We&#;ve all been there before - everyone gathered out on the deck or patio enjoying the weather and fun conversation. The food is ready for the grill, and suddenly you realize you&#;re out of propane, or don&#;t have enough left in the tank to feed your guests. 

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While such a last-minute revelation is easily solved with a quick trip to your local Ferrellgas location or a Blue Rhino exchange station, there are a number of handy tricks you can use to determine ahead of time whether you have enough propane for your event. Below, we&#;ll outline four methods that will help you check your propane tank level. 

How to check the level of a propane tank

1. The warm water, cool hand method

This is the quickest and easiest way to get a feel for the propane level in your tank. Simply pour warm water over your tank, and then run your hand along the side of the tank.

As you reach the level of propane in your tank, the temperature will turn cool to the touch. This method relies on a physical reaction between the hot water on the tank surface and the propane inside your tank - creating a temperature difference you can feel. As the hot water heats the tank&#;s exterior, the propane reacts, creating a cool spot at the fill level. This method won&#;t give you a precise reading, but it will allow you to estimate how close you are to needing a tank exchange. 

2. Using a gauge

This simple solution gives users an instant-read on measuring the level of their portable liquid propane gas tanks. Most portable LPG cylinders equipped with gauges express the volume of propane in terms of percentage of full - showing 100 percent when the tank is full with 20 pounds of propane, then dropping during use. 

Such gauges work from pressure inside the tank, and make a determination of remaining levels. This style of pressure reading gauge can be found in home repair and retail outlets throughout the country. They are inexpensive, easy to install, and easy to read. Once yours is in place, you&#;ll simply remove it when the tank is depleted and install it on your next one. 

3. For More Precision: Tipping the Scale Method

This method offers a more precise measurement, but it requires some effort to disconnect your propane tank from the grill. You&#;ll also need a household scale and the patience to perform a few simple calculations. 

Propane tanks generally are stamped with an empty or &#;tare&#; weight - usually between 17 and 19 pounds. A standard sized propane tank when filled holds 20 pounds of propane. Place the tank on your scale to get the total weight, and then subtract &#;tare&#; weight to determine how many pounds of propane is left in your tank. 

Pounds of propane remaining = [tank weight in lbs] - [&#;tare&#; weight: 17-19 lbs] 

The formula can be carried out further to determine the number of gallons, and beyond, to estimate the amount of cooking time left in your tank. Take your net weight divided by 4.2 to convert the reading to gallons.

Gallons of propane = tank weight in lbs.  /  4.2 

A gallon of propane contains approximately 92,000 BTUs, and a reading of your grills BTU per hour rating can offer a rough estimate of cooking time left in your tank. 

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4. The Mathematician Method: How Much Cooking Time Do You Have Left

Get out your calculator, because this complex method of determining how much propane is in your tank requires several steps through the world of mathematical formulas. Yet it is one of the most accurate approaches to estimating your propane levels - and can be used in a predictive manner as you deplete your tank. 

Remember these figures: A full tank contains 20 pounds of propane, the weight of propane divided by 4.2 converts the units into gallons, and a gallon of propane produces roughly 92,000 BTUs of energy. To complete the formula you&#;ll need to know the BTU per hour rating of your grill, and you&#;ll need to factor in the heat setting you plan to use while grilling. 

For example, to determine the minimum amount of cooking time you can expect you&#;ll be able to cook with a full tank, you can use the formula: 

                                                                         ((20/4.2)x(92,000))

                                  Cooking Time =        _______________________

                                                                    Max BTU per hour of grill 

If you want to learn more, please visit our website Propane Tank Gauge Level Indicator.

In this case, your propane tank has 4.76 gallons of propane capable of delivering about 438,000 BTUs. If your grill is rated for 30,000 BTU per hour on the high setting (438,000/30,000) you can expect between 14 and 15 hours of cooking time on the highest setting. 

How to adjust for different cooking temperatures

To make adjustments for cooking temperature, you&#;ll have to include something known as the &#;K&#; factor, which assigns a numerical value to cooking temperature. For instance, only using 3 burners on a 4 burner unit, on a medium setting, is assigned a K factor of .56. Alter the previous formula to account for the K factor would appear as this: 

                                                                           ((20/4.2)x(92,000))

                                  Cooking Time =        _______________________

                                                                               (.56 x 30,000) 

This means at the lower usage, you could expect around 26 hours of cooking time. 

While somewhat complicated, this formula can be a fun exercise, and with some tweaking could help you predict not just how much cooking time you&#;ll have, but how much propane you&#;ve used with each outing. 

How do you know if your propane tank is expired?

Most portable tanks are stamped with a manufacture or test date, along with an inspector&#;s mark. While this is something to be aware of, it&#;s generally not something you&#;ll have to worry about. Portable propane tanks last between 10-12 years, and the professionals at Ferrellgas and Blue Rhino ensure that newer tanks are worked into circulation on a regular basis. 

Easily exchange your empty propane tank at a Ferrellgas location near you

Equipped with these formulas and tools, you shouldn&#;t ever find yourself without propane when you need it most. But, if you ever do, remember that you&#;re never far away from the fuel you need for your backyard gatherings. Using this easy location finder, you&#;ll be back to the barbecue in no time. 

Three Ways to Tell How Much Gas Is Left in Your Propane Barbecue Cylinder

We&#;re at the height of outdoor living season here in Connecticut &#; time to get out and cooking on your propane barbecue grill! Just make sure you have enough propane to get you through your next summer cookout.

There is one small problem, however: as any veteran propane griller knows, most 20-pound propane barbecue cylinders don&#;t have a gauge &#; which means you will need some other way to assess how much fuel is left in your tank.

Here are three simple ideas for you to do that:

1. Use warm water. The FiX IT Home Improvement Channel shared this safe and simple trick to determine how much propane is left in your tank. To do it,

• Fill a small bucket with warm to hot tap water.
• Pour the water down the side of the tank.
• Run your hand along the side of the tank and feel for a cool spot.

The top of the cool spot is the fill level of the tank (it&#;s cool because liquid propane inside the tank absorbs heat from the water, which makes the metal wall of the tank cool to the touch).

2. Weigh the tank. Most propane grill tanks come with two numbers stamped on the handle &#; the water capacity (&#;WC&#;) and &#;Tare Weight&#; (TW &#; the weight of the tank when it&#;s empty). Most grilling tanks weigh about 17 pounds when empty and hold about 20 pounds of gas.

To measure how many pounds of propane are left in your tank, simply weigh it on a scale and subtract the TW number. For example, if a tank weighing 27 pounds has a TW of 17 pounds, there&#;s about 10 pounds of gas left &#; a little more than half a tank.

3. Install an external gauge. External propane tank gauge options include:

• Inline pressure gauges install between the gas line from the grill and the cut-off valve on the tank, measuring pressures to determine how full the tank is.
• Analog propane scales look like luggage scales and are pre-set to take your tank&#;s TW into account.
• Digital propane tank scales provide a digital readout of remaining cook time and gas fill percentage. Some even come with smart apps.

Pick the gauge you like (your local hardware store has them; so does Amazon) and give it a go!

Don&#;t get burned by your propane cylinder &#; follow these tips to know how much gas is left in your tank before your next summer soirée! If you run out of propane, don&#;t panic &#; just visit one of our convenient Connecticut showrooms for a propane cylinder refill!

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