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An adult will have about 5 liters (= 5 kilograms) of blood in his body. Assuming that an average adult male would weigh around 80 kilograms, that would make a percentage of 4,25%. About 70% of a human body consists of fluids, by the way; but most of that is water.

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9y ago
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13y ago

About 10% of the human body weight is blood. If you divide your body weight by 12, that will tell you the approximate # of pints of blood are in your body.

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Q: How many percent of blood in our body?
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