All propane tanks have two weights stamped onto the collar. One represents the tank’s empty weight (Tare Weight). The other represents its full weight (Water Capacity). A full 5-gallon propane tank weighs about 37 pounds.
To figure out how full your propane tank is, weigh the tank on a bathroom scale and subtract the tare weight. For example, if a tank weighs 20.6 pounds and the tare weight stamped on the collar is 17 pounds, 20.6 – 17 = 3.6 pounds of propane. (20 pounds is considered maximum regulation full.) At a rough estimate, a pound of propane lasts about an hour. In the example, 3.6 pounds is 18% full (3.6 ÷ 20 = .18). Now that you know you have enough gas left to grill, it’s time to start up your BBQ!
Whether you’re looking for a cost-effective option for grilling or just want to compare options, here are the pros and cons of gas and charcoal grills.