A 250-gallon propane tank lasts for anywhere between 26 days to 7 months and 2 days. That’s quite a wide range. The longevity of a 250-gallon propane tank depends on use (how much propane per day you burn). This is indirectly connected with how big a house you want to heat with a 250-gallon propane tank. If you want to use a residential ...How much does a full propane tank weigh? They can weigh as much as 5,000lbs full! This page publishes complete charts for propane tank empty and full weights for 1 to 100 pound tanks and 5 to 1,000 gallon tanks.There are 226.77 centimoles in 100 grams of Propane. About Propane. 493 kilograms [kg] of Propane fit into 1 cubic meter. 30.77698 pounds [lbs] of Propane fit into 1 cubic foot. Propane weighs 0.493 gram per cubic centimeter or 493 kilogram per cubic meter, i.e. density of propane is equal to 493 kg/m³; at 25°C (77°F or 298.15K) at standard ...Answer: A standard 20 pound propane tank when safely full (80% full) , weighs the stamped “TW” (Tare Weight) plus 16.8 (the weight of 4 gallons of propane.. 4 …How much does a 250 gallon propane tank weigh? Depends on the manufacturer and specification standard of the tank, but roughly speaking at this capacity, there is about 2 pounds of steel for each ...In terms of quantity, a 10 lb propane tank holds about 2.5 gallons of fuel. In litres, that is around 11.3 L. The most commonly found propane tank size is the 20 lb option, which carries double the fuel of a 10 lb tank but is significantly less portable. A 10 lb tank is certainly larger than a 5 lb or a 1 lb tank, but it is still small enough ...40 lb. Propane Tank · Empty shipping weight: 29.1 lbs. · Fill weight: 40 lbs. · Holds: 9.4 gallons of propane ...Mar 24, 2023 · A 20-pound propane tank weighs about 10 pounds empty. A 30-pound propane tank weighs about 14 pounds empty, and so on. A full propane tank weighs roughly half its weight when it’s empty–the exact amount depends on the size of your particular tank. For example, if you have a 20lb tank then it will weigh 10lbs whether it’s full or empty ... Most 500-gallon propane tanks extend up to 120 inches or 305 centimeters long with a diameter of 37 inches or around 94 centimeters. This storage canister can hold up to 400 gallons of fuel. When empty, it can weigh 949 pounds, and when full, this tank weighs a whopping 2649 pounds. 500 Gallon Tank Uses.How Much Does a 250 Gallon Propane Tank Weigh. The weight of a 250 gallon propane tank can vary depending on the specific tank and its manufacturer. However, on average, an empty tank weighs around 500-600 pounds, and when filled with propane, it can weigh around 1700 pounds. It’s important to keep in mind that a filled tank is …All 500-gallon propane tanks are 119 inches long (or 9 feet and 11 inches). Total Empty Weight: 949 lbs. 500-gallon propane tanks are quite heavy. They weigh 949 lbs when empty. When you fill them with 400 gallons of propane (further on, we explain why you can only put 400 gallons of propane in a 500-gallon propane tank; it’s the 80% rule for ...Nov 8, 2023 · That will bring you to a total of 4.3 pounds. The average 40-pound propane tank can hold about 9 to 10 gallons. But since you can only fill the tank with 8 gallons of propane, 80% of capacity, you are looking at increasing the total weight to 66 pounds approx. Other tanks may be heavier than that total. The total weight of the propane comes to ... An empty 30-lb propane tank weighs about 25 lbs. And the propane itself weighs about 24 lbs when the tank is filled to 80% capacity. So the combined weight of the empty tank plus the propane filled to 80% capacity is about 49 lbs. Depending on the type of 30-lb tank, that number may fluctuate a little.For example, a 500-gallon tank will carry 300 gallons to 325 gallons of propane for an optimal delivery. A 1,000-gallon tank will carry 600 gallons to 700 gallons. They can only fill a propane tank up to about 85% capacity because gas expands in the tank as it warms up. Another consideration is geography.That’s because it’s 15, or 20 or 40 pounds of propane plus the weight of the tank, also called the tare weight. For a 20-pound cylinder, the tare weight is typically about 17 pounds. So a full 20-pound cylinder will weigh about 37 pounds. You’ll find the tare weight on the neck of the cylinder, sometimes as “TW.”.An empty 30-lb propane tank weighs about 25 lbs. And the propane itself weighs about 24 lbs when the tank is filled to 80% capacity. So the combined weight of the empty tank plus the propane filled to 80% capacity is about 49 lbs. Depending on the type of 30-lb tank, that number may fluctuate a little.Most 500-gallon propane tanks extend up to 120 inches or 305 centimeters long with a diameter of 37 inches or around 94 centimeters. This storage canister can hold up to 400 gallons of fuel. When empty, it can weigh 949 pounds, and when full, this tank weighs a whopping 2649 pounds. 500 Gallon Tank Uses. For example, a 250-gallon propane tank weighs about 483 lbs when empty and 1,333 lbs when full. As you can read in a more detailed version, 1 gallon of propane weighs 4.11 lbs at 77°K. The best practice is to install it empty (that’s will almost 500 pounds of weight), and then fill it up. About Propane, gas. 1.87939 kilograms [kg] of Propane, gas fit into 1 cubic meter. 0.00108636 ounce [oz] of Propane, gas fits into 1 cubic inch. Propane, gas weighs 0.00187939 gram per cubic centimeter or 1.87939 kilogram per cubic meter, i.e. density of propane, gas is equal to 1.87939 kg/m³; at 0°C (32°F or 273.15K) at standard …Nov 8, 2023 · That will bring you to a total of 4.3 pounds. The average 40-pound propane tank can hold about 9 to 10 gallons. But since you can only fill the tank with 8 gallons of propane, 80% of capacity, you are looking at increasing the total weight to 66 pounds approx. Other tanks may be heavier than that total. The total weight of the propane comes to ... Namely, 1 gallon of water weighs 8.34 pounds at 77°F. The density of propane is about 50% lower than that of water. This means that 1 gallon of propane doesn’t weigh 8.34 lb per gallon. How much does a gallon of propane weight? Anywhere from 4.05 lb/gallon (at 90°F) to 4.20 lb/gallon (at 60°F).That number should be stamped on the tank’s collar. It may be written at T.W. Secondly, you should know the capacity of the propane tank in gallons. Thirdly, you need to know that one gallon of propane weighs 4.2 pounds. Multiply the number of gallons the tank can hold by 4.2. That will tell you the weight of the propane when the tank is full.How Much Does It Weigh? We know that this 30 lb. propane tank is going to weigh at least 30 pounds. The 30 lb. number is specifically related to the assumed weight of 7 gallons of propane within the tank. However, that number does not consider the tank materials’ weight. Most 30 lb. propane tanks will weigh more like 50 pounds when they …According to the US Energy Information Administration, the average price for residential propane was 2.436 dollars per gallon as of December 2018. There is some variation in local ...Sep 1, 2017 ... For the 5 gallon tanks - 17 lbs empty, 37 lbs full.. approximately. Not sure about the larger tanks, but google knows ...Mar 12, 2022 · Larger propane tanks above the ASME are underground tanks. The underground tanks include the 500-gallon propane tank and the 1,000-gallon propane tank. In order to understand things properly, we must know that 1 liter of propane weighs 0.51 kilograms. Meanwhile, 1 gallon of propane weighs 4.11 pounds (2.21 kilograms). How much does a gallon of propane weigh in pounds (lb)? Propane density depends on temperature: at 90°F, a gallon of propane weighs 4.05 lb, and at 60°F a gallon of propane weighs 4.20 lb. You can consult how much propane weighs here . How Much Does A Gallon Of Propane Weigh? 1 gallon of propane weighs 4.11 lb. That’s if you measure it at 77°F, of course. It’s important to understand that the 4.11 lb/gallon density of LPG only applies at room temperature (77°F).Mar 24, 2023 · A 20-pound propane tank weighs about 10 pounds empty. A 30-pound propane tank weighs about 14 pounds empty, and so on. A full propane tank weighs roughly half its weight when it’s empty–the exact amount depends on the size of your particular tank. For example, if you have a 20lb tank then it will weigh 10lbs whether it’s full or empty ... The average weight is 552 pounds. Take the tare weight of the empty tank and multiply it by the weight of propane. The weight of a gallon of propane is 4.25 pounds. In a 100-gallon tank, you may fill 80 gallons of propane, which is an additional 804.25 = 340 pounds. The weight of a full 100 gallon tank is 212 lb + 340 lb = 552 lb. The total empty weight of the horizontal tank is not standardized; an empty 120-gallon horizontal propane tank can weigh anywhere from 260 lbs to 300 lbs. Full Weight: 655 – 695 lbs. As we have mentioned above, we have to add 395 lbs of propane (that’s a weight of 96 gallons of propane) to the empty weight to get the 120-gallon horizontal ... A 100-pound propane tank holds 23.6 gallons of propane. A propane tank is considered full at 80 percent capacity and should be refilled as soon as possible if it drops to 30 percen...To know how much gas is left in gallons, divide the weight of the remaining gas by 4.2 pounds, which is the weight of one gallon of propane. Using this formula and the example above, we know that 8 lbs of gas is equivalent to 1.9 gallons (8 lbs or 3.6 kg of remaining gas / 4.2 lbs or 1.9 kg per gallon = 1.9 gallons or 8.6 liters). ...The weight of propane in pounds can be determined by multiplying the number of gallons by 4.2. For example, a 20-gallon propane tank would hold approximately 84 pounds of propane (20 gallons * 4.2 lbs/gallon = 84 lbs).How Much Do Atoms Weigh? - Atoms are in everything and are the particles of the universe. Visit HowStuffWorks to discover what an atom is and how much they weigh. Advertisement The...1. Engraved on the side of the tank should be the letters TW then a number. This number is the empty tank weight. For example, the typical 5 gallon (18.9 L) propane tank might say TW 17.2. The weight of the empty tank in the example is 17.2 lbs. 2. Weigh the tank on a bathroom scale to find the total current weight.120 Gallon Propane Tank. Dimensions: 4'6" in height and 30" in diameter. Uses: 1-2 residential appliances. Commonly used for a hot water heater or space heater alone, or with another small appliance like a dryer or cooktop. A 120 gallon propane tank is also commonly referred to as 420 lb propane tank. 120 gallon propane tanks hold 96 gallons of ...The dimensions of a 20-pound propane tank are 8 inches length and 4-inches wide. According to the 80 percent safety guideline, a 20 lb propane tank can hold a total of 16 lb of propane. The empty 20-pound propane tank weighs around 13.5 pounds. Aluminum 20 pound propane cylinders are lighter than steel cylinders.mass = d × v × vcfmcf, where vcf is the conversion factor to convert from US gallon to cubic meters (table near the end of this page) and mcf equals 1 because the mass is already in kiliograms. So, plugging these values in the formula above, we get: mass = 583.07 × 1 × 0.0037854117841. mass = 583.07 × 0.003785411784, or.The cost to install a propane tank for a house ranges from $700 to $4,500 installed, but on average, expect to pay about $1,500 to install a 500-gallon above-ground propane tank and $2,000 for a 500-gallon underground tank. Prices depend on the size of the house, how much of the home is gas-powered, and the climate, if heating is included.It can be a bit confusing that propane tanks are typically labeled by weight, not gallons. As a result, a 100 lb propane tank does not carry 100 gallons of propane. You have to do some math in order to figure out how many gallons any propane tank carries. To put it simply, on average you have 0.236 gallons = 1 pound of propane.The dimensions of a 20-pound propane tank are 8 inches length and 4-inches wide. According to the 80 percent safety guideline, a 20 lb propane tank can hold a total of 16 lb of propane. The empty 20-pound propane tank weighs around 13.5 pounds. Aluminum 20 pound propane cylinders are lighter than steel cylinders.Aug 6, 2022 ... Thus, a filled propane gallon will weigh around 115 pounds. The amount of BTU in a 60-pound propane tank? A gallon of propane contains about ...1-gallon propane bottles: Ideal for people who want to do a little cooking while camping. 5- to 50-gallon tanks: Ideal for running an outdoor grill or providing fuel for the cost of a backup generator. 120- to 325-gallon tanks: Can take care of heating, cooking, and using a fireplace, dryer, and standard hot waterThe 60lb propane tank can hold up to around 13.4 gallons of propane. This is usually 80% of the total capacity to allow the propane to expand. Weight of a 60-pound propane tank. An empty 60-pound propane tank will definitely weigh 60lb. A 60lb of propane tank can contain about 13.4 gallons. Note that 1 gallon of propane is 4.11b.A 250 pound propane tank can hold 59 gallons of propane. 59 gallons of propane is well above the average size tank, making 250 pound propane tanks large. ... Whenever you calculate how much a full propane tank weighs, you have to add the weight of the propane to the weight of the tank itself. Obviously, a 250 pound propane tank holds …A full 250-gallon propane tank contains approximately 80% of its total capacity in liquid propane, which equates to 200 gallons of propane. Considering that propane weighs 4.24 pounds per gallon at room temperature, a full 250-gallon propane tank can weigh around 1,348 to 1,648 pounds (including the tank’s tare weight).The weight of a gallon of propane is 4.25 pounds. In a 100-gallon tank, you may fill 80 gallons of propane, which is an additional 804.25 = 340 pounds. The weight of a full 100 gallon tank is 212 lb + 340 lb = 552 lb. A 100 gallon propane tank contains 7,320,000 BTU. We could use this tank to provide 10,000 BTU/h of heating output for roughly a ...What is the weight of a full 500 gallon propane tank? When fully loaded, a 500 gallon propane tank should weigh around 2,876 pounds (1,305 kg). This figure covers the tank’s weight as well as the propane within. A 500 gallon propane tank weighs around 1,180 pounds when empty (535 kg). The weight of liquid propane per gallon is 4.24 pounds …1-gallon propane bottles: Ideal for people who want to do a little cooking while camping. 5- to 50-gallon tanks: Ideal for running an outdoor grill or providing fuel for the cost of a backup generator. 120- to 325-gallon tanks: Can take care of heating, cooking, and using a fireplace, dryer, and standard hot waterThe 60lb propane tank can hold up to around 13.4 gallons of propane. This is usually 80% of the total capacity to allow the propane to expand. Weight of a 60-pound propane tank. An empty 60-pound propane tank will definitely weigh 60lb. A 60lb of propane tank can contain about 13.4 gallons. Note that 1 gallon of propane is 4.11b.How much propane is in a 250-gallon tank? Most 250-gallon tanks hold around 200 gallons of propane. This is because the tank is only 80% full to allow for the expansion of the liquid propane. One gallon of propane gas contains approximately 91,600 BTUs of energy, so a 250-gallon tank would hold approximately 96,000-100,000 BTUs of …How Much Does A Gallon Of Propane Weigh? 1 gallon of propane weighs 4.11 lb. That’s if you measure it at 77°F, of course. It’s important to understand that the 4.11 lb/gallon density of LPG only applies at room temperature (77°F).Feb 3, 2023 · To know how much gas is left in gallons, divide the weight of the remaining gas by 4.2 pounds, which is the weight of one gallon of propane. Using this formula and the example above, we know that 8 lbs of gas is equivalent to 1.9 gallons (8 lbs or 3.6 kg of remaining gas / 4.2 lbs or 1.9 kg per gallon = 1.9 gallons or 8.6 liters). How Much Does a Full Propane Cylinder Weigh? For the most part, grills utilize a 20-pound portable propane cylinder, also called a 5-gallon tank. This is the propane tank size you commonly find at home stores, gas stations, and hardware stores. A 20-pound cylinder is compatible with pretty much all propane refill stations.Taking this into account, a 100-pound propane tank would actually be filled with approximately 80 pounds of propane, which translates to about 18.9 gallons (80 pounds / 4.24 pounds per gallon). When considering the weight of the tank itself, which is roughly 70 pounds, the total weight of a filled propane tank of this size would be around 150 ...You should get about 20 lbs in a tank which makes the tank 80% full or about 4 gallons. The mix of propane/butane can vary which slightly affects the weight of ...To give you a general idea, a gallon of propane typically weighs around 4.2 pounds in liquid form at 60°F (16°C) and 5 gallons of propane weighs around 21.2 pounds. Keep in mind that this figure may change slightly under different conditions.A gallon of propane weighs between 4.24 pounds and 6.09 pounds, depending on its temperature. The exact weight will vary based on the specific type of propane you’re using, but generally speaking, you can expect your gallon to weigh approximately 4.2 pounds when it’s at room temperature (70 degrees F).40 lb. Propane Tank · Empty shipping weight: 29.1 lbs. · Fill weight: 40 lbs. · Holds: 9.4 gallons of propane ... 1 gallon of propane weighs 4.2 pounds. A “full” 20 lb cylinder (a full propane tank) should have 4.7 gallon of propane in it. These “20 lb” tanks with corresponding water capacity are designed to take up to 20 pounds of propane. Riley Beard Propane Tank, 30,000 Gallon, was used. At 100 degrees F, the pressure is 250 psi. On saddles made of concrete. 48,000 pound weight. pound propane tanks. Size and Capacity: When filled, this tank is about 1.5 feet tall by 1 foot in diameter and holds a little less than 5 gallons of propane. Note: These tanks are not refilled on the spot.Tanks are generally not filled beyond 80%, so maximum fill would be 672 pounds. Thus, full tank should be approximately 1000 pounds +/-. a 250 gal tank weighs approx. 485lbs and a 500 gal tank weighs approx. 950 lbs so a 350 gal should weigh approx. 625 lbs. one gal of propane = 4.26 lbs.Where can you weigh yourself for free? We list 10 places with scales (so you can find an option nearby), plus what to know before you visit. There are many reasons why you might ne...1. Engraved on the side of the tank should be the letters TW then a number. This number is the empty tank weight. For example, the typical 5 gallon (18.9 L) …Propane weighs 4.24 lbs per gallon so 100 lb capacity would hold 23.6 gallons. The full weight of a 100 lb propane tank is 165 pounds. When empty 100lb propane tank weighs 67 pounds and has a …The weight of a gallon of oil varies depending on the specific gravity (density). Most commonly, the weight of a gallon of oil refers to crude oil, a vital resource in the global energy industry. Crude oil can range from 7.2 pounds to 7.29 pounds per gallon. However, a gallon of heavy crude oil can weigh even more, sometimes up to 8.4 pounds.If you’re in the market for a propane tank, you may be considering a 500-gallon option. A 500-gallon propane tank is a popular choice for homeowners who rely on propane for heating...According to the US Energy Information Administration, the average price for residential propane was 2.436 dollars per gallon as of December 2018. There is some variation in local ...Propane has a gravity of around 0.51, which means that 1 gallon of propane weighs approximately 4.24 pounds. 1 gallon of propane equals 4.2 pounds. The tank is at 80% capacity. The Actual Propane Content in the tank should be only 80% – 90% of the total. Example: A 100 gallon tank contains 80 gallons of propane.Answer: A standard 20 pound propane tank when safely full (80% full) , weighs the stamped “TW” (Tare Weight) plus 16.8 (the weight of 4 gallons of propane.. 4 x 4.2 LBS per gallon). So 17 + 16.8 = 33.8 pounds when full (again, depends on your tank Tare Weight so check the collar stamp). Propane is heavier than gasoline, with a gallon of gasoline weighing around 6. 3 pounds, while a gallon of propane weighs 4. 2 to 4. 3 pounds. This weight difference is a crucial factor to consider when comparing the two fuel options for various applications. A 33.5 lb propane tank has a maximum capacity of about 7.8 gallons or 35.5 litres. It is one of the larger tank sizes that are still reasonably portable. The 33.5 lb tank is quite a specific size of tank as opposed to the more …The weight of empty propane tanks depends on the size of the tank. A typical grilling propane tank has 20 lbs of gas and is stored in a 17-lb tank. This means that the total weight is 37 lbs and the empty tank weighs 17 lbs. Here are three simple ways for you to measure how much gas you have left and to know if you have an empty tank:The following steps outline how to calculate the Propane Gallons To Pounds using the formula: W = G * 4.23. First, determine the volume of propane in gallons (G). Next, use the formula W = G * 4.23 to calculate the weight of propane in pounds (W). Finally, calculate the Propane Gallons To Pounds.A gallon of propane weighs between 4.24 pounds and 6.09 pounds, depending on its temperature. The exact weight will vary based on the specific type of propane you’re using, but generally speaking, you can expect your gallon to weigh approximately 4.2 pounds when it’s at room temperature (70 degrees F).How much does a gallon of propane weigh in pounds (lb)? Propane density depends on temperature: at 90°F, a gallon of propane weighs 4.05 lb, and at 60°F a gallon of propane weighs 4.20 lb. You can consult how much propane weighs here. In most cases, we use a median propane density (4.11 lb/gallon) to calculate how many gallons does …An empty 500 gallon propane tank weighs about 1,180 pounds (535 kg). Liquid propane weighs 4.24 lbs/gallon (1.92 kg/gallon). Your 500 gallon propane tank can hold 400 gallons of propane inside, which weighs 1,696 pounds (769 kg). This tank's holding limit of 400 gallons is due to the 80% full rule for propane tanks.Here’s the weights of standard residential propane tanks, both empty and full. Size of Propane Tank. Weight of Tank When Empty. Weight of Tank When Full. 20 lbs. 16 – 18 lbs. 36 -38 lbs. 100 gallons. 215 lbs.The weight of propane in pounds can be determined by multiplying the number of gallons by 4.2. For example, a 20-gallon propane tank would hold approximately 84 pounds of propane (20 gallons * 4.2 lbs/gallon = 84 lbs).40 lb propane tank. The 40 lb propane tank is most commonly used for large commercial grills, construction heaters, space heaters, propane hawk torches and many other propane applications. A 40 lb propane tank holds 9.4 gallons of propane and weighs 72 lbs full. Precision Filled with Delivery & Exchange: $64.00 One cubic foot of propane gas weighs.1162 pounds, while one cubic foot of air weighs.07655 pounds. This means propane in its vapor state is heavier than air and will settle to the lowest level possible. Liquids, on the other hand, are normally weighed in terms of gallon. One gallon of liquid propane weighs 4.24 pounds, while one gallon of water ...
Every gallon of propane weighs 4.24 lb. And one pound of propane equals 0.236 gallons of volume. To determine how much propane is left, you can subtract the …. Is morgan wallen sober
First, check how much does a 20 lb propane tank weigh when empty (it’s written on the label). An average aluminum 20 lb propane tank weighs 13.5 pounds. This is your tare weight (weight of an empty tank). If you put such a 20 lb propane tank on a scale and it weighs 13.5 pounds, the 20 lb propane tank is empty.How much does 700 gallons of propane weigh? 700 * 4.26 lbs = 2,982 pounds. How much a human will weigh on mercury? if you weigh a 100 lbs, on mercury you will weigh 38 lbs. just multiply your ...The total empty weight of the horizontal tank is not standardized; an empty 120-gallon horizontal propane tank can weigh anywhere from 260 lbs to 300 lbs. Full Weight: 655 – 695 lbs. As we have mentioned above, we have to add 395 lbs of propane (that’s a weight of 96 gallons of propane) to the empty weight to get the 120-gallon horizontal ...The weight of a gallon of oil varies depending on the specific gravity (density). Most commonly, the weight of a gallon of oil refers to crude oil, a vital resource in the global energy industry. Crude oil can range from 7.2 pounds to 7.29 pounds per gallon. However, a gallon of heavy crude oil can weigh even more, sometimes up to 8.4 pounds.1. Engraved on the side of the tank should be the letters TW then a number. This number is the empty tank weight. For example, the typical 5 gallon (18.9 L) propane tank might say TW 17.2. The weight of the empty tank in the example is 17.2 lbs. 2. Weigh the tank on a bathroom scale to find the total current weight.The average weight is 552 pounds. Take the tare weight of the empty tank and multiply it by the weight of propane. The weight of a gallon of propane is 4.25 pounds. In a 100-gallon tank, you may fill 80 gallons of propane, which is an additional 804.25 = 340 pounds. The weight of a full 100 gallon tank is 212 lb + 340 lb = 552 lb.Amazingly, when propane is brought into a liquid form, it will only weigh half the weight of water. How much does a gallon of propane weigh? One U.S. gallon of propane weighs 4.23 pounds (1.91 kg)Aug 5, 2021 · The weight of a gallon of liquid depends on the density of the liquid. The density of a liquid can also vary a bit depending on its temperature. In common use temperature changes doesn't make big differences, so temperature changes can usually be ignored. Mathematical formula for converting pounds to gallons is: Gallon size * liquid density ... In order to learn how much a propane tank will weigh when full, you have to add the tare weight to the amount of propane in the tank. 15 pound propane tanks weigh about 12.7 pounds when empty. As a result, the tare weight of a 15 pound propane tank is 12.7 pounds. Whenever a 15 pound propane tank is full, that propane gas will weigh 15 pounds.Sep 2, 2014 · Answer: A standard 20 pound propane tank when safely full (80% full) , weighs the stamped “TW” (Tare Weight) plus 16.8 (the weight of 4 gallons of propane.. 4 x 4.2 LBS per gallon). So 17 + 16.8 = 33.8 pounds when full (again, depends on your tank Tare Weight so check the collar stamp). Propane weight per gallon is a fixed value, so you can easily calculate the propane weight in a full tank by multiplying the number of gallons by 4.2 (the weight of a gallon of propane). However, it’s important to note that the two largest tank sizes (500 and 1,000 gallons) are typically listed by their gallon capacity only. ...Propane weight per gallon is a fixed value, so you can easily calculate the propane weight in a full tank by multiplying the number of gallons by 4.2 (the weight of a gallon of propane). However, it’s important to note that the two largest tank sizes (500 and 1,000 gallons) are typically listed by their gallon capacity only. ...The following steps outline how to calculate the Propane Weight. First, determine the total volume of propane (gallons). Next, gather the formula from above = PRW = V * 4.24. Finally, calculate the Propane Weight. After inserting the variables and calculating the result, check your answer with the calculator above. Example Problem :Determining the Gallons of Propane a Cylinder Can Hold Written by Bobby Fisher. ... This means that when the 20# cylinder is empty it will weigh 18#. The other number is the WC (Water Capacity). Using the same example of a 20# cylinder, the WC will be followed by the number 47.6. This means that the cylinder will hold 47.6 pounds of water.The equation goes like this- tare weight + propane weight = total weight. It is simple math and you can get the tare weight off the collar of the tank. For example, if your tank weighs 25 pounds, and a propane gallon weighs 4.125 each, all you need is the number of gallons in the tank to get the answer..