How powerful was the Hiroshima atomic bomb compared with TNT?

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Atomic bombing of Hiroshima — atomic bombings of Hiroshima and Nagasaki A gigantic mushroom cloud rising above Hiroshima, Japan, on August 6, 1945, after a U.S. aircraft dropped an atomic bomb on the city, immediately killing more than 70,000 people.

The atomic bomb dropped on Hiroshima, known as Little Boy, had an explosive yield equivalent to 15,000 tons of trinitrotoluene (TNT).12

In the context of nuclear weaponry, the explosive power of atomic bombs is measured in kilotons, where one kiloton is equal to the explosive force of 1,000 tons of TNT. Therefore, the Hiroshima bomb is characterized as having a yield of 15 kilotons.342