How Many Gallons of Propane in a 20 lb Tank

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How many gallons of propane to expect in a standard 20 lb tank (typical barbecue grill size) when it’s “full” – is a bit confusing. However I’m going to make it simple for you (as simple as I can). When you bring your empty 20 lb propane tank to get it refilled, you are most likely going to get 4 gallons of propane. The tank technically won’t be filled to capacity, but for safety reasons a 20 lb propane tank should only fill to 80% of it’s maximum. If you were somehow able to fill the tank completely (extremely unsafe)

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