Inflation Calculator Online — Free Tool
Understand the impact of inflation on purchasing power over time by adjusting historical or future monetary values.
Inflation Calculator
Shows how inflation changes the value of money over time.
About this tool
Inflation erodes purchasing power: the same nominal amount buys less over time. This calculator shows what a sum today would be worth in future dollars—or what past money equals in today's terms—at a given annual inflation rate.
Use it to adjust savings goals, salary expectations, or retirement projections so you plan in real rather than nominal terms.
Common use cases
- Adjusting retirement targets for rising living costs
- Comparing historical prices to present-day equivalents
- Stress-testing long-term savings against inflation assumptions
- Explaining purchasing power to stakeholders or students
How to use
- Enter the amount you want to adjust.
- Set the annual inflation rate and number of years forward or backward.
- Choose whether to project future value or deflate to today's purchasing power.
- Review the adjusted amount and implied loss or gain in buying power.
This page is available at /tools/inflation-calculator/.
Understanding the result
- Higher inflation rates compound purchasing-power loss exponentially over long periods.
- Future value shows how much nominal money you'd need later to match today's buying power.
- Present value (deflation) shows what historical nominal amounts equal in today's dollars.
- Even moderate inflation (2–3%) significantly shifts multi-decade financial plans.
Related tools
FAQ
What inflation rate should I use?
Central banks often target ~2%. Use recent CPI for your country or a conservative 3–4% for long-range planning.
How does inflation affect savings?
Cash earning less than inflation loses real value. Investments must outpace inflation to grow purchasing power.
What is purchasing power?
The quantity of goods and services a unit of money can buy. Inflation reduces purchasing power over time.
Is this the same as CPI?
The math mirrors CPI-style compounding. Official CPI uses a basket of goods; this tool uses your chosen rate.