Indonesia Inflation Calculator

Rp

Result:Rp100 in 2018 → Rp122.61 in 2026

The Indonesian Ruphia has lost 18% its value since 2018

Updated: March 11, 2026

Rp100 in 2018 is equivalent in purchasing power to about Rp122.61 today, an increase of Rp22.61 over 8 years. The ruphia had an average inflation rate of 2.58% per year between 2018 and today, producing a cumulative price increase of 22.61%.

This means that today's prices are 1.23 times as high as average prices since 2018, according to the OECD and the World Bank consumer price index for Indonesia. A ruphia today only buys 81.559% of what it could buy back then.

The inflation rate in 2018 was 3.20%. The current inflation rate compared to the end of last year is now 4.76%. If this number holds, Rp100 today will be equivalent in buying power to Rp104.76 next year.

⌃
Inflation from 2018 to 2026
Cumulative price change 22.61%
Average inflation rate 2.58%
Converted amount
Rp100 base		 Rp122.61
Price difference
Rp100 base		 Rp22.61
CPI in 2018 110.906
CPI in 2026 135.985
Inflation in 2018 3.20%
Inflation in 2026 4.76%
Rp100 in 2018 Rp122.61 in 2026
IDR inflation since 2018
Annual Rate, the OECD and the World Bank CPI
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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 Rp122.61 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

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When Rp100 is equivalent to Rp122.61 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 8 years.

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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:

Ruphia inflation: 2018-2026
YearRuphia ValueInflation Rate
2018Rp100.003.20%
2019Rp103.033.03%
2020Rp105.011.92%
2021Rp106.651.56%
2022Rp111.144.21%
2023Rp115.213.67%
2024Rp117.732.18%
2025Rp119.981.91%
2026Rp122.612.19%*
* Compared to previous annual rate. Not final. See inflation summary for latest 12-month trailing value.

This conversion table shows various other 2018 amounts in today's ruphias, based on the 22.61% change in prices:

Conversion: 2018 ruphias today
Initial valueEquivalent value
Rp1 ruphia in 2018 Rp1.23 ruphias today
Rp5 ruphias in 2018 Rp6.13 ruphias today
Rp10 ruphias in 2018 Rp12.26 ruphias today
Rp50 ruphias in 2018 Rp61.31 ruphias today
Rp100 ruphias in 2018 Rp122.61 ruphias today
Rp500 ruphias in 2018 Rp613.06 ruphias today
Rp1,000 ruphias in 2018 Rp1,226.13 ruphias today
Rp5,000 ruphias in 2018 Rp6,130.63 ruphias today
Rp10,000 ruphias in 2018 Rp12,261.26 ruphias today
Rp50,000 ruphias in 2018 Rp61,306.32 ruphias today
Rp100,000 ruphias in 2018 Rp122,612.64 ruphias today
Rp500,000 ruphias in 2018 Rp613,063.21 ruphias today
Rp1,000,000 ruphias in 2018 Rp1,226,126.43 ruphias today

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:

CPI todayCPI in 2018
×
2018 IDR value
=
Today's value

Then plug in historical CPI values. The Indonesian CPI was 110.9061 in the year 2018 and 135.9849 in 2026:

135.9849110.9061
×
Rp100
=
Rp122.61

Rp100 in 2018 has the same "purchasing power" or "buying power" as Rp122.61 in 2026.

To get the total inflation rate for the 8 years between 2018 and 2026, we use the following formula:

CPI in 2026 - CPI in 2018CPI in 2018
×
100
=
Cumulative inflation rate (8 years)

Plugging in the values to this equation, we get:

135.9849 - 110.9061110.9061
×
100
=
23%

Data source & citation

You may use the following MLA citation for this page: “Value of 2018 Indonesian Ruphias today | Indonesia Inflation Calculator.” Official Inflation Data, Alioth Finance, 3 Apr. 2026, https://www.officialdata.org/indonesia/inflation/2018.

Special thanks to QuickChart for their chart image API, which is used for chart downloads.

Ian Webster

About the author

Ian Webster is an engineer and data expert based in San Mateo, California. He has worked for Google, NASA, and consulted for governments around the world on data pipelines and data analysis. Disappointed by the lack of clear resources on the impacts of inflation on economic indicators, Ian believes this website serves as a valuable public tool. Ian earned his degree in Computer Science from Dartmouth College.

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» Read more about inflation and investment.

Inflation from 2018 to 2026
Cumulative price change 22.61%
Average inflation rate 2.58%
Converted amount
Rp100 base		 Rp122.61
Price difference
Rp100 base		 Rp22.61
CPI in 2018 110.906
CPI in 2026 135.985
Inflation in 2018 3.20%
Inflation in 2026 4.76%
Rp100 in 2018 Rp122.61 in 2026