Chad is approximately 1,284,000 sq km, while Afghanistan is approximately 652,230 sq km, making Afghanistan 50.8% the size of Chad. Meanwhile, the population of Chad is ~16.9 million people (19.8 million more people live in Afghanistan).
This to-scale map shows a size comparison of Chad compared to Afghanistan. For more details, see an in-depth quality of life comparison of Afghanistan vs. Chad using our country comparison tool.
