How much blood does the average adult have in his or her body?

1 Answer
May 24, 2017

7% of body weight.


So, typically 4.5 - 5.5 litres in an average human adult. Females carry less blood than males. We usually donate 1L or half litre of blood which is not succeeded by any damage to the body. But loss of blood more than that may result in serious health damage.