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

To calculate the open rate, divide the number of opens by the number of impressions, then multiply by 100.

## 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