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What is the weight of human blood?

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The weight of whole blood at body temperature is 2.315 lbs/liter.

This number was calculated as follows:

Specific density of blood = 1.0506 that of water.
Water weighs 62.4 lbs/ft3.
So blood weighs 62.4 x 1.0506 = 65.56 lbs/ft3.
1 ft3 = 0.02832 m3
So multiplying 65.5 lbs/ft3 x 1 ft3/.02832 m3 = 2314.9 lbs/m3
1 liter = 10-3 m3
Therefore 1 liter of blood weighs 2.3149 lbs.
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