Enter the battery current (amps) and the battery resistance (ohms) into the calculator to determine the Battery Voltage.

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## Battery Voltage Formula

The following formula is used to calculate the Battery Voltage.

**Vb = Ib * Rb**

Variables:

- Where Vb is the Battery Voltage (volts)
- Ib is the battery current (amps)
- Rb is the battery resistance (ohms)

## How to Calculate Battery Voltage?

The following two example problems outline the steps and information needed in order to calculate the Battery Voltage.

**Example Problem #1:**

- First, determine the battery current (amps). In this example, the battery current (amps) is measured to be 105.
- Next, determine the battery resistance (ohms). For this problem, the battery resistance (ohms) is calculated to be 3.
- Finally, calculate the Battery Voltage using the formula above:

Vb = Ib * Rb

Inserting the values from above into the equation yields:

Vb = 105 * 3 = 315 (volts)

**Example Problem #2: **

Using the same process as the first example, define the variables outlined by the formula. In this case, these values are:

battery current (amps) = 30

battery resistance (ohms) = 3

Entering these values into the formula or calculator above gives us::

Vb = 30* 3 = 90 (volts)