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CPI Methodology

How SatsAtlas tracks and presents Consumer Price Index data from around the world.

What is CPI?

The Consumer Price Index (CPI) is a measure that tracks the average change in prices paid by consumers for a basket of goods and services over time. It is the most widely used indicator of inflation and deflation.

CPI is calculated by comparing the cost of a fixed basket of goods and services in a given period to the cost of that same basket in a designated base period. The result is expressed as an index number relative to the base period value of 100.

Governments, central banks, and economists rely on CPI to make monetary policy decisions, adjust wages, set tax brackets, and measure the real purchasing power of a currency. For everyday people, CPI tells you how much more (or less) your money buys compared to a reference point in the past.

Our Data

SatsAtlas sources CPI data from the World Bank, which aggregates official national statistics from central banks and statistical agencies worldwide.

Source

World Bank CPI Data

Baseline Year

Varies by country (2010 or 2015 = 100)

Update Frequency

Annual data points

We cover 50+ countries with historical CPI series going back decades. Data is refreshed as new annual figures are published by the World Bank, typically with a 6-12 month lag behind the most recent calendar year.

How to Read CPI

Understanding CPI values is straightforward once you know the baseline:

100

CPI of 100 means prices are exactly at the baseline year level. No cumulative inflation since that date.

120

CPI of 120 means prices have risen 20% cumulatively since the baseline year.

200

CPI of 200 means prices have doubled since the baseline. Your money buys half as much.

Year-over-Year Change = Inflation Rate

The annual inflation rate is calculated as the percentage change in CPI from one year to the next. For example, if CPI goes from 110 to 115 over a year, the inflation rate for that year is approximately 4.5%. This is the number most commonly cited in news reports about inflation.

Bitcoin Context

Why CPI matters for Bitcoin holders: CPI quantifies the silent tax that inflation imposes on anyone saving in fiat currency. When CPI rises, each unit of your national currency buys fewer goods and services. This is the fundamental problem that Bitcoin was designed to address.

Fiat inflation and purchasing power: Central banks around the world have expanded monetary supply dramatically. While official CPI targets are typically 2% per year, many countries experience far higher rates. Over time, even "moderate" inflation compounds significantly — at 3% annual inflation, prices double roughly every 24 years.

Sats as an inflation-resistant unit: Bitcoin has a hard cap of 21 million coins (2.1 quadrillion sats). No central authority can inflate the supply. While Bitcoin's price in fiat terms is volatile in the short term, its monetary policy is the most predictable of any currency in history. By tracking CPI alongside Bitcoin data, SatsAtlas helps you see the contrast between ever-inflating fiat currencies and Bitcoin's fixed supply.

Inflation Tracker

Explore CPI data across 50+ countries with interactive charts

Adoption Score Methodology

How we calculate Bitcoin adoption scores for each country