# Voltage Drop Across Resistor Calculator & Formulas

In electrical and electronics circuits, resistors are one of the important components, which is used to limit the flow of current. Calculating the voltage drop across a resistor can be a boring and demanding task for someone who doesn’t believe in calculating much, as it involves some math and there is always room for some manual error/ calculation mistakes. Nevertheless, with the help of voltage drop across resistor calculator tools, this process is made simplified for you.

In this post, you have two voltage drop across resistor calculator tools for different circuits – one for the 2 resistors in series circuit and the other for 3 resistors in series circuit.

### Voltage Drop Across Resistor Calculator Tool for 2 Resistors in Series:

Enter the values below and click the “Calculate” button to find the voltage drop across R2 and R1.

#### RESISTOR DROP ACROSS RESISTOR CALCULATOR

The voltage across each resistor in series is inversely proportional to the total equivalent resistance (R1+R2) and directly proportional to the corresponding resistor at which voltage drop is to be calculated. To calculate the voltage across each resistor in a series circuit, we can use the following formula:

V1 = (R1 / (R1 + R2)) x V

V2 = (R2 / (R1 + R2)) x V

where V is the total input voltage or source voltage, R1 and R2 are the resistances of the two resistors, and V1 and V2 are the voltages across the individual resistors.

To simplify this calculation, you can use the voltage drop across resistor calculator tool for two resistors in series. This tool requires input values of the total voltage and the values of the two resistors. The tool then calculates and displays the voltage across each resistor.

It is important to note that this tool only works for two resistors in series. For circuits with more resistors, we need to use a different tool.

## Voltage Drop Across Resistor Calculator Tool for 3 Resistors in Series

Enter the Values with proper units below and click the “Calculate” button to find the voltage drop across each resistors.#### RESISTOR DROP ACROSS 3 RESISTOR CALCULATOR

The voltage across each resistor in series is inversely proportional to the total equivalent resistance (R1+R2+R3) and directly proportional to the corresponding resistor at which voltage drop is to be calculated. To calculate the voltage across each resistor in a series circuit, we can use the following formula:

V1 = (R1 / (R1 + R2 + R3)) x V

V2 = (R2 / (R1 + R2 + R3)) x V

V3 = (R3 / (R1 + R2 + R3)) x V

whereas, V is the total input voltage or source voltage, R1, R2, and R3 are the resistances of the three resistors, and V1, V2, and V3 are the voltages across the individual resistors.

To simplify this calculation, we can use this voltage drop calculator tool for three resistors in series. This tool requires input values of the total voltage and the values of the three resistors. The tool then calculates and displays the voltage across each resistor.

It is important to note that in a series circuit, the sum of the voltages across each resistor is equal to the total voltage. Therefore, we can use this property to check the accuracy of our calculations.

**Check Your Homework Before Submitting with voltage drop across resistor calculator:
**Before you submit any homework or assignment that involves calculating the voltage drop across a resistor, it’s important to double-check your calculations. One way to do this is to use an online voltage drop across the resistor calculator, which can help you quickly verify your results and identify any errors. It is important to check your assignments/ homework before submitting it to ensure accuracy.