Enter the number of opens and the number of impressions into the Open Rate Calculator. The calculator will evaluate the Open Rate. 

Open Rate Formula

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

OR = #O / #I * 100

  • Where OR is the Open Rate (%)
  • #O is the number of opens 
  • #I is the number of impressions 

How to Calculate Open Rate?

The following example problems outline how to calculate Open Rate.

Example Problem #1:

  1. First, determine the number of opens. 
    • The number of opens is given as: 100.
  2. Next, determine the number of impressions. 
    • The number of impressions is provided as: 400.
  3. Finally, calculate the Open Rate using the equation above: 

OR = #O / #I * 100

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

OR =100 / 400 * 100 = 25.00 (%)


Example Problem #2: 

For this problem, the variables required are provided below:

number of opens = 15

number of impressions = 600

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

OR = #O / #I * 100 = ?