Calculator inputs
Enter the current price, annual inflation rate, and number of years to see the estimated future price.
Enter the amount in the currency you are using. Keep the same currency across money fields.
Enter the expected annual inflation percentage, not a decimal. For example, enter 3 for 3%.
Enter the length of the period using the unit shown in the label.
Formula
Inflation Increase = Future Price - Current Price
This formula uses compound growth to project how a price increases year over year at a constant inflation rate. The result shows the estimated cost after the specified number of years.
Worked examples
$100 at 3% for 10 years: Future price = $134.39, increase = $34.39
$50 at 5% for 20 years: Future price = $132.66, increase = $82.66
$250 at 2.5% for 5 years: Future price = $282.85, increase = $32.85
Why inflation matters
Inflation erodes purchasing power over time. A dollar today buys more than a dollar will in the future. Understanding inflation is crucial for retirement planning, salary negotiations, long-term contracts, and investment decisions.
This calculator assumes a constant annual inflation rate, which is useful for quick estimates. In reality, inflation fluctuates year to year. For historical comparisons, look up actual CPI data for your country. For forward projections, central bank inflation targets (typically 2-3% in developed economies) provide a reasonable baseline.
Use inflation to reality-check returns
Inflation affects buying power, savings goals, and investment returns. Compare this result with the Investment Return Calculator, Retirement Savings Calculator, and Compound Interest Calculator.
Important: Finance calculators are estimates only. Check real lender, bank, tax, investment, or adviser information before making decisions.
Accuracy and use of results
CalculatorWorks aims to make calculations clear and practical. We use standard calculation methods where possible, explain assumptions in plain language, and encourage users to verify important results before relying on them.
Inflation calculator FAQ
Why does the calculator compound inflation?
Prices usually rise from the latest price level, not the original starting price, so inflation is commonly modelled as compound growth.
What inflation rate should I enter?
Use a rate that matches the scenario you are planning. A low rate can model normal conditions, while a higher rate can stress-test household or retirement plans.
Can inflation be negative?
Some economies can experience deflation, where prices fall. If the calculator accepts a negative rate, it can model that scenario, but sustained deflation is less common.
Is this the same as investment return?
The formula is similar, but the meaning is different. Inflation grows costs, while investment return grows capital. Comparing both helps estimate real purchasing power.
Compare inflation with savings and returns
A future cost estimate becomes more useful when you compare it with savings growth and investment returns. If your savings grow slower than inflation, your real purchasing power may fall.
Useful ways to use this calculator
- Estimate the future cost of recurring household expenses.
- Stress-test savings goals against higher price growth.
- Compare nominal investment growth with inflation-adjusted buying power.
- Build more realistic retirement or education cost assumptions.
Inflation worked examples
Example 1: A $100 item growing at 3% inflation for 10 years becomes about $134.39. The price increase is not simply $30 because inflation compounds.
Example 2: A $2,500 annual expense growing at 4% for 15 years becomes about $4,502.36. This is why long-term plans should account for rising costs.
Inflation and purchasing power
Inflation reduces purchasing power because the same amount of money buys fewer goods and services over time. A future price estimate is useful for planning school fees, household budgets, retirement spending, travel costs, and long-term savings targets.
The calculator assumes a constant annual inflation rate. Real inflation changes year by year, so test several scenarios rather than relying on one fixed number.