Inflation Calculator

Inflation Calculator with U.S. CPI Data

Calculates equivalent U.S. dollar value from 1913 to 2026 using average CPI data for all urban consumers.

$ Amount

From Month

From Year

To Month

To Year

Forward Flat Rate Inflation Calculator

Calculates inflation based on a certain average inflation rate after some years.

$ Amount

Inflation Rate %

After (years)

Financial Calculators

Backward Flat Rate Inflation Calculator

Calculates the equivalent purchasing power of an amount some years ago based on a certain average inflation rate.

$ Amount (now)

Inflation Rate %

Years Ago

$74.41

$100 now equals $74.41 of purchasing power 10 years ago with an average inflation rate of 3%.

All Results Summary

CPI-Based Inflation (U.S. Historical Data)

Equivalent value:—

Enter values and calculate to see result.

Forward Flat Rate (Future Value)

Future equivalent:—

Enter values and calculate to see result.

Backward Flat Rate (Past Purchasing Power)

Past equivalent:$74.41

$100 now = $74.41 ten years ago at 3% inflation.

About Inflation

Inflation is the rate at which the general level of prices for goods and services rises over time, eroding purchasing power. The Consumer Price Index (CPI) measures the average change over time in prices paid by urban consumers for a market basket of goods and services. The Federal Reserve targets 2% annual inflation as healthy for the economy.

Inflation Formulas

Forward: FV = PV × (1 + r)ⁿ
Backward: PV = FV ÷ (1 + r)ⁿ
CPI: Adj = Amt × (CPI_to ÷ CPI_from)

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