Determine the size of Redo file according no of switches per hour in Oracle

For calculating the Size of Redo log file, we can use the following formula:

(Current Switches per hour * Redo Log Size)/(Desired number of Switches)=New redo log size

Example: Suppose we are having 100 M Size of redo log file which switch on an average 10 times in hours and we want to make switch 4 times per hours. For that we can calculate the New Redo log size by using the formula:

Current Switches per hour = 10
Redo log Size = 100 M
Desired number of switches = 4
Calculate New Redo log Size: 10*100/4 = 250M New Size needed for Redo log file to make switches 4 per hours.
Note: 
New Redo Size = (Current Switches per hour * Redo Log Size)/(Desired number of Switches)