Q&A for How to Measure the Remaining Propane

Most canisters contain 20 pounds and weigh 17 pounds when completely empty. A full canister would contain 37 pounds.

If the "11kg" appears after "TW" (for tare weight), then you are correct. The tare weight is the weight of the tank when empty.

You cannot convert pounds to gallons unless you know the density of the liquid. Let's assume you have a pound's worth of a solution, and this solution weighs one fourth of a pound for every quart. Convert the pounds to quarts and convert the quarts to gallons.

First, find the name of the compressed gas you want to convert. If you know the quantity in pounds, multiply by the number in Column A 3. If you know the quantity in gallons, multiply by the number in Column B 4.

The age can be determined by the hydro date stamped on the tank collar. All gas cylinders are hydro tested at manufacture.

You shouldn’t try to weigh a 500-gallon propane tank on a bathroom scale because it’s far too large and unsafe. Instead, check the tank’s built-in gauge, which shows the fill level in percentage. You can estimate the remaining propane by multiplying 500 gallons by the gauge reading (for example, 40% = about 200 gallons left). You can also ask your propane supplier to check it during delivery, or use a remote monitoring system if your tank has one installed.

Propane tanks usually have several stamped numbers and markings, and each one has a specific meaning. Capacity (WC or water capacity) shows how much the tank can hold in pounds or gallons (e.g., WC 47.6 = about 20 lb propane tank). Tare weight (TW) shows the empty weight of the tank (used to calculate how much propane is inside). Propane capacity says how much can fit into the tank, and is sometimes shown directly as 20 lb, 30 lb, etc.

Yes—a 2-burner grill usually burns less propane than a 4-burner grill, but only if you’re using the same heat level and cooking time. Propane consumption depends on how many burners are on and how high they are set, not just the number of burners the grill has. A 4-burner grill can actually use the same or even less propane than a 2-burner grill if only two burners are turned on.

No, “grill time left” is not per burner in most propane grills. It usually refers to the estimated total remaining cooking time based on the propane tank level and current total gas usage.

You can determine your propane tank's size by checking the label or stamped markings on its body or collar. The capacity is typically indicated in pounds or gallons (e.g., 20 lb, 30 lb, 100 lb, or 30 gal).