How To Tell If 1Lb Propane Tank Is Empty. If you know how much your tank weighs and how much propane (in weight) it can hold, you can figure out the propane level with a scale. The most precise way is to simply get a propane tank gauge.
3) the third method for telling if the home propane tank is empty uses water to estimate how to check the propane level. How much does a pound of propane weigh Those little 1lb propane bottles you use for your camping gear are managed differently than larger tanks.