Inflation silently erodes purchasing power over time—$100,000 today will have the buying power of only about $55,000 in 20 years at 3% inflation. Our inflation calculator uses historical CPI data to show how the real value of money changes, helping you plan savings, retirement income, and investment returns in real dollars.
The Federal Reserve targets 2% annual inflation as a healthy economic level. Over the past 100 years, average US inflation has been about 3.1%. The 2021–2022 surge hit 7–9% before subsiding. For long-term planning, using 2.5–3% is a reasonable conservative assumption.
The Federal Reserve primarily uses the Personal Consumption Expenditures (PCE) price index. The Bureau of Labor Statistics publishes the Consumer Price Index (CPI), which covers a basket of goods and services consumed by urban households. CPI-W is used to adjust Social Security benefits annually (COLA).
Real rate of return = nominal return minus inflation rate. If your investments return 7% annually and inflation is 3%, your real return is about 4%. This is what matters for long-term purchasing power—nominal returns can be misleading without accounting for inflation.
A retiree spending $60,000/year at age 65 will need roughly $108,000/year by age 85 to maintain the same lifestyle at 3% inflation. Always model retirement income needs in today's dollars but plan contributions and withdrawals with inflation adjustments built in.
Treasury Inflation-Protected Securities (TIPS) adjust principal for CPI automatically. I-Bonds offer inflation-adjusted returns. Real estate, commodities, and dividend-growth stocks historically keep pace with or exceed inflation. Cash and long-term fixed bonds lose real value during inflationary periods.
Hyperinflation is typically defined as more than 50% monthly price increases (1,000%+ annually). Historical examples include Weimar Germany (1923) and Zimbabwe (2000s). The US dollar's reserve currency status, Federal Reserve independence, and institutional strength make hyperinflation extremely unlikely but not impossible.