Just how much blood do we have pumping through our heart, lungs, organs, veins, and arteries? Well, the blood volume will vary depending on the size of the person, their state of hydration, and the volume of the cellular elements (white blood cells and red blood cells predominantly) in their blood. The total blood volume for an average 70 kg human (150 pounds) is approximately 5.5 liters (or a little more than 5 1/2 quarts, or a little more than 160 ounces)!
Medical Author: William C. Shiel, Jr., MD, FACP, FACR
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Last Editorial Review: 10/1/2002