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About Inflation Calculator Online
This tool calculates the effect of inflation on purchasing power. Enter an amount, a start year and end year, and an average annual inflation rate, and it shows what the equivalent value would be in the target year — both forward (today's dollars to future dollars) and backward (historical dollars to today's value).
Inflation steadily erodes purchasing power. Even modest inflation of 3% per year roughly halves what a fixed amount can buy over 24 years. Understanding the long-term impact is essential when planning retirement, evaluating salary growth, comparing prices across decades, or projecting business costs.
If you don't know the historical inflation rate to use, you can input a recent average (around 3% in the US over the last century, or 2% in Eurozone targets). The tool itself is rate-agnostic so it works in any country or currency.
How to use this tool
How to project the real-terms value of money after N years
Enter the starting amount
"Amount" is the present-day value you want to project — a salary, a savings balance, a quoted price. Currency-neutral; just be consistent in your interpretation.
Annual inflation %
"Annual inflation %" is the average yearly rate. The Fed's long-run target is 2; recent US prints have been higher (5-9 in 2022, ~3 in 2024). Pick a number you can defend if asked.
Years
"Years" is the projection horizon. The tool compounds the loss annually — `Amount × (1 + rate/100)^years`. That `^years` factor is what makes inflation eat way more than the headline rate suggests over a decade.
Press Run
Result returns a single `futureValue` (what the same amount needs to be in N years to keep the same purchasing power), rounded to 2 decimals. If you wanted today's value of a future amount, invert: divide rather than multiply.