An Adult Has About 5 Quarts Of Blood. When Donate A Pint To A Sick Friend, What Fraction Of Their Blood Do They Give Away?

One quart of blood is equal to 2 pints of blood. One pint of blood is equal to 473 ml. Average adult has 5 quarts or 10 pints or of the blood. If someone donate 1 pint of the blood then it is 10% of the total blood.