Enter the resistance of R1 (ohms) and the resistance of R2 (ohms) into the Resistor Ratio Calculator. The calculator will evaluate and display the Resistor Ratio.

## Resistor Ratio Formula

The following formula is used to calculate the Resistor Ratio.

RR = R1 / R2

• Where RR is the Resistor Ratio
• R1 is the resistance of R1 (ohms)
• R2 is the resistance of R2 (ohms)

## How to Calculate Resistor Ratio?

The following example problems outline how to calculate Resistor Ratio.

Example Problem #1:

1. First, determine the resistance of R1 (ohms).
• The resistance of R1 (ohms) is given as: 58.
2. Next, determine the resistance of R2 (ohms).
• The resistance of R2 (ohms) is provided as: 90.
3. Finally, calculate the Resistor Ratio using the equation above:

RR = R1 / R2

The values given above are inserted into the equation below and the solution is calculated:

RR = 58 / 90 = .6444

Example Problem #2:

For this problem, the variables required are provided below:

resistance of R1 (ohms) = 90

resistance of R2 (ohms) = 100

Test your knowledge using the equation and check your answer with the calculator above.RR = R1 / R2 = ?