Career
Training at Kingscliff, New South Wales, Calub, first gained international selection after winning the 100- and 200-metre backstroke at the 2000 Australian Championships. At the Olympics, she combined with Leisel Jones, Susie O"Neill and Petria Thomas to register a silver medal in the 4×100-metre medley relay, trailing the Americans home by 3 seconds. In her individual events, Calub came seventh in the 100-metre backstroke and was eliminated in the heats of the 200m backstroke.
This was repeated at the 2002 Pan Pacific Swimming Championships in Yokohama, where she combined with Jones, Thomas and Jodie Henry.
She retired at the end of 2002.