Calculate the missing value in a reverse inflation calculator by entering current price, inflation rate, and initial price before inflation.
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Reverse Inflation Formula
The reverse inflation calculation is based on the relationship between an initial price, an inflation rate, and the current price after inflation.
- CP = current price after inflation
- IP = initial price before inflation
- IR = inflation rate as a percentage
The calculator can solve for any one missing value when you enter the other two values.
- To find current price: enter the initial price and inflation rate.
- To find initial price before inflation: enter the current price and inflation rate.
- To find inflation rate: enter the initial price and current price.
Common Inflation Rate Effects
This table shows how different inflation rates affect an item that originally cost $100.
| Inflation Rate | Initial Price | Current Price | Increase |
|---|---|---|---|
| 2% | $100.00 | $102.00 | $2.00 |
| 5% | $100.00 | $105.00 | $5.00 |
| 10% | $100.00 | $110.00 | $10.00 |
| 25% | $100.00 | $125.00 | $25.00 |
Reverse Inflation Examples
Example 1: Find the initial price before inflation
You know the current price is $120 and the inflation rate is 20%.
The initial price before inflation was $100.00.
Example 2: Find the inflation rate
You know the initial price was $80 and the current price is $92.
The inflation rate was 15%.
Reverse Inflation Calculator FAQ
What does reverse inflation mean?
Reverse inflation means working backward from a price after inflation to find the earlier price before inflation. For example, if an item costs $150 now after 25% inflation, reverse inflation can show that the original price was $120.
How do you calculate the original price before inflation?
Divide the current price by 1 plus the inflation rate written as a decimal. For example, with a current price of $210 and inflation of 5%, calculate $210 / 1.05. The original price was $200.
Can the inflation rate be negative?
Yes. A negative inflation rate means the price decreased instead of increased. This is often called deflation. For example, if a price falls from $100 to $90, the inflation rate is -10%.
