Indonesia Inflation Calculator

Buying power of Rp100 in 2018

This chart shows a calculation of buying power equivalence for Rp100 in 2018 (price index tracking began in 1959).

For example, if you started with Rp100, you would need to end with Rp118.18 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When Rp100 is equivalent to Rp118.18 over time, that means that the "real value" of a single Indonesian ruphia decreases over time. In other words, a ruphia will pay for fewer items at the store.

This effect explains how inflation erodes the value of a ruphia over time. By calculating the value in 2018 dollars, the chart below shows how Rp100 is worth less over 6 years.

According to the OECD and the World Bank, each of these IDR amounts below is equal in terms of what it could buy at the time:

This conversion table shows various other 2018 amounts in today's ruphias, based on the 18.18% change in prices:

How to calculate inflation rate for Rp100 since 2018

Our calculations use the following inflation rate formula to calculate the change in value between 2018 and today:

Then plug in historical CPI values. The Indonesian CPI was 110.9061 in the year 2018 and 131.07432316671134 in 2024:

Rp100 in 2018 has the same "purchasing power" or "buying power" as Rp118.18 in 2024.

To get the total inflation rate for the 6 years between 2018 and 2024, we use the following formula:

Plugging in the values to this equation, we get:

Data source & citation

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