what is the weight of an empty propane tank for a grill
Weigh empty tank. Write number on tank with permanent marker. Fill tank and weigh it again. Write on tank with permanent marker. When you want to know how much gas is left in tank, weigh the tank and compare the numbers. Propane weighs 4.24 pounds per gallon. Each pound contains about 21,500 BTUs which translates to 91,500 BTUs per gallon. A standard '20 pound' tank will be filled to about 17 pounds or a little more.