Naija LPG Blog: Repairs, Maintenance, Depot Prices and Gas Price Calculator LPG Gas Level: How To Calculate Gas Remaining In A Cylinder?

LPG Gas Level: How To Calculate Gas Remaining In A Cylinder?

Just make sure you have enough LPG gas in your gas bottle to get you through the next cookout. You wouldn't want to get cut-off during cooking or get disappointed at late night. 

Not all LPG regulators comes with gas level gauge/meter, which means you will have to find some other way to tell how much LPG gas is left in the gas bottle. Here are three simple ways for you to do just that:

1. The Use Of Warm Water

This simple trick to determine how much LPG gas is left in your cylinder bottle, is performed like this:

i. Fill a small bucket warm to hot tap water.

ii. Pour the water down the side of the gas cylinder.

iii. Run your hand along the side of the cylinder bottle and feel for a cool spot.

The top of the cool spot is the fill LEVEL of the gas bottle. It's cool because liquid LPG inside the gas bottle absorbs heat around it surroundings, some of the liquid LPG then boils to produce vapour. Heat is needed to convert the liquid to vapour (known as the Latent Heat Of Vaporization). This explains why the gas bottle feel cold when touched and why if there is a high heat, water or ice may appear on the gas bottle. Do not use boiling water, carefully slowly pour the hot water down the one side of the container. A line of condensation may appear, indicating the gas level. If not, wait a few seconds and then run your hand down the same side of the gas bottle, where you poured the hot water. 

2. Weigh The Gas Cylinder Bottle: 

An alternative way is to scale the gas bottle. The Tare (empty) weight of the bottle is stamped on the neck ring. The difference between the scale reading and the Tare weight should indicate approximately how much gas remains in the tank. You can basically find all the information you need on the neck ring handle - the Water Capacity (WC), Tare Weight (TW) and LPG Worth (LW).

Most cylinder bottles weigh about 50kg when empty and hold about 45kg of LPG gas. To measure how much kg of LPG gas reminant in your gas bottle, simply weigh it on a digital scale and subtract the Tare Worth (TW) figure found on the neck ring. For example, if a 6kg gas bottle weighs 8kg on a scale, it means there is about 2kg of LPG gas remnant in it. Digital scale provides more accurate figure, with digital readings on the dashboard. This can help you calculate better compared to other form of scale. 

3. Install An External Gauge:

Most LPG regulators comes with an gas level gauge/meter attached with them, which allows you to know the level of LPG gas remnant in your gas bottle. Also called the pressure gauge, regulators such as the Quick-On+ Longtime Low Pressure Regulator, measures pressure to determine how full the gas bottle is. You can purchase the gauge at your local hardware store, gas shops. So does Amazon, Alibaba and E-bay have them available.


Q: How can I calculate how much gas is left in a cylinder?

A: You can calculate the remaining gas by knowing the cylinder total capacity and either measuring its current pressure or weight.

Q: What do I need to calculate gas remaining using pressure?

A: You need to know the cylinder total capacity and measure the current pressure inside. Use a formula to find the remaining gas based on initial and current pressures.

Q: How do I calculate gas remaining using weight?

A: Measure the cylinder weight when full and again when you want to know how much gas is left. The difference in weight gives you the remaining gas.

Q: Can I calculate gas remaining without specialized equipment?

A: Yes, you can estimate gas remaining using simple formulas if you know the cylinder tare weight capacity and technical details.

Q: When should I check how much gas is left in a cylinder?

A: It's good to check before starting a task using gas to be sure you have enough for the job and to avoid running out unexpectedly.

Q: What should I do if I'm unsure about calculating gas remaining?

A: If you're unsure or need precise measurements, ask for help from someone experienced with handling gas cylinders or consult the cylinder supplier.

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We provide news, information on all LPG related services, including construction, prices and repairs. Our goal and mission is to make LPG gas available and accessible to every household in Nigeria.

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