mAh Watt Calculator

Using the mAh Watt calculation tool, you can calculate the conversion of electrical load in milliampere-hours (mAh) into energy in Watt-hours (Wh). Enter the electrical charge in milliampere-hours (mAh) and the voltage in volts (V) and press the Calculate button.

The result will appear here.

How to convert mAh to Watts

To calculate mAh value in Watts, you must know the voltage value. Enter milliamp hours (mAh) and voltage (V) and click Calculate to get Watt hours (Wh).

mAh Watt calculation formula

(mAh)*(V)/1000 = (Wh)

For example, if you have a 300mAh battery rated at 5V, the power is 300mAh * 5V / 1000 = 1.5Wh.

You can automatically convert between power units mAh and Watt-hour (Wh) with the tool on the page. The conversion process you make works automatically based on the watt mah calculation formula. To perform the conversion, simply enter the value you want in the box below and press the “Calculate” button. The result will appear immediately below.