Rp

Value of 1978 Indonesian Ruphias today

Rp100 in 1978
Rp4,017.05 in 2022

The inflation rate in Indonesia between 1978 and today has been 3,917.05%, which translates into a total increase of Rp3,917.05. This means that 100 ruphias in 1978 are equivalent to 4,017.05 ruphias in 2022. In other words, the purchasing power of Rp100 in 1978 equals Rp4,017.05 today. The average annual inflation rate between these periods has been 8.76%.

Inflation timeline in Indonesia (1978 - 2022)

The following chart depicts the equivalence of Rp100 due to compound 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 extrapolated from the latest 12-month rolling average official data.

The following table contains relevant indicators:

Indicator Value
Cumulative inflation 1978-2021 3,765.2%
Cumulative inflation 1978-today 3,917.05%
Avg. Annual inflation 1978-2021 8.87%
CPI 1978 3.06
CPI 2021 118.28
CPI 2022-05 (latest official data) 122.58
CPI today 122.93

How to calculate today's value of money after inflation?

There are several ways to calculate the time value of money. Depending on the data available, results can be obtained by using the Consumer Price Index (CPI) formula or the compound interest formula.

Using the CPI formula

When we have both the start and end years, we can use the following formula:

Valuet =Value0 ×
CPIt/CPI0

To obtain the values equivalent in buying power between 1978 and 2021, use the corresponding CPI values:

Value2021
=Value1978 ×
CPI2021/CPI1978
=Rp 100 ×
118.28/3.06
Rp3,865.2

To obtain the equivalent value today (present value), plug in the CPI for today, which is estimated as 122.93:

Valuetoday
=Value1978 ×
CPItoday/CPI1978
=Rp 100 ×
122.93/3.06
Rp4,017.05

Alternative: Using the compound interest formula

Given that money changes with time as a result of an inflation rate that acts as compound interest, we can use the following formula: FV = PV × (1 + i)n, where:

  • FV: Future Value
  • PV: Present Value
  • i: Interest rate (inflation)
  • n: Number of times the interest is compounded (i.e. # of years)

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 was 8.8707%. Therefore, we can resolve the formula like this:

Value2021
=PV × (1 + i)n
=Rp100 × (1 + 0.088707)43
Rp3,865.2

Indonesia inflation - Conversion table

Initial Value Equivalent value
Rp1 ruphia in 1978 Rp38.65 ruphias in 2021
Rp5 ruphias in 1978 Rp193.26 ruphias in 2021
Rp10 ruphias in 1978 Rp386.52 ruphias in 2021
Rp50 ruphias in 1978 Rp1,932.6 ruphias in 2021
Rp100 ruphias in 1978 Rp3,865.2 ruphias in 2021
Rp500 ruphias in 1978 Rp19,325.99 ruphias in 2021
Rp1,000 ruphias in 1978 Rp38,651.98 ruphias in 2021
Rp5,000 ruphias in 1978 Rp193,259.91 ruphias in 2021
Rp10,000 ruphias in 1978 Rp386,519.82 ruphias in 2021
Rp50,000 ruphias in 1978 Rp1,932,599.09 ruphias in 2021
Rp100,000 ruphias in 1978 Rp3,865,198.18 ruphias in 2021
Rp500,000 ruphias in 1978 Rp19,325,990.89 ruphias in 2021
Rp1,000,000 ruphias in 1978 Rp38,651,981.78 ruphias in 2021
Cumulative inflation From 1978 3,917.05%
Avg. annual inflation From 1978 8.76%
CPI 1978 3.06
CPI today 122.93

Value of Ruphia over time (by year)

Period Value
1978 100
1979 116.23
1980 137.2
1981 154.02
1982 168.57
1983 188.46
1984 208.17
1985 218
1986 230.7
1987 252.1
1988 272.38
1989 289.86
1990 312.52
1991 341.96
1992 367.69
1993 403.25
1994 437.66
1995 478.88
1996 517.07
1997 549.26
1998 870.31
1999 1,048.53
2000 1,087.2
2001 1,212.23
2002 1,356.49
2003 1,448.15
2004 1,535.97
2005 1,696.53
2006 1,918.92
2007 2,041.86
2008 2,250.67
2009 2,349.4
2010 2,470.02
2011 2,602.31
2012 2,713.68
2013 2,887.7
2014 3,072.36
2015 3,267.86
2016 3,383.08
2017 3,511.93
2018 3,624.26
2019 3,734.09
2020 3,805.82
2021 3,865.2
2022-05 4,005.74
Today 4,017.05

All available years

Today's value of indonesian ruphias by year:

1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 |

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