Inflation Calculator
Find the equivalent value of money across any time period.
Results update as you type.
This calculator is for illustrative purposes only. Actual rates, fees and terms vary by lender. Consult a qualified financial adviser before making borrowing decisions.
How it works
Inflation is the gradual rise in the general price level of goods and services over time, which means each dollar buys a little less with every passing year. This inflation calculator uses compound growth to translate any dollar amount across time — either forward to find what a sum today would cost in future dollars, or backward to express a historical price in current purchasing power terms. This inflation calculator compounds your chosen average annual inflation rate over the number of years between the start and end year. The US long-run average CPI inflation rate since 1913 is approximately 3.2%, with recent decades closer to 2–3% and the 2021–2023 surge hitting 7–9%. Inflation matters because it silently reduces the real return on savings accounts, erodes fixed incomes, and raises the cost of retirement. A retiree who needs $50,000 per year today will need roughly $90,000 twenty years from now at 3% inflation just to maintain the same lifestyle. Understanding the compounding erosion of purchasing power motivates holding growth assets rather than keeping savings in cash over long periods. The cumulative inflation percentage shows the total price level change across the entire period, while the purchasing power change figure reveals how much of the original value has been preserved or lost in real terms.
Future value = PV × (1 + r)^n | Past value = FV ÷ (1 + r)^n
For forward projection, multiply the starting amount by (1 + r) raised to the number of years n, where r is the annual inflation rate expressed as a decimal. This compounds the price increase year by year, matching how inflation actually accumulates. For reverse calculation, divide the future amount by the same factor to find the equivalent historical value. Both directions use the same exponential relationship — only the direction of the calculation changes.
Source:U.S. Bureau of Labor Statistics (CPI)
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter amount, start year, end year and avg. annual inflation rate.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Equivalent value updates instantly as you type — no button to press.
Frequently asked questions
What is a normal inflation rate?
The US Federal Reserve targets 2% annual inflation as the sweet spot — low enough to preserve purchasing power but high enough to discourage holding cash and encourage economic activity. The actual US long-run average since 1913 is closer to 3.2%. Inflation above 5–6% is generally considered elevated and prompts central bank tightening. Deflation — falling prices — sounds appealing but discourages spending and investment and can trigger recession, which is why central banks actively avoid it.
How does inflation affect savings and investments?
Inflation is the silent tax on money sitting in low-yield accounts. If your savings earn 1% interest and inflation runs at 3%, your real return is negative 2% — your money grows in nominal terms but shrinks in purchasing power. Stocks have historically outpaced inflation by roughly 7% annually after inflation, which is why equities are the primary long-run inflation hedge for most investors. TIPS and I Bonds directly adjust principal for CPI, offering inflation protection with lower expected returns.
What is hyperinflation and when does it happen?
Hyperinflation is typically defined as monthly inflation exceeding 50% — roughly 13,000% per year. It destroys the real value of savings and wages almost overnight and historically accompanies monetary crises where governments print money to fund deficits (Weimar Germany 1923, Zimbabwe 2008, Venezuela 2018). In hyperinflation environments, people rush to convert currency to goods or foreign assets as quickly as possible. The US has never experienced hyperinflation, though high inflation periods like the 1970s caused significant economic pain.
How does the CPI measure inflation?
The Consumer Price Index tracks the average price change of a fixed market basket of goods and services that typical urban households purchase, including food, housing, transportation, medical care, apparel, and recreation. The Bureau of Labor Statistics surveys thousands of retailers monthly, calculates the total cost of the basket, and compares it to the prior period. The CPI-U covers all urban consumers and is the most widely cited inflation measure. Critics note it imperfectly captures housing costs and quality improvements, but it remains the standard benchmark.
Is 7% inflation considered high?
Yes — 7% is well above the Fed's 2% target and not seen in the US since the early 1980s until 2021–2022. At 7% inflation, prices double roughly every 10 years. Workers with fixed salaries see their real wages fall, savers in cash lose purchasing power rapidly, and borrowers with fixed-rate loans benefit since they repay in cheaper future dollars. Central banks respond to such levels with interest rate hikes, which raise borrowing costs across the economy to reduce demand and cool prices.