Enter the increase in production output and the marginal product into the Calculator. The calculator will evaluate the Variable Input. 

Variable Input Formula

VI = IP / MP


  • VI is the Variable Input ()
  • IP is the increase in production output
  • MP is the marginal product

To calculate Variable Input, divide the increase in production output by the marginal product.

How to Calculate Variable Input?

The following steps outline how to calculate the Variable Input.

  1. First, determine the increase in production output. 
  2. Next, determine the marginal product. 
  3. Next, gather the formula from above = VI = IP / MP.
  4. Finally, calculate the Variable Input.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

increase in production output = 74

marginal product = 30