Propane tank sizes & gallons left
Propane tanks are filled to only about 80% of their water capacity, leaving room for the gas to expand. The gauge reads percent of total capacity.
| Tank (water capacity) | Max fill at 80% |
|---|---|
| 120 gal | 96 gal |
| 250 gal | 200 gal |
| 500 gal | 400 gal |
| 1,000 gal | 800 gal |
Source: Tennessee Propane Gas Association: reading your tank and the 80/20 rule. Many suppliers suggest calling for a fill before the gauge drops to about 20–30%; check what your supplier recommends. This calculator doesn't estimate usage, because that depends on your home.
AFFILIATE SLOT: tank gauge monitors (no IDs yet)
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