US Inflation Calculator

Calculate the buying power of the dollar between two years.

Calculation Details
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About the US Inflation Calculator

Inflation is the rate at which the general level of prices for goods and services is rising, and subsequently, purchasing power of currency is falling. This calculator uses historical data from the U.S. Bureau of Labor Statistics to show how the value of the dollar has changed over time. By entering an amount and selecting a start and end year, you can see the real-world impact of inflation on your money and understand its historical context.

How is Inflation Calculated?

This calculator uses the Consumer Price Index (CPI-U), which is the most widely used measure of inflation. The formula to adjust an amount for inflation is:

$ \text{End Amount} = \text{Start Amount} \times \frac{\text{End Year CPI}}{\text{Start Year CPI}} $

  • Start Amount: The dollar value you want to convert.
  • Start Year CPI: The Consumer Price Index for the starting year.
  • End Year CPI: The Consumer Price Index for the ending year.

Frequently Asked Questions (FAQ)

What is the Consumer Price Index (CPI)?

The Consumer Price Index (CPI) is a measure that examines the weighted average of prices of a basket of consumer goods and services, such as transportation, food, and medical care. It is calculated by the U.S. Bureau of Labor Statistics (BLS) and is a primary way to measure changes in the cost of living and, therefore, inflation.

Why is my calculation slightly different from other calculators?

Small differences can arise depending on the specific CPI data used. This calculator uses the annual average of the CPI for All Urban Consumers (CPI-U). Some other calculators might use the CPI from a specific month (like December) of each year, which can lead to slightly different results. For consistency, we use the annual average.

Does inflation affect everyone the same way?

No. While the CPI provides a general measure, an individual's personal inflation rate can be very different. It depends heavily on their own spending habits. For example, if the price of gasoline rises sharply but you don't own a car, your personal inflation rate will be lower than the headline CPI number.