Inflation Estimate Calculator
Explore future costs and purchasing power at a constant inflation rate you choose.
Your result
FINANCIALEnter your values and select calculate.
On this page How it works & practical examples
How to use the Inflation Estimate Calculator
Enter the cost of a purchase today and an annual inflation assumption. The future-cost result estimates how much money would be needed to buy the same item if prices followed that constant rate. The purchasing-power row answers the opposite question: how much an unchanged cash amount could buy in starting-year dollars. A negative rate illustrates deflation under the same mathematical model.
The calculation
Worked example
At an assumed 3% annual price increase, a $1,000 purchase would cost $1,343.92 after 10 years. Unchanged $1,000 cash would have about $744.09 of starting-year purchasing power.
Assumptions and limits
This page does not load historical CPI values or a current official rate. Inflation varies over time, and individual goods do not necessarily move with an economy-wide index. The rate must be above −100% so the price factor stays positive. Wages, interest, exchange rates and taxes are outside the model. Use published CPI data for a historical inflation comparison.
Common questions
Is 3% the current official inflation rate?
No. It is an editable example assumption, not a reported statistic or a forecast.
Why does the purchasing-power number fall?
When prices rise, unchanged money buys less. The tool divides the cash amount by the cumulative price-growth factor.