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Propane FAQ's 7 How much can a propane tank hold
Propane FAQ's
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Propane tanks are most commonly referred to by their water capacity volume.
Propane tanks are normally filled to 80% of its water capacity.
For example, a 120 gallon tank will hold approximately 100 gallons of propane when completely full.
Since propane is a gas, it needs room to expand. This extra "room" that is in the tank allows the propane to expand. Depending on the ambient temperature outside, propane may expand more or less.

