Your grill will tell you.

Yes, there are clear signs.

You’ll notice the flame getting weaker and more orange. The grill takes longer to reach temperature, especially on high. If you’re used to searing steaks and suddenly it’s just warming them, that’s the biggest giveaway.

The best trick is the hot water test. Pour warm tap water down the side of the tank and then feel with your hand. Where the metal feels cool, that’s where the liquid propane level is. The tank will be cool to the touch below the gas line, warm above. This works because propane absorbs heat as it evaporates, so the liquid section stays colder than the empty part.

Alternatively, check the tare weight on the tank collar (stamped “TW” and a number like 17 or 18). That’s the empty weight. Weigh your tank on a bathroom scale and subtract that number. A full 20 lb tank holds about 20 lbs of propane, so if you’re at 5 lbs or less of fuel, you’re