Within Australia it is almost always abbreviated with the dollar sign ($), with A$ sometimes used to distinguish it from other dollar-denominated currencies. It is subdivided into 100 cents.

The Australian dollar is currently the fifth-most-traded currency in the world foreign exchange markets behind the US dollar, the euro, the yen and the pound sterling. The Australian dollar is popular with currency traders, because of the comparatively high interest rates in Australia, the relative freedom of the foreign exchange market from government intervention, the general stability of Australia's economy and political system, and the prevailing view that the Australian dollar offers diversification benefits in a portfolio containing the major world currencies, especially because of its greater exposure to Asian economies and the commodities cycle. Australians sometimes refer to the Australian dollar by the slang term "buck".

The Australian pound, introduced in 1910 and officially distinct in value from the pound sterling since devaluation in 1931, was replaced by the dollar on 14 February 1966. The rate of conversion for the new decimal currency was two dollars per Australian pound, or ten Australian shillings per dollar. The exchange rate was pegged to the pound sterling at a rate of 1 dollar = 8 shillings (2.50 dollars = 1 pound sterling.

With the breakdown of the Bretton Woods system in 1971, Australia converted the traditional peg to a fluctuating rate against the US dollar. In September 1974, Australia valued the dollar against a basket of currencies called the trade weighted index (TWI) in an effort to reduce the fluctuations associated with its tie to the US dollar. The daily TWI valuation was changed in November 1976 to a periodically adjusted valuation.

The dollar was eventually floated on 8 December 1983, allowing its value to fluctuate dependent on supply and demand on international money markets.

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