Milliamp Hours to Watt Hours Conversion Calculator (mAh to Wh)

Milliamp Hours to Watt Hours Calculator

Enter the Milliamp Hours capacity value and battery voltage to get the result of Watt-hours.

Or you need to convert Wh to mAh, calculator: Watt Hours to Milliamp Hours Calculator.

How to convert milliampere-hours to watt-hours?

Smaller batteries are usually measured in milliampere-hours, abbreviated as mAh, and the milliampere-hour (mAh) unit is often used to describe battery capacity. The watt-hour (Wh) unit usually describes the amount of electricity used. In some cases you may need to convert mAh to Wh.

The Milliampere-hour value indicates the amount of current that can be emitted continuously over a period of one hour. For example: 5mAh capacity means that the battery can release 5mA of current for 1 hour, of course, this is related to the discharge current, if it is 1mA of discharge current, it can be discharged for 5 hours.

The battery is a closed device, we can use a multimeter to link the two teminals of the battery to get the existing battery capacity mAh value. The discharge voltage of the device also needs to be measured.

At this time, the watt-hour value of electrical energy can be obtained by calculating the formula.

Formula: Watt-Hour = Milliamp-Hour × Volts ÷ 1000

Abbreviated Formula: Wh = mAh×V÷1000

For example, if you have a 2500mAh battery rated at 3.7V, the power is 2500mAh3.7V / 1000 = 9.25Wh.

mAh to Wh Conversion Chart

The following is the conversion table of lithium battery voltage 3.7V milliampere-hour (mAh) to watt-hour (Wh), ranging from 1mAh to 50000mah:

Milliamp Hours (mAh)Voltage (V)Watt Hours (Wh)
1mAh3.7V0.0037Wh
1,000mAh3.7V3.7Wh
1,200mAh3.7V4.44Wh
2,000mAh3.7V7.4Wh
2,500mAh3.7V9.25Wh
3,000mAh3.7V11.1Wh
4,000mAh3.7V14.8Wh
4,500mAh3.7V16.65Wh
5,000mAh3.7V18.5Wh
7,500mAh3.7V27.75Wh
8,800mAh3.7V32.56Wh
10,000mAh3.7V37Wh
15,000mAh3.7V55.5Wh
20,000mAh3.7V74Wh
25,000mAh3.7V92.5Wh
30,000mAh3.7V111Wh
50,000mAh3.7V185Wh