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Quaestio

Inflation

Enter an amount and two years, and see what the amount comes to.

Comes to

187.97

100 in 2000 comes to this amount in 2025.

  • Total price rise88%
  • Per year on average2.6%
  • Prices had doubledNot yet within the series

The annual rate is the geometric mean, the rate that produces the same total change. A plain average of the yearly rates comes out too high, because per cent on per cent does not add up.

The amount over time

20002025

The purchasing power of the amount expressed in each year’s money.

Year by year

YearAmountOn the year before
20001001.2%
2005108.162.1%
2010122.752.5%
2015136.20.4%
2020148.291%
2025187.973.9%

The index measures an average basket for a whole country. Rent and food have risen far more than electronics, which have in several cases become cheaper in cash terms, so your own inflation may differ from the table.

Source: World Bank, consumer price index (CC BY 4.0).

Updated 27 September 2026 · latest year 2025 · next year expected around July 2027

Does a contract name a particular month’s index, such as CPI for October? Then work with monthly figures rather than annual averages.

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How it works

The conversion rests on the consumer price index, which measures what it costs to buy one and the same basket at different times. An amount is moved by multiplying it by the ratio between the index for the two years.

So it says what is needed to buy the same thing, not what a particular item costs. Rent and food have risen far above the average, while electronics have in several cases become cheaper in cash terms even as everything else grew dearer.

The index is an average for a whole country. Anyone who spends a large share of their income on something that has risen faster than the average has had higher inflation than the table shows, and the other way round.

The annual rate is the geometric mean, the rate that repeated over the years produces the same total change. Adding up the yearly rates and dividing by the number of years gives too high a figure, because per cent on per cent does not add up.

The series go back to 1960 and are annual averages. For Germany they refer to West Germany before 1991 and to the reunified country after, which is the usual handling but worth knowing when comparing across that line.

Reckoning across a currency reform still means something: the index measures prices and not banknotes, so an amount in Deutschmarks from 1980 can be expressed in today’s euros.

The table sits in the page and is not fetched when you visit. It is updated once a year, when the World Bank publishes new figures.

Sources

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