kWh ⇄ Ah ⇄ Wh Converter
Convert battery energy between kilowatt-hours, watt-hours and amp-hours at a given voltage, free online.
About this calculator
Energy (Wh) = amp-hours × voltage, and 1 kWh = 1000 Wh. A 12 V 100 Ah battery stores 1.2 kWh; a 5000 mAh phone battery at 3.7 V stores 18.5 Wh. Enter any one value with the voltage.