Which desert is the largest hot desert in the world?

The Sahara Desert is recognized as the largest hot desert in the world, covering an area of approximately 9.2 million square kilometers (about 3.6 million square miles). It spans across several countries in North Africa and has distinct climatic and ecological features typical of hot deserts, such as extreme temperatures and low rainfall. The designation as the "largest hot desert" stems from both its size and its classification; it is characterized by high temperatures during the day, especially in the summer months.

In comparison to other deserts listed, the Gobi Desert is classified as a cold desert and is significantly smaller in area than the Sahara. The Arabian Desert, while also large, does not surpass the Sahara in terms of size. The Kalahari Desert is another notable desert in terms of biodiversity and ecosystem but is smaller than the Sahara as well. The distinction of the Sahara as the largest hot desert is firmly established in geographical terminology and data.