The average adult body contains between 5.2 and 6 liters, roughly 5.5 to 6.5 quarts, of blood. The heart pumps approximately the entire body blood volume completely each minute. According to the U. S. Department of Health, the average heart, based on our defaults, pumps about .073 liters of blood each beat or about 2000 US gallons per 24 hour day roughly. Select and insert your values for the beats per minute, beats per lifetime model and the blood volume per beat and click on Calculate. The data returned is anticipated number of beats per year and, the volume of blood pumped in a year in liters, gallons and 42 gallon barrels. That is also the case for months, weeks and days. The life expectancy in years is given, along with the volumes of blood anticipated for that lifetime. See our Life Expectancy Estimator by Heart Rate.