First you must now what size of bottle you have a grill bottle is a 20# bottle and will hold 20 pounds of propane. On the side of bottle will be a TW or tare weight usally around 18.5 this is the weight of the bottle empty 18.5 pounds. By weighing the bottle you can find out how full the bottle is. 18.5 tare weight + 20 pounds of propane=38.5 pounds(full bottle) what ever your bottle weighs over the tare weight is gas.
What is the pressure on a 30 pound propane tank
they put 75% in any propane tank, no more no less. 100 pounds of propane or about 23.5 gallons
2350lbs. on average
It's the sound of the lines filling with propane, not the propane tank.
It depends on the size of the tank to how much it will cost. For a standard 20 pound tank, it will likely cost around $40. If you recycle your old propane tank, you can get a discount and the new one will cost less.
The condensation line on the outside of a propane tank will show the level of fuel. The relative weight can also determine if it is time for a refill. A tank which is rusted or has valve damage should not be refilled.
About 30 pounds.