Watt-Hours (Wh) to Amp-Hours (Ah) Conversion Calculator
Convert watt-hours to amp-hours by entering the energy in watt-hours and the battery terminal voltage below.
How to Convert Watt-Hours to Amp-Hours
Watt-hours (Wh) and ampere-hours (Ah) are units that are often used to measure battery capacity.
The watt-hour capacity of a battery, expressed as Wh or W·h, is a measure of the amount of energy being supplied to the load.
The ampere-hour capacity of a battery, expressed as Ah or A·h, describes the duration for which a battery can supply one ampere of current and the maximum amount of current it can supply for one hour.
To convert watt-hours to amp-hours, you can use the Ohm’s Law formula.
Wh to Ah Conversion Formula
The formula to convert energy to electrical charge using Ohm’s Law is:
Q(Ah) = E(Wh) / V(V)
Thus, the charge in amp-hours is equal to the watt-hours divided by the voltage. This is essentially the same formula used to convert watts to amps.
You can also convert Ah to Wh using a similar formula.
For example, let’s convert 600 Wh at 12 V to Ah.
Q(Ah) = 600 Wh / 12 V
Q(Ah) = 50 Ah
So, 600 watt-hours of energy at 12 volts is equal to a charge of 50 amp-hours.
You might also be interested in our kilowatt-hours to amp-hours calculator.