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The displacement in gallons would be about equal to the weight of the individual since the density of a average body is about equal to the density of water. Larger bodies float and smaller bodies sink due to fat being less dense than water and muscle. Given that an average body weighs 155 lbs, we divide by 8.34 lbs/gal to get about 18.5 gallons water. You could also use 8.55 lbs/gal for saltwater.

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15y ago
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13y ago

Do the math. The aveage total area of a human body is 17,500 square cm.

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Q: What is the displacement in gallons of water for an adult human fully submerged?
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