How the Inflation Calculator Works
Inflation gradually reduces what your money can buy. This calculator shows you the impact in two directions: forward (what will today's money be worth in the future?) and backward (how much would you need in the future to match today's purchasing power?).
Enter an amount, an inflation rate, and a time period to see the year-by-year decline in purchasing power visualized on an interactive chart.
Disclaimer: This calculator uses a constant inflation rate for projections. Actual inflation varies year to year. The default 3% rate is based on long-term historical averages.
Understanding Inflation
Inflation is the rate at which the general price level of goods and services rises over time. When inflation goes up, each dollar buys fewer goods and services. Understanding inflation is essential for long-term financial planning.
Historical Inflation Rates
The U.S. has historically averaged about 3% annual inflation over the past century. However, inflation has varied significantly:
- 1970s-80s: High inflation, peaking at 13.5% in 1980
- 1990s-2010s: Low inflation, typically 1.5-3%
- 2021-2022: Inflation surged to 7-9% post-pandemic
- 2024-2025: Returning toward the Fed's 2% target
Why Inflation Matters for Your Finances
- Savings: Cash sitting in a low-yield account loses value to inflation every year
- Retirement: What costs $4,000/month today could cost $7,200 in 20 years at 3% inflation
- Investments: Your returns must beat inflation to grow in real terms
- Salary: A raise below the inflation rate is effectively a pay cut
How to Protect Against Inflation
- Invest in stocks: Equities historically outpace inflation over the long term
- Consider TIPS: Treasury Inflation-Protected Securities adjust with the CPI
- Own real assets: Real estate and commodities tend to appreciate with inflation
- Avoid excess cash: Keep only what you need for emergencies in low-yield accounts
Frequently Asked Questions
What inflation rate should I use?
The default 3% is a reasonable long-term average for the U.S. For conservative planning, use 3-4%. For recent experience, you might use the current CPI rate. The Federal Reserve targets 2% inflation.
What's the difference between the two calculation directions?
"Future Value of Today's Money" shows what your current money will be worth in purchasing power terms. "Today's Equivalent of Future Money" tells you how much you'd need in the future to have the same buying power as today's amount.
How does inflation affect my investments?
If your investment returns 7% and inflation is 3%, your real return is approximately 4%. Use our compound interest calculator alongside this tool to ensure your investment growth outpaces inflation.