Enter the total capacity of backed up data before removing duplicates and the capacity after the backup is complete into the Deduplication Ratio Calculator. The calculator will evaluate and display the Deduplication Ratio. 

Deduplication Ratio Formula

The following formula is used to calculate the Deduplication Ratio. 

DEDR = CBB / CAB

  • Where DEDR is the Deduplication Ratio
  • CBB is the total capacity of backed up data before removing duplicates 
  • CAB is the capacity after the backup is complete 

How to Calculate Deduplication Ratio?

The following example problems outline how to calculate Deduplication Ratio.

Example Problem #1:

  1. First, determine the total capacity of backed up data before removing duplicates. 
    • The total capacity of backed up data before removing duplicates is given as: 500.
  2. Next, determine the capacity after the backup is complete. 
    • The capacity after the backup is complete is provided as: 600.
  3. Finally, calculate the Deduplication Ratio using the equation above: 

DEDR = CBB / CAB

The values given above are inserted into the equation below and the solution is calculated:

DEDR = 500 / 600 = .833


Example Problem #2: 

For this problem, the variables required are provided below:

total capacity of backed up data before removing duplicates = 700

capacity after the backup is complete = 800

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

DEDR = CBB / CAB = ?