Cost of living in Brisbane (Australia) is 11% more expensive than in Al Mubarraz (Saudi Arabia)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 1,393 prices entered by 255 different people.
For example, you would need at least ﷼ 14,436 (AU$5,047) in Brisbane to maintain the same standard of living that you can have with ﷼ 13,000 in Al Mubarraz.