How many pints of blood are in a woman's body?

Dec 11, 2016

The average woman has nine to ten pints of blood in her body.

Explanation:

Per the American Red Cross, the average adult has 10 pints of blood, depending on weight.

Men average 10 to 11 pints and women nine to 10 pints.

There are many rules of thumb for estimating blood volume (BV).

The one that best agrees with the above estimate is that BV = 1 pt per 15.8 lb of weight.

Thus, a woman who weighs 150 lb would have a blood volume of

$\text{BV" = 150 color(red)(cancel(color(black)("lb"))) × "1 pt"/(15.8 color(red)(cancel(color(black)("lb")))) = "9.5 pt}$