Amp-Hours (Ah) to Kilowatt-Hours (kWh) Conversion Calculator
Convert amp-hours to kilowatt-hours using the calculator below by entering the electrical charge in Ah along with the voltage.
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How to Convert Amp-Hours to Kilowatt-Hours
Amp-hours, often expressed as Ah or A·h, are a measure of electrical charge. Amp-hours are often used to measure the charge capacity of a battery, for example. One Ah is the amount of electrical charge transferred by one amp of current in one hour of time.
Kilowatt-hours, expressed as kWh or kW·h, are used to measure electrical energy. One kWh is equal to one kilowatt, or one thousand watts, of power consumed for one hour of time.
Ah to kWh Conversion Formula
kWh = Ah × V / 1,000
The electrical energy in kilowatt-hours is equal to the charge in amp-hours times the voltage, then divided by 1,000.
For example, let’s convert 20 Ah at 120 V to kWh.
Energy in kWh = 20 Ah × 120 V / 1,000
Energy in kWh = 2,400 Wh / 1,000
Energy in kWh = 2.4 kWh
You might be interested in our milliamp-hours to watt-hours calculator.