.
Input the electric charge in milliamp-hours (mAh) and voltage in volts (V) and click on the Calculate button to obtain result
 Input charge (in milliamp-hours): mAh Input (voltage in volts): V Energy result (in watt-hours): Wh

## How to convert mAh to Watt-hours (Wh)?

### milliamp-hours to watt-hours calculation

E(in Wh) = Q(in mAh) × V(V) / 1000

So that you can calculate watt-hours as

watt-hours(Wh) = milliamp-hours(mAh) × volts(v) / 1000

Let’s take an example:
How do I convert battery wattage from mAh to Wh.If you have qa 500mAh battery rated at 8V,
the power is
300mAh * 500mAh * 8V / 1000 = 4Wh

### what is mAh?

when you look at a battery there is two rating mention note it one is voltage rating and the other is the mAh rating.
voltage rating is nothing but the maximum voltage that is the that is going to be supplied by the battery and the mAh rating of the milliamp-hour rating is nothing but the storage capacity of the battery.
mAh which is milliamp hour is the product of current express milliamp hour multiplied by time expressing hours.
mAh = current(mA)*time(h)
When manufactures says that this is turnovers 3000mAh battery then what is mean by that its battery can supply turnovers to the load for 1 hour when the load is drawing 3000milliampiers from it.
3000mAh/3000mA=1hour
and similarly when the load is drawing 100 milliamperes from the battery then the battery can supply follower to its for 30 hours and when the load is drawing 200 mA from the battery then the battery can supply 12 hours to it for 15 hours. 300mAh/200mA=15h in that way you can calculate the battery backup time when you have the load current mention for you.
3000mA/3000mA=1h
3000mAh/100mA=30h
3000mAh/200mA=15h
when you know how much current the load is going to draw from the battery then you can easily calculate the battery backup time using the mAh rating. 