The ideal length of your vacation, in Australia depends on factors such as your travel goals, budget and desired destinations. Given that Australia’s a country with different regions it’s important to prioritize what you want to experience and explore before deciding how long to stay.
To truly appreciate the highlights of Australia, including Sydney, Melbourne, the Great Barrier Reef and Uluru it is advisable to spend around 2 3 weeks. This timeframe allows for visiting attractions immersing yourself in the culture and enjoying some leisure time.
If you have limited time you can focus on a region like the east coast and allocate 1 2 weeks for exploring cities and marveling at the natural wonders along the coastline.
Ultimately determining the duration of your stay, in Australia depends on your interests and financial resources. However I would recommend planning for a minimum of 10 14 days to get a sense of this country.