# Value of 1975 Australian Dollars today

\$100 in 1975

\$777.15 in 2019

The inflation rate in Australia between 1975 and today has been 677.15%, which translates into a total increase of \$677.15. This means that 100 dolars in 1975 are equivalent to 777.15 dolars in 2019. In other words, the purchasing power of \$100 in 1975 equals \$777.15 today. The average annual inflation rate has been 4.66%.

## Inflation timeline in Australia (1975-2019)

The following chart depicts the equivalence of \$100 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 (AUD) 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 (1975-2019) 676.19%
Total Inflation* 677.15%
Annual inflation avg. (1975-2019) 4.77%
Annual inflation avg.* 4.66%
CPI 1975 13.65
CPI 2019 105.97
CPI today* 106.1
\$1 in 1975 \$7.76 in 2019

* 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 \$100 worth today. There are 44 years between 1975 and 2019 and the average inflation rate has been 4.662%. Therefore, we can resolve the formula like this:

FV = PV (1 + i)n = \$100 * (1 + 0.05)44 = \$776.19

#### 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 1975 was 13.65 and the CPI today is 106.1. Therefore,

Final value = Initial value *
CPI final/CPI initial
= \$100 *
105.97/13.65
= \$776.19

### Australia inflation - Conversion table

Initial Value Equivalent value
\$1 dollar in 1975 \$7.77 dolars today
\$5 dolars in 1975 \$38.86 dolars today
\$10 dolars in 1975 \$77.72 dolars today
\$50 dolars in 1975 \$388.58 dolars today
\$100 dolars in 1975 \$777.15 dolars today
\$500 dolars in 1975 \$3,885.76 dolars today
\$1,000 dolars in 1975 \$7,771.52 dolars today
\$5,000 dolars in 1975 \$38,857.61 dolars today
\$10,000 dolars in 1975 \$77,715.21 dolars today
\$50,000 dolars in 1975 \$388,576.07 dolars today
\$100,000 dolars in 1975 \$777,152.14 dolars today
\$500,000 dolars in 1975 \$3,885,760.72 dolars today
\$1,000,000 dolars in 1975 \$7,771,521.44 dolars today

Period Value
1975 100
1976 114.29
1977 130.61
1978 142.86
1979 153.74
1980 169.39
1981 185.03
1982 205.44
1983 228.57
1984 248.3
1985 254.42
1986 275.51
1987 302.04
1988 323.81
1989 348.3
1990 375.51
1991 401.36
1992 407.48
1993 408.84
1994 416.33
1995 427.21
1996 448.98
1997 455.78
1998 454.42
1999 461.22
2000 470.07
2001 497.28
2002 512.93
2003 527.89
2004 540.82
2005 554.42
2006 570.07
2007 589.12
2008 606.12
2009 628.57
2010 641.5
2011 659.18
2012 678.91
2013 693.88
2014 712.93
2015 725.17
2016 737.42
2017 748.3
2018 762.59
2019 776.19
Today 777.15