Kilowatt-Hours (kWh) to Amp-Hours (Ah) Conversion Calculator

Convert amp-hours to kilowatt-hours using the calculator below and entering the charge in Ah along with the voltage.

Do you want to convert Ah to kWh?

How to Convert Kilowatt-Hours to Amp-Hours

Kilowatt-hours, abbreviated kWh or kW·h, are a measure of electrical energy. The energy equal to one kWh is equal to one kilowatt, or one thousand watts, consumed for one hour of time.

Amp-hours, abbreviated Ah or A·h, are a measure of electrical charge, and are often used to measure the charge of batteries. One Ah will supply one amp of current for one hour.

To convert from electrical energy to charge, try the formula below which also requires the voltage.

kWh to Ah Conversion Formula

Ah = kWh × 1,000 / V

The electrical charge in amp-hours is equal to the energy in kilowatt-hours times 1,000, then divided by the voltage.

formula to convert kilowatt-hours to amp-hours

For example, let’s convert 5 kWh at 120 V to Ah.

Ah = (5 kWh × 1,000) ÷ 120 V
Ah = 5,000 ÷ 120 V
Ah = 41.667 Ah

You might also want to convert watt-hours to milliamp-hours.