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Inflation Calculator

Looking for a inflation calculator value of money by year? This free tool gives you what money from any year since 1913 is worth in another year. Just enter your numbers and press Calculate — results are instant.

How to Use This Inflation Calculator

Inflation means the same amount of money buys less over time. This calculator uses US CPI (Consumer Price Index) averages built into it, from 1913 to 2025, to compare what money was worth in two different years: the equivalent value is your amount times the CPI of the target year divided by the CPI of the starting year. For years outside that range it projects forward using the average inflation rate you enter.

Formula Used

Equivalent value = amount × CPI(to year) ÷ CPI(from year), using US CPI averages built into the calculator (1913–2025). Years outside that range use your assumed average inflation rate.

Worked Example

Example: Amount $100 · From year 2000 · To year 2025

  1. The calculator's CPI values are 172.2 for 2000 and 322 for 2025.
  2. Equivalent value = $100 × 322 ÷ 172.2 = $186.99.
  3. That is a cumulative change of +86.99%, or about 2.54% a year on average — so $100 in 2000 buys what $186.99 buys in 2025.

Equivalent in 2025: $186.99

Frequently Asked Questions

What is CPI?

The Consumer Price Index tracks the average price of a basket of everyday goods and services — food, housing, transport, healthcare and more. When the CPI rises, money buys less, and that is inflation.

Why does the calculator only cover 1913 to 2025?

Those are the years with CPI data built into it. For years outside that range it projects using the average inflation rate you enter, which you can change.

Can I project into the future?

Yes. Enter a future year and an assumed average inflation rate, and the calculator estimates what today's money will be worth then. It is an estimate — nobody knows future inflation exactly.

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