Inflation Calculator

How to Use This Inflation Calculator

Using the Inflation Calculator is straightforward. Enter any dollar amount in the "Amount" field, choose the year the money was in (From Year), then choose the year you want to compare it to (To Year). Click "Calculate" and the tool will instantly show you the equivalent purchasing power, adjusted for cumulative inflation using official CPI data from 1913 through 2025.

The line chart below the result illustrates how the value of your amount changed year by year across the selected range. You can see the impact of high-inflation periods like the 1940s, the 1970s oil crisis era, and the post-pandemic surge of 2021–2022 at a glance.

You can use it to compare any two years — for example, what is $100 from 1970 worth in 2025? Or what was $500 in 1985 equivalent to by 2000? This makes it equally useful for historical research, financial planning, or satisfying everyday curiosity about prices.

Salary Inflation Calculator

The Inflation Calculator doubles as a powerful salary comparison tool. If you were earning $45,000 in 2005 and want to know what that salary is worth in today's dollars, simply enter 45000 in the Amount field, 2005 as the From Year, and 2025 as the To Year. The result tells you exactly what your 2005 salary would need to be in 2025 to maintain the same standard of living.

This is especially useful when negotiating raises, evaluating a job offer, or comparing compensation across different time periods. A salary that seemed generous a decade ago may have lost significant real purchasing power due to cumulative inflation — and this calculator makes that immediately visible.

HR professionals and job seekers can also use this tool to benchmark historical pay data. For example, a $60,000 salary offered in 2015 is equivalent to roughly $80,000 in 2025 dollars — a 33% inflation-adjusted gap that is easy to miss without this kind of analysis.

What Is Inflation?

Inflation is the rate at which the general level of prices for goods and services rises over time, causing the purchasing power of currency to fall. In simple terms, when inflation is at 3%, a basket of groceries that cost $100 today will cost $103 a year from now. Over decades, even modest annual inflation can dramatically reduce the real value of money.

Inflation is driven by a variety of factors, including an increase in the money supply, rising production costs (cost-push inflation), strong consumer demand (demand-pull inflation), and supply chain disruptions. Events like wars, oil shocks, or global pandemics can cause sudden spikes in inflation, as seen in the late 1970s and again in 2021–2022.

The U.S. Federal Reserve targets a low and stable inflation rate, which it considers consistent with price stability and maximum employment. When inflation climbs significantly above this target, the Fed typically raises interest rates to slow economic activity and bring prices back under control.

How Is Inflation Calculated?

In the United States, inflation is primarily measured using the Consumer Price Index (CPI), published monthly by the U.S. Bureau of Labor Statistics (BLS). The CPI tracks the prices of a fixed "basket" of goods and services — including food, housing, clothing, transportation, healthcare, and recreation — that represents typical household spending patterns.

To calculate the annual inflation rate, the BLS compares the CPI value at the end of one year to the same period of the prior year. If the CPI was 260 in December 2023 and 268 in December 2024, the annual inflation rate would be approximately 3.1% — the percentage increase between those two values.

The data used in this calculator is sourced from the Federal Reserve Bank of Minneapolis, which maintains historical CPI-based inflation rate records going back to 1913. Our tool builds a cumulative price index from this annual data, allowing accurate purchasing power comparisons across any two years in the range.

Historical US Inflation Rates by Decade

The table below shows the average annual inflation rate for each decade since 1913, calculated from official CPI data.