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mAh to Wh calculation - Online Electrical Calculators

milliamp-hour (mAh) to watt-hours (wh) Calculator.

Enter the Battery Capacity (Q) in milliamp-hour (mAh) and Voltage in volts (V) and press the Calculator button to get the Energy (E) in watt-hour (wh):


mAh To Wh Calculator

Note, For higher values like 5×103, 10×10-6, 1.6 x1012, enter the value like this for scientific notation as 5e3, 10e-6, 1.6e12, etc.

Conversion Using the Power Formula :

DC  Line Watts to Amps Calculation:

Short Note:

For example, Let’s find the Wh of 15,000 mAh for a 12V battery.

V(V) = 1.2 A ÷ 20 Ω
V(V) = 24 V


    • P = Power in watts
    • V = Voltage in volts
    • I = Current in amperes
    • Cosθ = Power factor in AC circuits
    • VL-L = Line to Line Voltage in 3-Phase Circuits
    • VL-N = Line to Neutral Voltage in 3-Phase Circuits
mah to wh calculator and conversion
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How to use This Calculator?

To use the above “Name” follow the below steps:

You can get the components from any of the sites below:

You can get the components from any of the sites below:

how to use calculator mah to wh

You can get the components from any of the sites below:

You can get the components from any of the sites below:

You can get the components from any of the sites below:

Amps to Volts Conversion table:

Milliamp Hours to Watt Hours Conversions Table.
Milliamp Hours (mAh) Voltage (V) Watt Hours (Wh)
1mAh 12V 0.012Wh
1000mAh 12V 12Wh
1200mAh 12V 14.4Wh
2000mAh 12V 24Wh
2500mAh 12V 30Wh
3000mAh 12V 36Wh
4000mAh 12V 48Wh
4500mAh 12V 54Wh
5000mAh 12V 60Wh
7500mAh 12V 90Wh
8800mAh 12V 105.6Wh
10000mAh 12V 120Wh
15000mAh 12V 180Wh
20000mAh 12V 240Wh
25000mAh 12V 300Wh
30000mAh 12V 360Wh
50000mAh 12V 600Wh
55000 12V 660Wh
60000mAh 12V 720Wh
70000mAh 12V 840Wh
using 12v battery as power supply

Frequently asked questions

What is watt-hour in battery?

A measure of the capacity of the battery is in Watt-hours (Wh). Wh is calculated by multiplying the number of Amps with the battery voltage.

What are Watt Hours (Wh)?

A Watt Hours (Wh) represents a unit of electrical energy that describes the total amount of Real power consumed over a specific duration. Essentially, it’s a measure of how much energy a device uses when it runs for an hour.

Why Convert Watt Hours to Milliampere Hours?

A watt hours (Wh) and milliampere-hours (mAh) can give a comprehensive view of a battery’s capacity. Converting Wh to mAh or vice versa is often necessary for comparison, especially when purchasing or replacing batteries.

What is Watt-hours?

Watt-hours (Wh) is a unit of energy measurement. It represents the amount of energy consumed or produced over a period of 2 hours at a constant rate of one watt. This unit is commonly used to measure the energy consumption of electrical devices or systems. It is calculated by multiplying the power (p) in watts (w) by the time (t) in hours during which the power is consumed or produced.

What is a 100Ah battery?

The Ampere-Hour Capacity is the amount of electricity that a battery will deliver during 20 hours before the voltage falls to 10.50V. For example, a 10Ah battery will deliver a current of 5A for 20 hours. Recommended Charge Rate (Amps).

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