Calculate click to open rate, clicks, or opens from any two email metrics and see the missing value in percent or count instantly.

Click to Open Rate Calculator

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Click to Open Rate Formula

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

COR = C / O * 100
  • Where COR is the Click to Open Rate (%)
  • C is the number of clicks 
  • O is the number of opens 

To calculate the click to open rate, divide the number of clicks by the number of opens, then multiply by 100.

Click-to-Open Rate Conversion Table (Clicks = Opens × Rate)
Number of Opens Click-to-Open Rate (%) Number of Clicks
5010%5
1008%8
20012.5%25
25020%50
30015%45
40018%72
50022%110
75020%150
1,00030%300
1,20012%144
1,50016%240
2,00018%360
2,50014%350
3,00020%600
4,00022%880
5,00025%1,250
7,50015%1,125
10,00020%2,000
15,00018%2,700
20,00025%5,000
Formulae: CTOR (%) = (Clicks / Opens) × 100. Clicks = Opens × (CTOR% / 100). Avoid Opens = 0.

How to Calculate Click to Open Rate?

The following example problems outline how to calculate Click to Open Rate.

Example Problem #1:

  1. First, determine the number of clicks.
    • The number of clicks is given as: 500.
  2. Next, determine the number of opens.
    • The number of opens is provided as: 1000.
  3. Finally, calculate the Click to Open Rate using the equation above: 

COR = C / O * 100

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

COR = 500 / 1000 * 100 = 50.00 (%)


Example Problem #2: 

For this problem, the variables required are provided below:

number of clicks = 45

number of opens = 60

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

COR = C / O * 100 = ?