Enter the current inflation rate (%) and the past inflation rate (%) into the Deflation Rate Calculator. The calculator will evaluate the Deflation Rate.

## Deflation Rate Formula

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

DR = (I2-I1) / I2*100

• Where DR is the Deflation Rate (%)
• I1 is the current inflation rate (%)
• I2 is the past inflation rate (%)

## How to Calculate Deflation Rate?

The following example problems outline how to calculate Deflation Rate.

Example Problem #1:

1. First, determine the current inflation rate (%).
• The current inflation rate (%) is given as: 5.
2. Next, determine the past inflation rate (%).
• The past inflation rate (%) is provided as: 4.
3. Finally, calculate the Deflation Rate using the equation above:

DR = (I2-I1) / I2*100

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

DR = (5-4) / 5*100 = 20.00 (%)

Example Problem #2:

For this problem, the variables required are provided below:

current inflation rate (%) = 6

past inflation rate (%) = 4