## mAh to Wh calculation formula

E_{(Wh)} = Q_{(mAh)} × V_{(V)} / 1000

The energy **E** in watt-hours (Wh) is equal to the electric charge **Q** in milliamp-hours (mAh), multiplied by the voltage **V** in volts (V), divided by 1000.

So,

*Wh = mAh x V / 1000*

*watt-hour = milliamp-hour × volt / 1000*

**For example:**

*Electric charge (Q) = 500mAh*

*Voltage (V) = 55V*

*Energy (E) = 500mAh x 55V / 1000 = 27,5Wh*

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