I have seen and heard many figures of the deaths instantaneously, soon after and throughout many decades. In both Nagasaki and Hiroshima each had over 100,000 killed. See link below for some more solid figures.
The estimate of direct deaths from the bomb in Hiroshima was about 70,000 people. For Nagasaki, immediate death totals are less clear, but are estimated from 45,000 to 60,000.
The long-term deaths (severe injuries, radiation) are harder to calculate, with as few as 20,000 or as many as 96,000 additional casualties in Hiroshima. For Nagasaki, the delayed casualties could have been from 25,000 to 40,000 additional deaths. The increased cancer rate among survivors makes the actual death toll even higher.
A very rough estimate would be on the order of 100,000+ in Hiroshima and 60,000+ in Nagasaki.
Getting an accurate estimate of the total casualties has been greatly complicated by a number of factors:
For the purposes of this question you must also consider the uncertainties in what what fraction of the total casualties in the cities were civilian and what fraction were military. It should also be noted that in anticipation of a potential invasion of the Japanese main islands, the government of Japan had formed the Patriotic Citizens Fighting Corps allowing all men ages 16 to 60 and all women ages 17 to 40 to be called upon under the Volunteer Enlistment Law. Civilians were trained to use pretty much any available weapon including spears and other sharp instruments. Their instructions included directions that killing even a single Allied soldier would be satisfactory. Since Japan was unable to provide uniforms to civilians, (allowing civilians to be distinguished from soldiers), and that Japan was calling for all civilians to fight, all civilians would effectively become targets for the invading forces if the main Japanese Islands had been invaded; in a July 21, 1945 report, an intelligence officer for the U.S. Fifth Air Force stated:
The entire population of Japan is a proper military target...There are no civilians in Japan.
Japanese Public Law Number 30 was issued on March 27, 1945, officially drafting all members of the Patriotic Citizens Fighting Corps. This means most Japanese adults and teens were officially "military" 4 months before the bombs were dropped. In light of this, the distinction between civilian and military casualties becomes somewhat blurred.
The number of total casualties has been estimated at various times since the bombings with wide discrepancies. Here are some of the estimates from different sources:
Source 1: Hiroshima: 66,000 Nagasaki: 39,000
Source 2: 90,000-166,000 killed in Hiroshima 60,000-80,000 killed in Nagasaki
Source 3: Initial death count in Hiroshima (based solely on the disposal of bodies) set at 42,000-93,000. Surveys during the first months after the bombing yielded a more reliable estimate of 130,000 dead as of November 1945. A similar survey by officials in Nagasaki set its death toll at 60,000-70,000.
Source 4: 200,000 in Hiroshima 140,000 in Nagasaki.
less than 200,000. a bit over 90,000 at Hiroshima and a bit less at Nagasaki.
90,000-166,000 people in Hiroshima and 60,000-80,000 in Nagasaki.
Over 200,000 in both Nagasaki & Heroshima
The death toll reached 90,000-166,000 people in Hiroshima and 60,000-80,000 in Nagasaki.
580,000
50,000 Singaporeans died in WW2. All of them were civilians.
1747 usa killed 18400 japanese killed
About 1.7 million French died in WWI, including both civilians and soldiers.
Around 7 millions civilians lost their lives in World War 1. Most of these deaths were due to disease and malnutrition.
It is estimated 2 million Japanese warriors died in World War 2. They did not have exact records in those days.
7812 hampsters died.
2113 allied soldiers 1996 Japanese soldiers 4000 civilians
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around 3,000 us soildgers and 64 civilians
50,000 Singaporeans died in WW2. All of them were civilians.
1747 usa killed 18400 japanese killed
they were fare civilians but could been racist at and treated badly
400,000 Americans 8 million Germans 2 million Japanese
There was a combined 567,600 deaths from military and civilians.
Korea was a Japanese Colony during World War 2. There is o recorded Military deaths of any Korean Soldier but 450,000 Civilians were killed during World War 2.
5 million soldiers 7 million civilians
About 62 million people, or 2.5% of the worldpopulation