Hi saheystar2 - the cup measurement is a standard size in US - the Australian is a different one. For an easy conversion for quantities goto:-
http://www.thefoody.com/glossary/convert.html is a simple conversion machine - type in quantities for results.
http://recipes.chef2chef.net/conversion is also an expanded one - includes can sizes for example. And
http://www.gourmetsleuth.com/conversions.htm is even further expanded.
Hope this helps - oh, and a lot of recipe books now carry conversion charts as well, so you should be able to get one to keep to hand if the pc isn't in the kitchen - or buy a calaulator designed for the conversions as an option too.....