How Does Google Calculates Bounce Rate and Exit Rate?

Rate this post
Bounce rate and Exit
rate calculation in Google Analytics is really confusing. Let me solve this
confusion today by providing 
a simple example as to
how Google calculates exit rate and bounce rate for any site.
Here is a simple
definition of the two:
Bounce Rate:
Percentage of visits that leave from the landing page itself.
Exit Rate: Percentage
of exits that happen on a particular page.
Exit Rate Calculation
As for example, we are
having 4 pages on our site namely A, B, C and D. The following sessions happen
on the website: 
A-B-C (Visitor enters
Page A, browses and move to Page B then exits from Page C)
B-A-C (Visitor enters
Page B, browses and move to Page A then exits from Page C)
B-A (Visitor enters
Page B, browses then exits from Page A)
D-A-B (Visitor enters
Page D, browses and move to Page A then exits from Page B)
To calculate the exit
rate, we need to identify the number of times any page participates in the
sessions.
As per the above
example, here are the numbers of page specific sessions:
Sessions:
A- 4 (Page A
participates in 4 sessions) 
B- 4 (Page B
participates in 4 sessions)
C-2 (Page C
participates in 2 sessions)
D- 1 (Page D
participates in 1 session)
Now, we will identify
the number of times any user exits from a certain page. Here:
A- 1 (user exits in
the 3rd session)
B- 1 (user exits in
the 4th session)
C- 2 (user exits in
both 1st and 2nd session)
D- 0 (user does not
exits from this page on any sessions)
Exit rate will get
calculated as per the following formula: 
(Number of
Exits/Number of Participated Sessions)*100
A- 1/4*100= 25% 
B- 1/4*100= 25%
C- 2/2*100= 100%
D- 0/1*100= 0%
Bounce Rate
Calculation
To calculate the
bounce rate, we need to first identify number of times a page becomes the
landing page.
Here:
Landing Pages
A- 1 (Page A is the
landing page for 1 session)
B- 2 (Page B is the
landing page for 2 sessions)
C- 0 (Page A is the
landing page for 0 session)
D- 1 (Page A is the
landing page for 1 session)
Bounce Rate will get
calculated as per the following formula: 
(Number of
Exits/Number of Landing Page Visits)*100
A- 1/1*100= 100%
B- 1/2*100= 50%
C- 2/0*100=0%
D- 0/1*100= 0%
Where To See Bounce
Rate and Exit Rate?
Bounce Rate in GA
Move to
“Behavior” -> “Site Content” -> “All
Pages”,
you will see both the bounce rate and the exit rate.
To view, how Google
calculated Exit Rate, move to “Behavior” -> “Site
Content” -> “Exit Pages”, Divide Exit by Pageviews and 
you get the Exit Rate
displayed in the dashboard.
Here is the formula
used: 
Exit Rate=
Exits/PageViews*100
There is no proper way
to verify bounce rate calculation directly in analytics.

Also See:

How to Create Goals in GA?
Regular Expressions on Google Analytics
List of Google Search Operators
Multi Channel Funnels in GA
Custom Variables in Google Analytics
How to Create a New Dashboard in Google Analytics?
Understanding Goal Flow in Google Analytics
Difference Between Clicks and Visits
Understanding Goal Flow in Google Analytics