There are between 10 to 12 pints of blood in a human body. Estimated total blood volume for an adult is approximately 60-65 ml/Kg body weight. Children have approximately 70 ml/kilogram body weight and obese patients approximately 55ml/kilogram body weight. The average human body has 5.6 liters of blood, which converts into 11.2 (average) pints of blood chil ...