Use Wh to mAh conversion calculator  for Wh(watt-hours) to mAh(milliamp-hours) conversion calculation.
Input the energy in watt-hours, the voltage in volts (V) and click the Calculate button

Energy (in watt-hours): Wh
voltage (in volts): V
result in milliamp-hours: mAh

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How to convert watt-hour (Wh) to milliampere-hour (mAh)

Formula :

mAh = Wh * 1000/v

The electric charge Q(mAh) in milliamp-hours(mAh) is equal to 1000 times the energy E(Wh) in watt-hours (Wh) divided by the voltage V(v) in volts(V):

Q(mAh) = 1000 * E (Wh)/V(in volts)

So that you can define  milliamp-hours(mAh) is equal to 1000 times watt-hours(Wh) divided by volts:

milliamp-hours = 1000 * watt-hours/volts or mAh=1000*Wh/v

Let’s understand with an example

Example 1: 32.4 Wh to mAh

What is  the electric charge in milliamp-hour(mah) when the energy consumption is 32.4 watt-hour(Wh)
and the voltage is 15 volts.
Q = 32.4Wh * 1000/15V = 2160mAh

Example 2 : 40.88 Wh to mAh

Find the electric charge in milliamp-hours when the energy consumption is 40.88 watt-hours and voltage is 5 volts.the electric charge Q is equal to 1000 times 2 watt-hours, divided by 5 volts:

Q = 1000 * 40.88Wh/5V = 8,176mAh

Example 3 : 100Wh to mAh

As we know generally the mAh capacity of a Lithium battery-based is mentioned relative to a Lithium cell, which has a voltage of 3.7V.

Q = 1000 * 100Wh/3.7V = 27,027mAh

Example 3 : 160 Wh to mAh

Q = 1000 * 160Wh/3.7V = 43,243.24mAh

If you know the voltage, you can apply this formula: To go from Wh to mAh, divide Wh by Voltage, and multiply by 1000.

Q(mAh) = 1000 × E (Wh) / V(V)

For example:
Energy in watt hour is, E(Wh) = 2 Wh
Voltage is = 3.7 V
Q(mAh) = 1000 x E(Wh) / V = 1000 x 2 / 3.7 = 540.54 mAh

Let’s take One Example, I have a battery with 20,000 mAh battery rated at 10V, then the power(wh) should be 20,000mAh * 10V / 1000 = 200Wh

Watt-Hour (Wh):- A unit of electrical energy equal to the power of one watt in use for one hour; often used as a unit of electricity consumption.

Milliampere-Hour (mAh):- An milliamp-hour (mAh) is a unit for measuring electric power over time. (mAh) is often used to describe the total amount of energy, a battery can store at one time. it’s the easiest way to distinguish the capacity of a battery. The higher the mAh, the longer the battery will last.

Volt:- A volt is a unit to measure the force of the electric current.

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