How To Read A Gauge
Your propane gas gauge is located under the dome at the top of the tank. Reading your propane gas gauge is not complicated. You’ll see bold black numbers encircling the gauge and a single pointer needle. The pointer will indicate a number that represents a percentage.
Due to the physical properties of propane, your tank is considered full at 80% (allowing for the expansion of propane vapor). A propane tank is in IMMEDIATE NEED of refilling at 20%. For your safety and protection, it is best to fill your tank BEFORE the gauge goes below 20%.
This chart shows how many gallons of propane you have in your tank at a given percentage.
TIP: Your Gauge Reads The Number of Gallons Remaining
| 200 Lb | 420 Lb | 500 Gallon | 1000 Gallon | |
| 80% | 48 Gal | 99 Gal | 400 Gal | 800 Gal |
| 70% | 42 Gal | 87 Gal | 350 Gal | 700 Gal |
| 60% | 36 Gal | 74 Gal | 300 Gal | 600 Gal |
| 50% | 30 Gal | 62 Gal | 250 Gal | 500 Gal |
| 40% | 24 Gal | 50 Gal | 200 Gal | 400 Gal |
| 30% | 18 Gal | 37 Gal | 150 Gal | 300 Gal |
| If a Gauge Reads less than %30. | ||||
| 20% | 12 Gal | 25 Gal | 100 Gal | 200 Gal |
| 10% | 6 Gal | 12 Gal | 50 Gal | 100 Gal |
If your tank size is not listed in the chart on this page, use the following formula:
Tank Size X Percentage = Gallons
Example:
A 150 gallon tank with a 50% gauge reading:
150 X .50 = 75 gallons
