What this calculator does
Inflation is the sustained rise in the general price level: as years go by, the same amount of Chilean pesos buys less and less. This tool uses Chile’s Consumer Price Index as published by the World Bank (indicator FP.CPI.TOTL, annual average, base 2010 = 100) to answer a practical question: how many pesos of one year are equivalent to a given amount from another year?
The CPI series is baked into the tool, so everything runs locally in your browser with no network requests. Coverage runs from 1977 to 2025. The World Bank series technically starts in 1970, but the values before 1977 belong to Chile’s hyperinflation of the early seventies and are so tiny on the 2010 base that they cannot be stored with two-decimal precision, so they are excluded.
How to use it
- Type the amount in Chilean pesos you want to convert (say,
1000). - Pick the origin year — the year that amount belongs to.
- Pick the target year (2025 by default, the latest available).
You get three outputs: the CPI-adjusted equivalent, the cumulative inflation between the two years, and the annualized rate — the constant yearly inflation that would produce that cumulative change. Choosing the same year on both sides yields 0%, and you can also convert “backwards” (a recent amount expressed in older pesos).
The formula
With CPI(year) as the index value for each year:
Equivalent = amount × CPI(target) ÷ CPI(origin)
Cumulative inflation (%) = (CPI(target) ÷ CPI(origin) − 1) × 100
Annualized rate (%) = ((CPI(target) ÷ CPI(origin))^(1 ÷ years) − 1) × 100
Chile’s inflation, year by year
Year-over-year change of the annual-average CPI in the World Bank series (last 10 years):
| Year | Inflation |
|---|---|
| 2016 | 3.78% |
| 2017 | 2.19% |
| 2018 | 2.43% |
| 2019 | 2.56% |
| 2020 | 3.05% |
| 2021 | 4.52% |
| 2022 | 11.65% |
| 2023 | 7.58% |
| 2024 | 4.30% |
| 2025 | 4.21% |
The 2022 spike stands out: like much of the world after the pandemic, Chile went through its highest inflation in decades, followed by a gradual return toward the Central Bank’s target range of 3% plus or minus one point.
Worked example
What are 1,000 pesos from 2010 worth today?
- CPI in 2010:
100(the base year of the series). - CPI in 2025:
185.48. - Equivalent:
1000 × 185.48 ÷ 100 = 1,855 pesos(rounded). - Cumulative inflation:
(185.48 ÷ 100 − 1) × 100 = 85.48%. - Annualized rate:
(1.8548^(1/15) − 1) × 100 = 4.20%per year over 15 years.
In other words, what cost 1,000 pesos in 2010 costs about 1,855 pesos today — prices nearly doubled in fifteen years.
Frequently asked questions
Where does the data come from and how often is it updated?
From the World Bank indicator FP.CPI.TOTL (CPI, annual average, base 2010 = 100), retrieved in July 2026. The World Bank sources it from Chile’s national statistics institute (INE) and refreshes it once a year, so the latest year available is 2025 and a newly finished year can take months to show up.
Why do the numbers differ from the December inflation quoted in the news?
Because the World Bank series uses the annual average of the CPI, while headlines usually quote the INE’s December-over-December change. In 2022, for instance, the annual average came to 11.65% while the December reading exceeded 12%. Both are correct — they simply measure different things.
Why does the series start in 1977?
Chile experienced hyperinflation in the early seventies, with rates above 400% per year in 1973-1974. On the 2010 = 100 base, the index for those years sits below 0.01, which cannot be represented with two decimals without huge rounding errors. From 1977 onwards the precision is sound.
Is this a substitute for the UF or the INE’s official calculator?
No. The UF (Unidad de Fomento) is adjusted daily using the monthly CPI and is Chile’s legal standard for contracts, and the INE publishes its own calculator with monthly data. This tool works with annual averages and is meant as a quick reference for comparing amounts across years, not for contractual adjustments.