Rp100 in 1978
The inflation rate in Indonesia between 1978 and today has been 3,832.01%, which translates into a total increase of Rp3,832.01. This means that 100 ruphias in 1978 are equivalent to 3,932.01 ruphias in 2021. In other words, the purchasing power of Rp100 in 1978 equals Rp3,932.01 today. The average annual inflation rate has been 8.7%.
The following chart depicts the equivalence of Rp100 throughout the years due to inflation and CPI changes. All values are equivalent in terms of purchasing power, which means that for each year the same goods or services could be bought with the indicated amount of money.
All calculations are performed in the local currency (IDR) and using 6 decimal digits. Results show only up to 2 decimal digits to favour readability. Inflation data is provided by governments and international institutions on a monthly basis. Today's values were obtained by estimating figures from recent trends.
The following table contains relevant indicators:
|Total Inflation (1978-2021)||3,828.03%|
|Annual inflation avg. (1978-2021)||8.91%|
|Annual inflation avg.*||8.7%|
|Rp1 in 1978||Rp39.28 in 2021|
* Values extrapolated from the last official data to obtain today's values.
There are several ways to calculate the time value of money. Depending on the data available, results can be obtained by using the compound interest formula or the Consumer Price Index (CPI) formula.
Given that money changes with time as a result of an inflation rate that acts as a compound interest, the following formula can be used: FV = PV (1 + i)n, where:
In this case, the future value represents the final amount obtained after applying the inflation rate to our initial value. In other words, it indicates how much are Rp100 worth today. There are 43 years between 1978 and 2021 and the average inflation rate has been 8.7029%. Therefore, we can resolve the formula like this:
FV = PV (1 + i)n = Rp100 * (1 + 0.09)43 = Rp3,928.03
When the CPI for both start and end years is known, the following formula can be used:
In this case, the CPI in 1978 was 2.99 and the CPI today is 117.44. Therefore,
|Initial Value||Equivalent value|
|Rp1 ruphia in 1978||Rp39.32 ruphias today|
|Rp5 ruphias in 1978||Rp196.6 ruphias today|
|Rp10 ruphias in 1978||Rp393.2 ruphias today|
|Rp50 ruphias in 1978||Rp1,966.01 ruphias today|
|Rp100 ruphias in 1978||Rp3,932.01 ruphias today|
|Rp500 ruphias in 1978||Rp19,660.06 ruphias today|
|Rp1,000 ruphias in 1978||Rp39,320.12 ruphias today|
|Rp5,000 ruphias in 1978||Rp196,600.61 ruphias today|
|Rp10,000 ruphias in 1978||Rp393,201.22 ruphias today|
|Rp50,000 ruphias in 1978||Rp1,966,006.09 ruphias today|
|Rp100,000 ruphias in 1978||Rp3,932,012.17 ruphias today|
|Rp500,000 ruphias in 1978||Rp19,660,060.86 ruphias today|
|Rp1,000,000 ruphias in 1978||Rp39,320,121.72 ruphias today|
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