How Much Does A Gallon Of Oil Weigh

 If someone asks you, how much does a gallon of oil weigh? You cannot give a response if you don’t know the answer correctly. What you know or don’t know is not important to us. But it’s important for us to inform you about one gallon of the oil weight. Accordingly, to international standards, 1 barrel of oil is equal to 42 US gallons, and one barrel of oil is 15.987294928 liters. 

Now it can be said by this equation that the volume of 1 barrel of oil is 159 liters. It’s necessary to keep in mind the weight of oil depends on concentration. The weight of a gallon of oil depends on temperature, density, and pressure. No need to mention again that temperature is a big factor in changing the weight of oil.

How Much Does A Gallon Of Oil Weigh

Some factors of oil weigh


Viscosity is defined as the tendency of a fluid to block flow. The weight of oil can be different according to the variety of viscosity & uses of viscosity modifiers.


What is the Viscosity of Oil? How To Measure it

The Definite Guide of Viscosity Modifiers


Temperature may be defined as the condition of cold or hot. Thin temperature affects the concentration of oil substances, and thin concentration also affects the weight of oil. As a gallon of oil weighs, it changes.


The variation pressure of oil changes the oil weight. Pressure is the other main factor that affects the structure of the oil. That’s the reason for the variation in the oil weight. 

Comparison between oil weight and water weight.  

The comparison between oil weight and water weight depends on the thin or thick nature. For example, the oil will weigh more than water. There are some reasons for it, Like oil being thinner than water. When we try to mix oil and water together, you will find that the mixer is not soluble. For this reason, water is denser than oil.

How Much Does A Gallon Of Oil Weigh?

For a better understanding, see the tables below:

Amount of GallonWeigh (Different Units)
7.61 Pounds
3.78 L
128 Ounces
3.45 Kg
1231 cubic inches

How Much Does A 55-Gallon Drum Of Oil Weigh In Pounds?

Sometimes you may need to know about a 55 Gallon Drum of Oil weigh a pound, here you can visualize this very easily

Type Of 55 – Gallon DrumAverage Weight (Ibs)Average Weight ( Kg)
Fiber Drum17 7.7 
Red Plastic Drum Open -Closed Top22 10 
Nestable Plastic Drum24 10.8  
Plastic Drum Open Top25 11 
Lined Steel Drum Open Top45 20 
Stainless Steel Drum Open Top50 23 

Some Common Oil Weigh Details

Crude oil

If we think about Middle East countries like the United Arab Emirates, Saudi Arabia, Bahrain, Iraq Iran, then we will understand that the economy in the country is mainly dependent on crude oil. Base Oil of lubricants & different fuels come from this crude oil.

It was seen that the whole world is dependent on these countries for oil. So it is easy to understand that there is a huge market in our world. Fat is also found in these countries. The unknown oil in the barrel weighs 7.2 pounds per gallon. This crude energy is used in our daily activities. 

For example, in the case of vehicles, in the case of electricity generation, plastics, or in various industries. The most interesting thing is how the temperature effect is not noticeable in these oils.

Recycle motor oil

This type of oil is thinner in many parts than normal motors. Usually, about seven pounds per gallon. Such oils are very sensitive to viscosity. So the weight of the oil changes as the viscosity changes.

Body oil

Neutrogena Fragrance Body Oil is formulated to protect the skin from various types of damage and is suitable for dry skin. It is available at any drugstore. Body oil weighs 7 pounds per gallon, meaning it is much lighter than other oils. 

All the oils we use are crude oils, and they are thick. But body oil is very light because it is a processed oil.

Cooking oil

Cooking oil is used to lubricate our automobile engines, and it is very light. Also, its density is lower than other oils we use to lubricate our automobile engines. Corn and vegetable oils are the two types of cooking oil used, and both oils weigh 8 pounds per gallon.


Glycerin is used in beauty enhancement. It is also known as glycerol and is a special type of oil with a colorless, odorless, and sweet taste. But because of its higher density, it also weighs more. Glycerin weighs 10.5 pounds for 4.76 kg per gallon.

 Coconut oil

Currently, coconut oil has gained a lot of popularity among celebrities for good health. According to celebrities, the benefits of coconut oil are:

  • Get rid of belly fat
  • Helps control appetite
  • Boosts immunity
  • Helps prevent heart disease


Q. How much does a gallon of motor oil weigh?

A gallon of motor oil weighs 7 pounds per gallon. Cooking oil is heavier than motor oils. This weighs around 7.6 pounds per gallon.

Q. What is heavier, a gallon of water or oil?

Water is heavier than oil because of the difference in density. One gallon of oil weighs about 6.84 pounds.

Q. How much does a gallon of 15W40 oil weigh?

According to the density. 15W40 has a density that is about .879 kilograms per liter. One gallon is about 3.785 liters. In addition, two numbers get us our weight, at approximately 3.327 kilograms.

Q. How much does a gallon of water weigh?

One gallon of water weighs 8.3454 lbs (3.7854 kg). But the effect of temperature, 2 gallons of water weighs 16.69 lbs (7.57 kg)


Now, if someone asks you again, how much does a gallon of oil weigh? Hope you can now give the correct answer with the knowledge gained from our article. Due to the variety of oils available worldwide, it is natural to have variations in size or weight. It is important to keep your knowledge about the weight of oil without fear of this variation. At the end of the day, this knowledge will go a long way in measuring oil. And this is our expectation.

Read Also: What Is The Weight Of A Quart Of Oil?


Rio is a car & motorcycle mechanic who is working with different kinds of problems relating to oil and grease. He is also a passionate technical writer.