Inflation Calculator

Calculate the purchasing power of money over time. See how inflation erodes — or preserves — the real value of your dollars.

Amount & Time Period

Initial Amount

Start Year

End Year

Inflation Rate

Select Average Annual Rate

Original Value

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Adjusted Value

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Cumulative Inflation

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Annual Rate Used

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Years

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Value Lost to Inflation

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Purchasing Power

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Real Return (at 7%)

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Year-by-Year Breakdown

Year	Equivalent Value	Inflation That Year	Cumulative	Purchasing Power

Learn

Understanding Inflation & Purchasing Power

Inflation is the rate at which the general level of prices for goods and services rises over time, eroding purchasing power. When inflation is 3%, a basket of goods costing $100 today will cost $103 a year from now — meaning your dollar buys less.

Our Inflation Calculator lets you see exactly how much a given amount of money in one year is worth in another. It uses compound interest mathematics — the same formula that governs investment growth, applied in reverse to show value erosion.

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Purchasing Power Erosion

At the US historical average of 3% inflation, $1,000 in 2000 has the equivalent purchasing power of about $1,806 in 2024 — meaning prices roughly doubled over that period. What cost $1,000 in 2000 costs ~$1,806 today.

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How the CPI Works

The Consumer Price Index (CPI) measures inflation by tracking the price of a fixed "basket" of goods: housing, food, transportation, healthcare. When the CPI rises, it means Americans are paying more for the same things.

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Protecting Against Inflation

Historically, equities (stocks) have provided a ~7% real (inflation-adjusted) annual return. Real estate, commodities, and TIPS bonds also serve as inflation hedges for long-term investors.

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The Fed's 2% Target

The US Federal Reserve targets 2% annual inflation as a healthy economic balance — low enough to preserve purchasing power, but high enough to encourage spending and investment rather than deflation (falling prices), which can be economically damaging.

FAQ

Frequently Asked Questions

How is inflation calculated?

The formula is: Adjusted Value = Initial Amount × (1 + Rate)ⁿ, where Rate is the annual inflation rate as a decimal and n is the number of years. For example, $1,000 at 3% inflation for 10 years = $1,000 × (1.03)¹⁰ ≈ $1,344. This means $1,000 in 2015 has the same purchasing power as $1,344 in 2025.

What is the difference between nominal and real value?

Nominal value is the face amount — $1,000 is $1,000. Real value adjusts for inflation to show true purchasing power. If your salary rose from $50,000 to $52,000 (a 4% raise) but inflation was 5%, your real salary actually fell by 1%. Understanding this distinction is critical for evaluating raises, investment returns, and economic statistics.

What causes high inflation?

Inflation is caused by: Demand-pull (too much money chasing too few goods), Cost-push (rising production costs, like oil prices), Built-in inflation (wage-price spirals), and Monetary policy (excess money supply). The 2021–2023 US inflation surge was driven by supply chain disruptions, pandemic stimulus spending, and energy price shocks.

How does inflation affect savings and investments?

If your savings account earns 1% interest but inflation is 3%, your real return is −2% — your money is losing purchasing power. To protect savings: invest in assets that beat inflation (diversified stock portfolios historically return ~7% nominally, ~4% real), consider I-bonds or TIPS, and avoid holding large cash balances long-term.

What is the Rule of 72 for inflation?

The Rule of 72 estimates how many years it takes for prices to double (or purchasing power to halve). Divide 72 by the inflation rate: at 3% inflation, prices double in roughly 72 ÷ 3 = 24 years. At 6% inflation, just 12 years. This rule is also used to estimate investment doubling time — at 7% returns, your money doubles in ~10 years.