Finance
Inflation Calculator
See how inflation changes the value of money over time. Adjust an amount between any two years using CPI-U data.
Guide
How to use the Inflation Calculator
The Inflation Calculator helps you make a quick estimate, compare scenarios, and understand the numbers behind the result. It is designed for fast planning, with enough context to make the answer useful instead of just a number.
- Enter the amounts, rates, and time period that match the scenario you want to model.
- Review the main result first, then scan the supporting totals to understand what drives it.
- Change one input at a time to compare payments, interest, growth, savings, or break-even points.
Method
How this calculator works
It adjusts purchasing power across years using Consumer Price Index style inflation math.
This calculator is useful for understanding how the real value of money changes over time.
Because assumptions matter, try a few values that represent optimistic, typical, and conservative cases.
Financial results are estimates. Actual loan terms, taxes, fees, rates, and market returns can change the final outcome.
Example
Worked example
Suppose you keep $50,000 in an account earning nothing while inflation runs at 3%. After 15 years its purchasing power falls to about $32,000 in today's terms — a third of the value gone without the balance ever changing. Run the same amount at 2% versus 4% inflation in the calculator to see how sensitive the outcome is.
FAQ
Common questions
What inflation rate should I assume for planning?
The US Federal Reserve targets 2%, and long-run US inflation has averaged close to 3% per year. Using 2.5%–3% for long-term planning is a reasonable middle ground; the calculator lets you test both ends.
How much does inflation erode money over time?
At 3% inflation, $1,000 today has the purchasing power of about $744 in ten years and about $554 in twenty. That halving over two decades is why holding large amounts of cash for long horizons quietly loses value.
What is the difference between nominal and real value?
Nominal is the number on the bill; real is what it buys. A 5% investment return during 3% inflation is roughly a 2% real return — inflation-adjusting both sides keeps comparisons across years honest.
What information do I need for the Inflation?
You usually need amount, starting year, ending year, and inflation assumptions. You can change the inputs and recalculate as many times as needed.
How does the Inflation calculate the result?
It adjusts purchasing power across years using Consumer Price Index style inflation math.
Are the results exact?
Financial results are estimates. Actual loan terms, taxes, fees, rates, and market returns can change the final outcome.
Related
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Sources