The atomic bombing of Hiroshima by the Numbers

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World’s first nuclear attack


On August 6, 1945, on the orders of President Harry Truman, Enola Gay dropped an atomic bomb (called “Little Boy”) on Hiroshima, killing about 140.000. August 9, a second atomic bomb (called “Fat Boy”) was dropped on Nagasaki.



The “Little Boy” had an estimated equivalent explosive force of 12.500 tons of TNT
The atomic bomb on Hiroshima instantly killed 140.000 people.
It is estimated that out of every 6 deaths in the bombings, 5 were civilians and 1 was military.
300.000: Total death toll to date (including those who have died from radiation-related cancers).
3.000 – 4.000: The estimated temperature in Celsius (5.400 – 7.200 Fahrenheit) at ground zero seconds after the detonation.
90% of Hiroshima was destroyed.

Only 3 out of the 12 people onboard the Enola Gay knew about the real mission.


“After the passage of nearly four decades and a concomitant growth in our understanding of the ever growing horror of nuclear war, we must shape the climate of opinion which will make it possible for our country to express profound sorrow over the atomic bombing in 1945. Without that sorrow, there is no possibility of finding a way to repudiate future use of nuclear weapons or of conventional weapons in such military actions as would not fulfill just-war criteria.”
U.S. Conference of Catholic Bishops, The Challenge of Peace: God’s Promise and Our Response, 1983, no. 302.




American Nuclear Bomb Power

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Editor in Chief Mehdi Chourou