Enter the change in the first value and the change in the second value relative to the first value into the Related Rate Calculator. The calculator will evaluate the Related Rate.

Related Rate Formula

The following two example problems outline the steps and information needed to calculate the Related Rate.

RLR = dV1 / dV2(1)
• Where RLR is the Related Rate ( )
• dV1 is the change in the first value
• dV2(1) is the change in the second value relative to the first value

To calculate a related rate, divide the change in the first value by the change in the second related value.

How to Calculate Related Rate?

The following example problems outline how to calculate Related Rate.

Example Problem #1:

1. First, determine the change in the first value.
• The change in the first value is given as: 40.
2. Next, determine the change in the second value relative to the first value.
• The change in the second value relative to the first value is provided as: 80.
3. Finally, calculate the Related Rate using the equation above:

RLR = dV1 / dV2(1)

The values provided above are inserted into the equation below and computed.

RLR = 40 / 80 = .50

Example Problem #2:

For this problem, the variables required are provided below:

change in the first value = 60

change in the second value relative to the first value = 80

Test your knowledge using the equation and check your answer with the calculator.

RLR = dV1 / dV2(1) = ?