How much blood does the heart pump per day?

The heart pumps the equivalent of 5,000 to 6,000 quarts of blood each day. Source: http://www.smm.org/heart/heart/top.html Most of those asking this question, and most sources of the answer, refer to the quantity in terms of gallons or liters. Using the same source listed above, here is a more useful and appropriate answer: An adult heart pumps about 6,000-7,500 liters (1,500-2,000 gallons) of blood daily. Source: http://www.smm.org/heart/lessons/lesson2.htm