Australia is approximately 7,741,220 sq km, while Tanzania is approximately 947,300 sq km, making Tanzania 12.24% the size of Australia. Meanwhile, the population of Australia is ~25.5 million people (33.1 million more people live in Tanzania).
This to-scale map shows a size comparison of Australia compared to Tanzania. For more details, see an in-depth quality of life comparison of Tanzania vs. Australia using our country comparison tool.
