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

- All Rate Calculators
- Click-Through Rate (CTR) Calculator
- VTR (View-Through Rate) Calculator
- Engagement Rate Calculator

## 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:

- First, determine the number of opens.
- The number of opens is given as: 100.

- Next, determine the number of impressions.
- The number of impressions is provided as: 400.

- 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** = ?**