How Much Blood Volume Is a Child

Children: The average 80-pound child will have about 2,650 mL of blood in their body, or 0.7 gallons. Adults: The average adult weighing 150 to 180 pounds should have about 1.2 to 1.5 gallons of blood in their body. This is about 4,500 to 5,700 mL.

What is the blood volume for children?

Total blood volume A person’s total blood volume (TBV) is related to body weight. The TBV of a child is around 75–80 ml/kg and is higher in the neonatal period (from 85 ml/kg it rises to a peak of 105 ml/kg by the end of the first month and then drops progres- sively over ensuing months).

How much blood does a 3 year old have?

As a rough estimate, for pre-term babies, the amount of blood is about 90 ml per kilogram of body weight. For term newborns, it is about 80 ml per kg. For older babies, 1 to 12 months of age, estimate 75 ml per kg. For toddlers, up to age 3 estimate 70 ml per kg.