Value of 1978 Indonesian Ruphias today

Rp100 in 1978

Rp3,731.3 in 2018

The inflation rate in Indonesia between 1978 and today has been 3,631.3%, which translates into a total increase of Rp3,631.3. This means that 100 ruphias in 1978 are equivalent to 3,731.3 ruphias in 2018. In other words, the purchasing power of Rp100 in 1978 equals Rp3,731.3 today. The average annual inflation rate has been 9.23%.

Inflation timeline in Indonesia (1978-2018)

The following chart ilustrates the equivalence of Rp100 throughout the years due to inflation and CPI changes. All values are equivalent in terms of purchashing 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:

Indicator Value
Total Inflation (1978-2018) 3,550.09%
Total Inflation* 3,631.3%
Annual inflation avg. (1978-2018) 9.41%
Annual inflation avg.* 9.23%
CPI 1978 2.99
CPI 2018 109.02
CPI today* 111.44
Rp1 in 1978 Rp36.5 in 2018

* Values extrapolated from the last official data to obtain today's values.

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 compound interest formula or the Consumer Price Index (CPI) formula.

Using the compound interest formula

Given that money changes in 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:

  • 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 40 years between 1978 and 2018 and the average inflation rate has been 9.229%. Therefore, we can resolve the formula like this:

FV = PV (1 + i)n = Rp100 * (1 + 0.09)40 = Rp3,650.09

Using the CPI formula

When the CPI for both start and end years is known, the following formula can be used:

Final value = Initial value *
CPI final/CPI initial

In this case, the CPI in 1978 was 2.99 and the CPI today is 111.44. Therefore,

Final value = Initial value *
CPI final/CPI initial
= Rp100 *
109.02/2.99
= Rp3,650.09

Indonesia inflation - Conversion table

Initial Value Equivalent value
Rp1 ruphia in 1978 Rp37.31 ruphias today
Rp5 ruphias in 1978 Rp186.57 ruphias today
Rp10 ruphias in 1978 Rp373.13 ruphias today
Rp50 ruphias in 1978 Rp1,865.65 ruphias today
Rp100 ruphias in 1978 Rp3,731.3 ruphias today
Rp500 ruphias in 1978 Rp18,656.5 ruphias today
Rp1,000 ruphias in 1978 Rp37,313.01 ruphias today
Rp5,000 ruphias in 1978 Rp186,565.03 ruphias today
Rp10,000 ruphias in 1978 Rp373,130.05 ruphias today
Rp50,000 ruphias in 1978 Rp1,865,650.26 ruphias today
Rp100,000 ruphias in 1978 Rp3,731,300.52 ruphias today
Rp500,000 ruphias in 1978 Rp18,656,502.62 ruphias today
Rp1,000,000 ruphias in 1978 Rp37,313,005.24 ruphias today

Value of Ruphia in time (by year)

Period Value
1978 100
1979 106.69
1980 128.66
1981 150.63
1982 161.72
1983 177.82
1984 199.16
1985 217.15
1986 226.78
1987 247.49
1988 270.5
1989 285.56
1990 302.93
1991 333.05
1992 366.32
1993 384.73
1994 423.85
1995 464.85
1996 506.49
1997 537.03
1998 592.47
1999 1,052.3
2000 1,072.59
2001 1,172.8
2002 1,319.87
2003 1,450.84
2004 1,525.73
2005 1,624.48
2006 1,901.88
2007 2,027.41
2008 2,160.88
2009 2,382.01
2010 2,448.33
2011 2,618.62
2012 2,717.78
2013 2,834.52
2014 3,053.42
2015 3,308.66
2016 3,419.6
2017 3,523.03
2018 3,650.09
Today 3,731.3