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

How to Convert Milliamp-Hours (mAh) to Watt-Hours (Wh)

Converting milliamp-hours (mAh) to watt-hours (Wh) is a common calculation in battery and energy storage applications. This conversion helps us understand and compare the energy capacity of different batteries, regardless of their voltage.

Conversion Formula

The formula to convert mAh to Wh is:

\[Wh = \frac{mAh \times V}{1000}\]

Where:

• Wh is the energy capacity in watt-hours
• mAh is the battery capacity in milliamp-hours
• V is the voltage in volts
• 1000 is the conversion factor from milliamp-hours to amp-hours

Calculation Steps

1. Determine the battery capacity in milliamp-hours (mAh)
2. Identify the battery voltage in volts (V)
3. Multiply the mAh value by the voltage
4. Divide the result by 1000 to convert from milliwatt-hours to watt-hours

Example Calculation

Let's convert a 2500 mAh battery with a voltage of 3.7 V to Wh:

1. Identify the given values: \[mAh = 2500\] \[V = 3.7\]
2. Apply the formula: \[Wh = \frac{2500 \times 3.7}{1000} = 9.25\]

Therefore, a 2500 mAh battery at 3.7 V has an energy capacity of 9.25 Wh.

Calculation Visualization

This bar chart visually compares the input battery capacity (2500 mAh) and the resulting energy capacity (9.25 Wh) from our example calculation. The height of each bar is proportional to its value, illustrating how the voltage affects the conversion from mAh to Wh. Note that the Wh value is smaller than the mAh value due to the conversion factor and voltage.