A 100 lb. tank holds 23.6 gallons and weighs 170 lbs. when full. Propane is only sold by weight if the person filling the tank weighs it BEFORE, DURING, and AFTER filling.

Likewise, how much do empty propane tanks weigh? All propane tanks come with a few numbers stamped on the handle -- most commonly the WC (water capacity) and TW (the weight of the tank when its empty). Most propane tanks for grilling weigh around 17 pounds (8 kilograms) when empty and hold roughly 20 pounds (9 kilograms) of propane.

Similarly, it is asked, what does 100 gallons of propane weigh?

Propane weighs 4.24 lbs per gallon. So a 100 lb propane tank holds 23.6 gallons.

What does 1 gallon of propane weigh?

1 gallon of propane weighs 4.2 pounds. A full 20 lb cylinder should have 4.7 gallons or propane in it.