Multiply your WC by .42 to find out how many pounds of propane your tank will hold. Or just enter it in the calculator. Let’s say your propane tank has 47.6 lbs stamped on the collar next to WC. 47.6 x .42 = 19.99 so you have a 20 lb. propane tank! When filled to 80% it will hold 20 pounds or 4.72 gallons of propane.If I remember correctly 1 pound of LP is about 21,500 BTU's so 100 lbs would be 2,150,000. So take the BTU's in the tank and divide it by the BTU's per hour of your unit and you'll get the hours of operation until your tank is empty. For example if your unit is 30,000 BTU's then your tank would last about 72 hours of burn time.A 20 lb. propane tank with 30,000 BTU usage can last for approximately 11 hours. A 30 lb. propane tank with 30,000 BTU usage can last for approximately 17 hours. A 40 lb. propane tank with 30,000 BTU usage can last for approximately 22 hours. A 100 lb. propane tank with 30,000 BTU usage can last for approximately 55 hours.Typically the water capacity (WC) and the tank’s weight while empty (TW) will be visible. If you are using a 100 lb propane tank, it will most likely be able to hold a capacity of around 118 lbs of propane. This means if you weigh your tank and it is 155 lbs, it means that you have about half a tank of propane left.May 2, 2022 by Mike Lee. hooking up 100 lb propane tank to rv. All the reasons why RV is a good investment for travelers would make a long and detailed list. For starters, traveling in an RV is financially viable as it saves a great deal of your money. With an RV, you can carry whatever you want and freely explore new places without sticking to ...How long does the average tank last? It depends on how much demand is placed on the tank by the appliance. Propane contains approximately 91,000 BTU's per gallon. If a consumer uses a propane tank to supply a grill that placed a 30,000 BTU per hour demand on the tank, a tank that has 3 gallons in it would last for about 9.1 hours.Gallons Of Propane = Weight Of Propane / Propane Density. In the case of a 100 lb tank, this means: Gallons Of Propane = 80 lb / 4.11 lb/gallon = 19.46 Gallons. Here you have it: A 100 lb tank holds 19.46 gallons of propane. Using this simple calculation, you can determine how many gallons of propane are in pretty much any propane tank.If your 40-pound propane tank has gallons in it then you can expect to run your generator for roughly 8 hours. This is under ideal conditions and the following factors may lower that use time: - The load on the generator will help determine fuel use. - The number of hours you will run the generator. - The fuel efficiency of the specific brand ...Advertisement Given that little history, you can see how criticism of think tanks abounds. Although they often bill themselves as "independent" and media outlets may portray think ...The frequency of refilling your propane tank for your fireplace depends on the size of the tank and how often you use the fireplace. On average, a standard 20-pound propane tank can last anywhere from 10 to 20 hours of continuous use.Have you often wondered why your propane is running out so quickly?? Or maybe you just want to know if you have enough propane to get through a week of RVing...Propane is the fuel of choice for many of those businesses when it comes to forklifts. One of the main reasons is its running time. On average, a 33-pound propane tank (the size used in the vast majority of forklifts) will last about eight hours. That’s an entire work shift without your forklift driver having to stop work to refuel.Sep 4, 2023 ... How long does a 1lb propane tank last? Well, small Propane tanks have an expiration date of 12 years from their manufacturing date. Once those ...Jul 28, 2023 · Estimating The Burn Time Of 100Lb Propane Tank. A 100lb propane tank contains approximately 23. 6 gallons or 89. 4 liters of propane. The burn time of a 100lb propane tank depends on its cfh rate and the device’s btu rating. As per industry standards, a 100lb propane tank with a 60,000 btu output can last up to 11 hours if used continuously. How Long Will 250-Gallon Tank Last = 18,300,000 BTU / 15,000 BTU/h = 1,220 h = 50 Days And 20 Hours. As you can see, for such heating demand, a 250-gallon propane tank will last 10 days shy of 2 months. We have calculated how long will a 250-gallon propane tank based on different heating needs. Here is the full calculated table: Mar 19, 2024 · The average propane tank for homes lasts five months. The most common tank size for a 2,500 sq ft. house or smaller is 500 gallons. With general use, a hundred gallons a month will be consumed by a combination of heat and appliances. [2] How long propane lasts depends on usage. While there are average consumptions for homes, the length of time ... Jul 28, 2023 · Estimating The Burn Time Of 100Lb Propane Tank. A 100lb propane tank contains approximately 23. 6 gallons or 89. 4 liters of propane. The burn time of a 100lb propane tank depends on its cfh rate and the device’s btu rating. As per industry standards, a 100lb propane tank with a 60,000 btu output can last up to 11 hours if used continuously. Overall, rental propane tank prices typically range from $50–$75 per year for a 250-gallon tank up to $100–$250 a year for a 1,000-gallon tank, not including the cost of propane. Pipe Length. Typically, a propane tank of more than 125 gallons must be installed at least 10 feet away from the side of a building and 10 feet from a property line.Dec 7, 2016 ... I am adding a 100lb Propane tank to my ... Worked well for me last year. ... They don't mind the "normal" size tanks as long as they are turned off.One method of purging a propane tank involves bleeding out the shipping air and then filling the tank with propane vapor instead of liquid propane. This process is repeated for sev...Typically the water capacity (WC) and the tank’s weight while empty (TW) will be visible. If you are using a 100 lb propane tank, it will most likely be able to hold a capacity of around 118 lbs of propane. This means if you weigh your tank and it is 155 lbs, it means that you have about half a tank of propane left.Now, let’s talk about how long a 100lb propane tank lasts when powering your outdoor grill. On average, a full tank provides about 1,500 to 2,000 hours of grilling time, depending on your grill’s BTU rating. That means, if you’re grilling for 3 hours every weekend, your tank should last for nearly a year to a year and a half.Best Answer. You can not answer that question without knowing more about the size of the hot water heater, the size of the stove and oven combo. How often the stove/oven is used, and how much hot ...As a rule of thumb, one tank of propane will typically last between 18-20 hours if you’re grilling on a medium-sized grill. Whereas larger grills can burn through 20 pounds of propane in as little as 10 hours. On average, you’ll use one or two pounds of fuel per meal if you use a medium-sized grill on high heat.Recreational Grilling. Anyone who owns a backyard gas barbeque grill uses the 20-pound tank. Typically, one 20-lb. propane tank lasts between 18 to 20 hours on a medium-sized grill. Larger grills with multiple burners can go through 20 pounds of propane in as little as 10 hours. We can break it down another way.10 Gallon Tank: You can use a large generator for half a day before the propane in a 10-gallon tank runs out. Smaller ones can last for up to five days! 120 Gallon Tank: A tank this size can run a whole house generator for up to 48 hours. It’s a great choice if you live where regular power outages are expected. 500 Gallon Tank: This size …Propane heaters can last 5 to 15 years depending on the heater unit, use, maintenance, and how it is stored when not in service. How long the propane will last depends on the size of the tank. If you have a 20-pound propane tank, it can run for 10 hours. A 15-pound tank can run for 18-20 hours. The lifetime of propane gas itself is …3 hours. According to the calculations: A regular indoor propane heater lasts 38 to 115 hours, depending on the heat settings. A patio heater lasts for 6 to 9 hours of heating on a 20lb propane tank. Industrial-grade heaters last for only 3-4 hours on a 20lb propane tank. You should use them with larger tanks instead.How long will a 1-lb propane tank last on a Blackstone griddle? A 1-lb propane tank will last at most 1.5 hours on a 17-inch griddle. A one-pound propane tank will stay less than one hour on the more significant griddles, 22-inch, 28-inch, and 36-inch. What sizes do propane tanks come in?How Long Portable Propane Tanks Last. Small, portable propane tanks, also called DOT tanks, are used for grills, water heaters, and fireplaces. They can be 20lbs to 100lbs. …Apr 8, 2024 · The answer is that a gallon of propane will last about 95 hours if burned at a rate of 1000 BTUs per hour. For example, if you have a cooktop with a BTU rating of 30,000 BTUs, then a gallon of propane will last 3.17 hours. There are other factors to consider when calculating how long a propane tank will last, like the tank size and the BTU ... A 100lb tank lasts for 192 hours on a strong 9,000 BTU/h indoor heater. That’s 8 days of continuous heating (which is usually way more than you need). You can expect a 100lb propane tank to last you for 3-4 weeks of …A 100 lb propane tank will contain 23 gallons of propane. Thus, when it is full, a 100lb propane tank will contain 493kg/m3 x 23 gallons totaling 11,339kg/m3, taking its weight to around 180 pounds when complete. This, in fact, amounts to 78% – 80% in cubic measure of the tank, so the molecules of propane have enough room to roam.How Long Will a 100 lb Propane Tank Last? Various families require different quantities of propane for their household use. This tank holds approximately 11.9825 gallons of gas when full. However, this tank can only accommodate up to 9.58 gallons, producing 881,360 BTUs. Suppose you use around 40,000 BTUs in an hour.Jul 22, 2022 · Use the numbers given to determine how much propane your heater or furnace uses, if the size isn’t there. For example, a 90,000 BTU furnace uses 3 times as much as a 30,000 BTU unit, so 3 x .328 = .98 gallons per hour. A 120,000 BTU furnace uses twice as much as a 60,000 unit, so 2 x .656 = 1.3 gallons. Tip 2: Factor whether the unit runs all ... On average, 100-pound propane tank will hold 23.6 gallons when it’s completely filled up. So, it’s best to stick to that measurement. Do not fill your tank with more than 25 gallons, as this can cause an explosion. PRO TIP – It’s best to go by the 80 percent rule. In other words, don’t fill your tank up by more than 80 percent of its ...Aug 26, 2020 · A recertified tank is good for 5, 7, or 12 years, depending on the method and type of recertification. How to tell if your propane tank is expired. The simplest way is to inspect the collar or handle area of your propane tank. Underground propane tanks have a slightly longer lifespan than above ground tanks due to the fact that the ground protects the tank from harsh weather. On average, underground propane tanks last about 30-40 years. Factors affecting the longevity of underground propane tanks include the installation method and the kind of soil surrounding the tank. The 500-gallon propane tank is the most frequent of all the residential propane tank sizes. When the cold weather arrives, you should at least know how long a 500-gallon gas tank will keep a house warm. Here’s how it works: A 500-gallon propane tank can last anywhere from one month to fourteen months and four days.Recreational Grilling. Anyone who owns a backyard gas barbeque grill uses the 20-pound tank. Typically, one 20-lb. propane tank lasts between 18 to 20 hours on a medium-sized grill. Larger grills with multiple burners can go through 20 pounds of propane in as little as 10 hours. We can break it down another way.A 100-gallon propane tank will last 1-2 days, while a 500-gallon tank can last 7-10 days. To use more portable propane cylinders, hook several together with a switchover valve. Generally, its good to have a tank that holds between 100 and 500 gallons of propane for a whole house generator. How long will Generac run on propane?Have you often wondered why your propane is running out so quickly?? Or maybe you just want to know if you have enough propane to get through a week of RVing...The common 20lb propane tank holds on average 432,000 BTUs. 41,000 goes into 432,000 10.53 times, which means you will get approximately 10.5 hours of heat time on a 20lb propane tank. There are various propane tank sizes and how long the propane tank lasts depends on the size of the tank, and how many BTUs your heater is.The amount of time you can expect a 100-pound propane tank to last when using it for heat highly depends on how often you use it. It also depends on the BTU of …In this example, the total propane usage per month for all three appliances is 35.4 gallons. If a 100-pound propane tank contains approximately 23 gallons of propane when full, then this tank would last for approximately 1.5 …Key Takeaways: The Coleman propane tank comes in various sizes, including the 16.4 oz or 1lb size.; The 1lb size tank provides approximately two hours of burn time when used with a small stove. Perform a simple water test to determine the propane level in the tank.In this example, the total propane usage per month for all three appliances is 35.4 gallons. If a 100-pound propane tank contains approximately 23 gallons of propane when full, then this tank would last for approximately 1.5 …Generally speaking, a 100lb propane tank should last between 15-50 hours on a standard stove. This can vary widely, however, depending on the factors listed above. For instance, if the stove is larger and more powerful, the same tank may only last 10-15 hours; and if the stove is efficient and well insulated, it may last up to 50 hours or more.So a 100 lb propane tank holds 23.6 gallons. 13 of 19 found this helpful. How long does a 100 pound propane tank last? At a consumption rate of 26,000 BTU per hour, your 100-pound bottle will fuel your propane fireplace for about 84 hours, equivalent to 3.5 days of continuous 24/7 operation.1 lb propane tank lasts for 1-1/2 hours at maximum level. However, it also depends on the type of cylinder you’re using. If you’re using a Coleman propane tank, it usually lasts for a long. On medium heat, it lasts for 3 hours and 45 …Federal guidelines set limits on how long a propane tank (that includes your grill tank) can safely be used before it needs to be either tested and recertified or …Want to know how to clean a water softener resin tank? Check out our guide on How to Clean a Water Softener Resin Tank now and find out! Advertisement For those homes that are on a...Aug 11, 2010 · 3 posts · Joined 2010. #2 · Aug 11, 2010. we use a 20 lb at deer camp on a normal 4 burner stove and it will usually last about 10-12 weekends with 5-6 meals per weekend and on cold days we use it in the morning to get the chill out of the air i would guess a 100lb should last close to 2 months straight. One gallon of propane is approximately able to produce 92,000 BTUs, so a 30 lbs propane tank can produce about 2,760,000 BTUs. There are many different factors that control how long a 30-pound propane tank will last. Some of these include appliance type and size, BTU rating of the appliance, and if the appliance runs constantly or turns off and ...A disposable 14 or 16 ounce propane tank will last about 1.5 to 2 hours. A standard 20 lb propane tank should last about 18-20 hours on most grills. We always …The average propane tank for homes lasts five months. The most common tank size for a 2,500 sq ft. house or smaller is 500 gallons. With general use, a hundred gallons a month will be consumed by a combination of heat and appliances. [2] How long propane lasts depends on usage. While there are average consumptions for homes, the length of time ...One gallon is equal to 4.24 lbs. of propane. Thus a 100 pound cylinder, which can hold 100 pounds of propane at most, can contain around 23.6 gallons of propane. There are other things that can also affect the quantity of propane in a 100 pounds tank. Most important is the temperature, and another one is water quality.Generally, a 100lb propane tank can last between 18-24 hours, depending on the quality of the tank and the size of the grill. Some factors that may affect the tank’s …A 100-gallon propane tank will last 1-2 days, while a 500-gallon tank can last 7-10 days. To use more portable propane cylinders, hook several together with a switchover valve. Generally, its good to have a tank that holds between 100 and 500 gallons of propane for a whole house generator. How long will Generac run on propane?Jan 24, 2023 ... We got tired of filling our 30# Propane tanks to we got a 100Lb Propane Tank to make life a little easier. Rving during winter and being in ... If your propane grill burns at 60,000 BTU per hour, this means that one gallon of propane will burn for 1.53 hours. The burn rate of the appliance is therefore 1.53 hours per gallon of propane (92,000 BTUs/60,000 = 1.53 hours). Determine how many hours of propane you have left by dividing the total gallons of your tank by your appliance’s ... Overall, rental propane tank prices typically range from $50–$75 per year for a 250-gallon tank up to $100–$250 a year for a 1,000-gallon tank, not including the cost of propane. Pipe Length. Typically, a propane tank of more than 125 gallons must be installed at least 10 feet away from the side of a building and 10 feet from a property line.If I remember correctly 1 pound of LP is about 21,500 BTU's so 100 lbs would be 2,150,000. So take the BTU's in the tank and divide it by the BTU's per hour of your unit and you'll get the hours of operation until your tank is empty. For example if your unit is 30,000 BTU's then your tank would last about 72 hours of burn time.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 ...Using the averages, we can neatly estimate for how many months and days will a 1,000-gallon propane tank last. We’ll look at another example to illustrate how this calculation is made. Further on, you will find a table of how long should a 1,000-gallon propane tank last for average houses with square footage between 500 sq ft and 4,000 sq ft.In conclusion, the lifespan of a typical propane tank when used for grilling can vary depending on the tank's size, the type of grill being used, and the frequency and duration of grilling sessions. A 20-pound propane tank, commonly used for grilling, can provide an average of 18 hours of grilling time.The 500-gallon propane tank is the most frequent of all the residential propane tank sizes. When the cold weather arrives, you should at least know how long a 500-gallon gas tank will keep a house warm. Here’s how it works: A 500-gallon propane tank can last anywhere from one month to fourteen months and four days.When they did this, they put in a 100 lb propane tank. Not sure how long it will last us, but the previous owner said about 3 months. 100 ...About 90% of forklifts use an eight gallon (33 pound) tank of liquid propane. If your LPG forklift has a four-cylinder engine, the tank should last about eight hours. Bigger engines reduce fuel efficiency, just like cars. Just as a Chevy Spark will go a lot farther on eight gallons of gas than an F350 Dually, a V6 forklift engine will burn ...The answer is that a gallon of propane will last about 95 hours if burned at a rate of 1000 BTUs per hour. For example, if you have a cooktop with a BTU rating of 30,000 BTUs, then a gallon of propane will last 3.17 hours. There are other factors to consider when calculating how long a propane tank will last, like the tank size and the BTU ...The answer to the question of how long a 100lb propane tank will last for cooking depends on several variables, such as the cooking appliance’s fuel consumption rate, the frequency and duration of cooking sessions, and the weather conditions. On average, a 100lb propane tank can last anywhere from 20 to 30 hours of cooking time. ...If asking about the length of time your fuel supply will last when burning your appliance: This is easy to figure out if you know the following: The number of pounds of …Have you often wondered why your propane is running out so quickly?? Or maybe you just want to know if you have enough propane to get through a week of RVing...How long does a gas tank in a fireplace last? On a 20 pound propane tank, the average gas fire pit will last 3 to 6 hours. A tank can last as long as 9 hours or as little as 1-1/2 hours, depending on the BTU rating of your fire pit. Approximately 430,000 BTUs are contained in a 20-pound propane tank.Apr 8, 2024 · The answer is that a gallon of propane will last about 95 hours if burned at a rate of 1000 BTUs per hour. For example, if you have a cooktop with a BTU rating of 30,000 BTUs, then a gallon of propane will last 3.17 hours. There are other factors to consider when calculating how long a propane tank will last, like the tank size and the BTU ... Jul 22, 2022 · Use the numbers given to determine how much propane your heater or furnace uses, if the size isn’t there. For example, a 90,000 BTU furnace uses 3 times as much as a 30,000 BTU unit, so 3 x .328 = .98 gallons per hour. A 120,000 BTU furnace uses twice as much as a 60,000 unit, so 2 x .656 = 1.3 gallons. Tip 2: Factor whether the unit runs all ... Highlights. Multi-valve 100 lbs. tank: includes a service valve, high-capacity filler valve with integral back-check, pressure relief valve (375 PSIG ) and a POL valve, all in 1 single unit. On-site refilling: no need to transport your tank to get refilled, the multi-valve 100lb tank allows you to do on-site refilling of your propane gas ...In this example, the total propane usage per month for all three appliances is 35.4 gallons. If a 100-pound propane tank contains approximately 23 gallons of propane when full, then this tank would last for approximately 1.5 …ORDER GAS NOW, IF PROPANE TANK GAUGE READS LESS THAN 30%! 30%. 36. 75. 97. 150. 300. 20%. 24. 50. 65. 100. 200. 10%. 12. 12. 32. 50. 100. Almost all Ressler Propane tanks have a gauge located on the tank. View the photos below to determine how to read the propane tank located on your property. Most propane tank gauges read …Tank Size Options: Residential propane tanks come in various sizes, commonly ranging from 20 pounds (5 gallons) to 1,000 gallons. For occasional use of the appliance, a smaller tank (like 100 or 250 gallons) might suffice. For more frequent use or multiple appliances, consider larger tanks (500 or 1,000 gallons).Propane contains approximately 91,000 BTU's per gallon. If a consumer uses a propane tank to supply a grill that placed a 30,000 BTU per hour demand on the tank, a tank that …The average propane tank will last for around 18-20 years. However, this can vary depending on a number of factors, such as the quality of the tank, how well it is maintained, and how often it is used. A tank that is well-maintained and used regularly may last for 30 years or more. A tank that is not well-maintained, or one that is only used ...Oct 28, 2009 ... BTW, the cap shown in the pic is from an O/A cylinder. It's just sitting there to keep the snow and ice (coming soon) off of the valve. I'm ...How Long Will 250-Gallon Tank Last = 18,300,000 BTU / 15,000 BTU/h = 1,220 h = 50 Days And 20 Hours. As you can see, for such heating demand, a 250-gallon propane tank will last 10 days shy of 2 months. We have calculated how long will a 250-gallon propane tank based on different heating needs. Here is the full calculated table:If the scale reads 30, that tells you that you have 12 pounds of propane left in the tank. How Long are RV Propane Tanks Good For. There is another expiration limit you should be concerned about. That time limit refers to how many hours will a propane tank last. A standard propane tank may hold about 4 1/2 gallons give or take a few quarts.
How Long a 40 lb, 100 lb, or 420 lb Propane Tank Last Running an RV Fridge! Fridge Size 40 lb (18.1 KG) Propane tank last 100 lb (45.3 KG) Propane tank last 420 lb (190.5 KG) Propane tank last; 60 – 115 Liters 2 – 4,1 Cubic feet: 67 days: 169 days: 708 days: 133L – 180 L *4,7 – 6,3 Cubic feet:. Free unzipping
100 Pound Propane Tank. 100 pound propane tanks allow for a much higher demand but are not very portable for the average camper. They are approximately 15 x 48 x 15 inches in size. They weigh approximately 80 pounds empty. They hold approximately 23 gallons of propane (which weighs approximately 97 pounds).The size of the tank (i.e. 20 lb, 40 lb, 100 lb) The frequency and duration of grill usage; The temperature at which the grill is used; The number of burners and their BTU output; While there are many variables at play, a 40 lb propane tank can last anywhere from 18-20 hours of straight usage on a medium-sized grill.The average time a Propane tank lasts = 640500 / 50,000 = 12.81 (12 hours 48 minutes 36 seconds) With a 30 lb tank in ideal conditions, you can survive up to 12.81 hours of continuous stovetop, water heater, and heater usage in your RV. How Long Does a 20lbs Propane Tank Last in an RV? A 20 lbs propane tank has an average of 4.6 …The answer is that a gallon of propane will last about 95 hours if burned at a rate of 1000 BTUs per hour. For example, if you have a cooktop with a BTU rating of 30,000 BTUs, then a gallon of propane will last 3.17 hours. There are other factors to consider when calculating how long a propane tank will last, like the tank size and the BTU ...Overall, rental propane tank prices typically range from $50–$75 per year for a 250-gallon tank up to $100–$250 a year for a 1,000-gallon tank, not including the cost of propane. Pipe Length. Typically, a propane tank of more than 125 gallons must be installed at least 10 feet away from the side of a building and 10 feet from a property line.If your 40-pound propane tank has gallons in it then you can expect to run your generator for roughly 8 hours. This is under ideal conditions and the following factors may lower that use time: - The load on the generator will help determine fuel use. - The number of hours you will run the generator. - The fuel efficiency of the specific brand ...The answer to the question of how long a 100lb propane tank will last for cooking depends on several variables, such as the cooking appliance’s fuel consumption rate, the frequency and duration of cooking sessions, and the weather conditions. On average, a 100lb propane tank can last anywhere from 20 to 30 hours of cooking time. Once again it’s stamped on the propane tank collar. Per DOT regulations propane tanks (larger tanks) need to be recertified every 12 years from the date of manufacture and every 5, 7, or 12 years thereafter depending upon how the last certification was performed. This tank would need to be requalified on 4/2020. Jan 21, 2011 ... what can I do to correct this, what has worked for you? The tank will last me on average a month when my furnace is set a 41 deg. and I just ...Mar 24, 2014 ... The 100lb tank holds 20 gal.If you are gonna forge everyday,get a 250 gal. tank set up out back.It's a good bit cheaper for a commercial account ...Propane contains approximately 91,000 BTU's per gallon. If a consumer uses a propane tank to supply a grill that placed a 30,000 BTU per hour demand on the tank, a tank that …1 lb propane tank lasts for 1-1/2 hours at maximum level. However, it also depends on the type of cylinder you’re using. If you’re using a Coleman propane tank, it usually lasts for a long. On medium heat, it lasts for 3 hours and 45 minutes; on low flame, the duration increases.Typically the water capacity (WC) and the tank’s weight while empty (TW) will be visible. If you are using a 100 lb propane tank, it will most likely be able to hold a capacity of around 118 lbs of propane. This means if you weigh your tank and it is 155 lbs, it means that you have about half a tank of propane left.Next, you should multiply the number of hours by the number of gallons in the tank. If you are using a 100 lb tank, then you will be able to hold 23.5 gallons of propane. The amount of use will vary depending on your grill and BTUs per hour.100 Pound Propane Tank. 100 pound propane tanks allow for a much higher demand but are not very portable for the average camper. They are approximately 15 x 48 x 15 inches in size. They weigh approximately 80 pounds empty. They hold approximately 23 gallons of propane (which weighs approximately 97 pounds).Propane tanks are built for the long haul: on average, a high quality, properly maintained galvanized aboveground propane tank or propane cylinder should last 30 years or more, while some aluminum and composite cylinders can last even longer. Much of the propane tank longevity equation comes down to the size and use of the tank and how well it ....