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

To calculate a deduplication ratio, divide the total capacity of backed up data before removing duplicates by 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