What is an inflation calculator?

An inflation calculator converts an amount of money from one year into another year's money, using the consumer price index to measure how much prices changed in between. It tells you what a historical amount is worth in today's terms.

How far back does the data go?

It depends on the country. British price records in this dataset begin in 1751 and US records in 1776, which are among the longest continuous series available anywhere. Most other countries begin in the 1960s. In total the site covers 2,732 country-years of data.

Which currencies are supported?

This site covers 28 currencies, including the US dollar, euro, British pound, Japanese yen, Indian rupee, Turkish lira, Brazilian real and Mexican peso. The mobile app covers more than 150.

Where does the CPI data come from?

From 1960 onward, the World Bank's consumer price inflation series, which it collects from national statistics agencies. The current year comes from the IMF World Economic Outlook, which publishes before national agencies close their annual figures. Years before 1960 come from the Jordà-Schularick-Taylor Macrohistory Database, and the earliest US and UK years from long-run historical price indices. Figures are annual averages, which is the standard basis for year-to-year historical comparisons.

Is the calculator free?

Yes. Every calculator and every data table on this site is free to use, and each country's full CPI series can be downloaded as JSON.

Inflation Calculator

Convert money between any two years across 28 currencies. British price records reach back to 1751 and American records to 1776.

28Currencies

2,732Years of data

1751Earliest record

4.5 from 940App rating

Try it with US dollars

Enter an amount and pick two years. For other currencies, choose a calculator below.

Calculate inflation

Amount (USD)

Start year

End year

Results

$100.00 in 2001 is worth $187.76 in 2026

Annual inflation rate 2.55%

Cumulative inflation 87.76%

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How the calculator works

The calculator uses the consumer price index, which tracks the cost of a fixed basket of goods and services over time. Dividing the index for your end year by the index for your start year gives the ratio prices changed by, and multiplying your amount by that ratio converts it into the later year's money.

Because it measures an average across a whole basket, CPI describes the general price level rather than any single product. Rent, university tuition and computers have all moved very differently from the average over the past few decades, so treat the result as a general-purpose comparison rather than a precise prediction for one specific thing.

Why adjust for inflation?

Comparing money across decades without adjusting for inflation is misleading. A salary that sounds generous in 1975, a house price from 1990, or a film's box office takings from 1960 only become comparable to today once they are converted into the same year's money. That conversion is what this calculator does.

Also available as an app

The app's home screen showing the calculator

150+ currencies

Five times the coverage of this website, including currencies with no dedicated page here.

Charts and history

Every result comes with inflation charts, and your calculations are saved for later.

Works offline

The full dataset is stored on your phone, so calculations work without a connection.

Frequently asked questions

What is an inflation calculator?: An inflation calculator converts an amount of money from one year into another year's money, using the consumer price index to measure how much prices changed in between. It tells you what a historical amount is worth in today's terms.
How far back does the data go?: It depends on the country. British price records in this dataset begin in 1751 and US records in 1776, which are among the longest continuous series available anywhere. Most other countries begin in the 1960s. In total the site covers 2,732 country-years of data.
Which currencies are supported?: This site covers 28 currencies, including the US dollar, euro, British pound, Japanese yen, Indian rupee, Turkish lira, Brazilian real and Mexican peso. The mobile app covers more than 150.
Where does the CPI data come from?: From 1960 onward, the World Bank's consumer price inflation series, which it collects from national statistics agencies. The current year comes from the IMF World Economic Outlook, which publishes before national agencies close their annual figures. Years before 1960 come from the Jordà-Schularick-Taylor Macrohistory Database, and the earliest US and UK years from long-run historical price indices. Figures are annual averages, which is the standard basis for year-to-year historical comparisons.
Is the calculator free?: Yes. Every calculator and every data table on this site is free to use, and each country's full CPI series can be downloaded as JSON.

Get the Inflation Calculator app

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150+ currencies, offline access, saved calculations and charts, for iPhone, iPad and Android.