AU$100 in 1931 → AU$3,736 in 2009

Australia Inflation Calculator


Australian Inflation Rate, 1931-2009 (AU$100)

According to the Bureau of Statistics consumer price index, the dollar experienced an average inflation rate of 4.75% per year. Prices in 2009 are 3636.0% higher than prices in 1931.

In other words, AU$100 in the year 1931 is equivalent in purchasing power to AU$3,736 in 2009, a difference of AU$3,636.00 over 78 years.

The inflation rate in 2009 was 1.74%.

Inflation from 1931 to 2009
Cumulative price change 3636.00%
Average inflation rate 4.75%
Price difference (AU$100 base) AU$3,636.00
CPI in 1931 2.5
CPI in 2009 93.4

AUD inflation chart from 1922 to 2017

How to calculate the inflation rate for AU$100, 1931 to 2009

This inflation calculator uses the following inflation rate formula:

CPI in 2009 / CPI in 1931 * 1931 AUD value = 2009 AUD value

Then plug in historical CPI values. The Australian CPI was 2.5 in the year 1931 and 93.4 in 2009:

93.4 / 2.5 * AU$100 = AU$3,736

AU$100 in 1931 has the same "purchasing power" as AU$3,736 in 2009.

News headlines from 1931

Politics and news often influence economic performance. Here's what was happening at the time:

  • The Empire State Building opens in New York.
  • A railway explosion is faked by the Japanese in order to create a pretext for their Manchuria invasion.
  • Proclamation of the Chinese People's Republic by Mao Zedong.

Inflation Data Source

Raw data for these calculations comes from the government of Australia's annual (CPI) as provided by the Reserve Bank of Australia. The consumer price index was established in 1922 and is tracked by Australian Bureau of Statistics (ABS).

You may use the following MLA citation for this page: “1931 dollars in 2009 | Australia Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 23 May. 2018,

» Read more about inflation.