How Many Litres of Blood are in the Human Body? Is it Different for Males and Females?

Answer: The quantity of blood present in the human body is dependent on various factors including age, gender and the location of their environment. An average adult has between 4.5 to 5.6 litres of blood in their body. 

Females tend to have a lower blood volume than men. The blood volume of a woman increases up to 50% during pregnancy. 

There are around 4.3 litres of blood in an average-sized female and 5.7 litres of blood in an average-sized male. The amount of blood in your body accounts for 7% of your body weight.