Calculate how inflation changes purchasing power over time. Find out what money from any year is worth today — or what today's dollars were worth in the past.
💡 Quick Answer: $100 in 1990 has the same purchasing power as approximately $240 in 2025 — prices have roughly 2.4× over 35 years, with an average annual inflation rate of 2.6%.
Calculate Inflation
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📚 Source: U.S. Bureau of Labor Statistics, Consumer Price Index (CPI-U), Annual Averages 1913–2025.
What Is Inflation?
Inflation is the rate at which prices for goods and services rise over time, reducing the purchasing power of money. It's measured using the Consumer Price Index (CPI), which tracks the average price change for a basket of consumer goods.
The US Bureau of Labor Statistics (BLS) has published CPI data since 1913. Moderate inflation (2-3% per year) is considered normal and healthy for an economy. High inflation (above 5-6%) erodes savings and wages. Deflation (negative inflation) can signal economic recession. The Federal Reserve targets 2% annual inflation as its long-term goal.
How Does Inflation Affect Savings?
Inflation erodes purchasing power — if your savings earn less than the inflation rate, you're losing money in real terms. A savings account earning 2% when inflation is 3% has a real return of -1%.
Over 30 years at 3% average inflation, $100 loses about 59% of its purchasing power — meaning you'd need $243 to buy what $100 bought 30 years ago. This is why financial planning should always account for inflation, and why investments that outpace inflation (stocks, real estate, inflation-protected bonds) are essential for long-term wealth preservation.
What Causes Inflation?
Inflation is primarily caused by demand-pull factors (too much money chasing too few goods), cost-push factors (rising production costs), and monetary policy (money supply expansion).
Demand-pull inflation occurs during economic booms when consumer spending outpaces production capacity. Cost-push inflation results from rising raw material costs, supply chain disruptions, or energy price spikes. Central banks influence inflation through interest rates and money supply — lower rates encourage spending (inflationary), higher rates encourage saving (deflationary).
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Important Notes: (1) This calculator uses US CPI-U data only (Bureau of Labor Statistics, 1913–2025). Values do not apply to other countries — inflation rates in the EU, Romania, UK, or other regions differ significantly. (2) CPI data must be updated annually — the most recent year (2025) may use preliminary estimates. (3) CPI measures national average price changes and may not reflect your personal experience, which varies by location, spending habits, and lifestyle.
Understanding Inflation: How Your Money Loses Value Over Time
Inflation is the silent tax that erodes your purchasing power every single day. This calculator uses official US Consumer Price Index (CPI-U) data from the Bureau of Labor Statistics, spanning from 1913 to 2025 — over 112 years of economic history. Understanding inflation is essential for retirement planning, salary negotiation, investment decisions, and preserving your wealth.
The Cost of Inactivity
If you keep $10,000 under your mattress for 10 years at 3% average inflation, you will lose $2,626 in purchasing power. Your $10,000 will only buy what $7,374 buys today. Over 20 years, the loss grows to $4,562 — nearly half your money's value disappears. Over 30 years at the historical average of 3.1%, $10,000 retains only $3,970 in purchasing power. This is why keeping large amounts of cash uninvested is one of the most expensive financial decisions you can make.
Historical Inflation Patterns
US inflation has averaged 3.1% annually since 1913, but the variation is dramatic. The 1970s saw double-digit inflation peaking at 13.5% in 1980. The 2010s experienced historically low inflation of 1-2%. Post-pandemic inflation surged to 9.1% in June 2022 — the highest in 40 years — before moderating to 3-4% by 2024-2025. The Federal Reserve targets 2% annual inflation as its long-term goal, using interest rate adjustments as its primary tool.
How to Protect Your Money from Inflation
Investments that historically outpace inflation include: stocks (averaging 7-10% annual returns), real estate (averaging 3-5% appreciation plus rental income), Treasury Inflation-Protected Securities (TIPS, which adjust with CPI), and I-Bonds (currently offering competitive rates tied to inflation). High-yield savings accounts and CDs can help preserve purchasing power during periods of moderate inflation but rarely outpace it significantly.