The standard weight of ethylene glycol-based antifreeze is about 9.35 pounds per US gallon at 68°F, which translates to a density of 1.12 g/ml. The exact weight of liquid antifreeze depends on its features like chemical composition and temperature.
But if you don’t feel like calculating and would rather just get the values from a chart, you’ve come to the right place.
We at PowerSportsGuide have compiled the most common conversion numbers into one antifreeze weight chart!
What is Antifreeze?
Antifreeze is a colored liquid typically made of ethylene glycol or propylene glycol. This additive is intended to lower the freezing point of any water-based liquid. Additionally, using antifreeze raises the boiling point as well.
However, as the name suggests, antifreeze is typically used in cold environments to lower the freezing point of liquids, especially engine coolants.
Although antifreeze and coolant are often used interchangeably, the latter is a mixture in which antifreeze is one of the main ingredients. You can create coolant by mixing antifreeze with water as a rule of thumb. As far as the mixing ratio, the general recommendation by manufacturers is 50:50.
This mixture is commonly used in vehicles featuring water-cooled engines to avoid damage during the winter months. Without antifreeze, the cooling water in the engine and cooling system would freeze, resulting in severe damage.
This is where antifreeze comes into play.
Mixing water with antifreeze creates a coolant that stays in liquid form even at lower temperatures.
On the other hand, antifreeze raises the boiling point of the coolant, which can prevent overheating issues as well.
Because of this, virtually every “water-cooled” vehicle uses coolant, which is typically a mixture of water and antifreeze.
What is Antifreeze Made of?
One of the main components of antifreeze is propylene glycol or ethylene glycol. The latter is typically used for formulating automotive antifreeze. Besides these major components, antifreeze may contain other additives, like azoles, silicates, or nitrates (sometimes borates).
These additives make up less than 10% of the mixture.
The exact chemical compound affects the properties of the antifreeze like its freezing point, boiling point, viscosity, and density.
When it comes to the propylene glycol and ethylene glycol comparison, each has its own pros and cons.
The key advantage of ethylene glycol is its greater efficiency, but it’s also accompanied by high toxicity. In contrast, propylene glycol makes the coolant less thermally efficient at lower temps but it has very little toxicity.
This is no surprise since propylene glycol is commonly used in cosmetics, beauty, and personal care products.
What is the Standard Weight of Antifreeze?
As a rule of thumb, the standard weight of antifreeze at 68°F is about 9.35 pounds per US gallon, equal to 1.12 g/ml. These hard numbers are for ethylene glycol-based, non-mix antifreeze liquids.
Ethylene glycol is by far the most significant component of an automotive antifreeze; this is why the density of these liquids is almost the same.
Based on that, the weight of one gallon of antifreeze at 68°F in various units of measurement is about as follows:
- 1 US gallon of antifreeze = 9.35 pounds
- 1 US gallon of antifreeze = 149.6 ounces
- 1 US gallon of antifreeze = 4.24 kg
- 1 US gallon of antifreeze = 4241.1 grams
Antifreeze Weight-per-Gallon Chart
For your convenience, we’ve listed the most common conversion numbers in this antifreeze weight-per- gallon chart:
| Volume (US gallons) | Weight (lbs) |
| 1 gal. | 9.4 lbs |
| 2 gal. | 18.7 lbs |
| 3 gal. | 28.1 lbs |
| 4 gal. | 37.4 lbs |
| 5 gal. | 46.8 lbs |
| 6 gal. | 56.1 lbs |
| 7 gal. | 65.5 lbs |
| 8 gal. | 74.8 lbs |
| 9 gal. | 84.2 lbs |
| 10 gal. | 94 lbs |
| 20 gal. | 187 lbs |
| 30 gal. | 281 lbs |
| 40 gal. | 374 lbs |
| 50 gal. | 468 lbs |
| 55 gal. | 514 lbs |
| 60 gal. | 561 lbs |
| 70 gal. | 655 lbs |
| 80 gal. | 748 lbs |
| 90 gal. | 842 lbs |
| 100 gal. | 935 lbs |
| 200 gal. | 1870 lbs |
| 250 gal. | 2338 lbs |
| 300 gal. | 2805 lbs |
| 330 gal. | 3086 lbs |
| 400 gal. | 3740 lbs |
| 500 gal. | 4675 lbs |
This is just for informational purposes only! Density may vary depending on the type, the manufacturer, and the temperature.
FAQs About the Weight of Antifreeze
What is antifreeze made of?
Antifreeze can be made of either propylene glycol or ethylene glycol. Beyond these major ingredients, antifreeze may contain some other additives like nitrates, silicates, borates, or azoles. These ingredients make up less than 10% of the mixture in most cases.
Is antifreeze the same as ethylene glycol?
Antifreeze is not the same as ethylene glycol as it may contain some extra additives. However, more than 90% of automotive antifreeze liquid is ethylene glycol. Also, certain antifreeze liquids are made of the more toxic propylene glycol.
What’s the density of antifreeze?
The density of ethylene glycol-based antifreeze is about 1.12 g/cm3 at 68°F.
How much does antifreeze weigh per gallon?
The weight of ethylene glycol-based antifreeze is about 9.35 pounds per gallon at 68°F.
Is antifreeze heavier than water?
Antifreeze is heavier than water as its density is 1.12 g/cm3, while water density is about 1 g/cm3.
Does antifreeze sink or float in water?
Since antifreeze has a higher density, it sinks in water.
How much does 1 gallon of antifreeze weigh?
1 gallon of ethylene glycol-based antifreeze is about 9.35 pounds.
How much do 2 gallons of antifreeze weigh?
2 gallons of ethylene glycol-based antifreeze is about 18.7 pounds.
How much do 3 gallons of antifreeze weigh?
3 gallons of ethylene glycol-based antifreeze is about 28.1 pounds.
How much do 4 gallons of antifreeze weigh?
4 gallons of ethylene glycol-based antifreeze is about 37.4 pounds.
How much do 5 gallons of antifreeze weigh?
5 gallons of ethylene glycol-based antifreeze is about 46.8 pounds.
How much do 6 gallons of antifreeze weigh?
6 gallons of ethylene glycol-based antifreeze is about 56.1 pounds.
How much do 7 gallons of antifreeze weigh?
7 gallons of ethylene glycol-based antifreeze is about 65.5 pounds.
How much do 8 gallons of antifreeze weigh?
8 gallons of ethylene glycol-based antifreeze is about 74.8 pounds.
How much do 9 gallons of antifreeze weigh?
9 gallons of ethylene glycol-based antifreeze is about 84.2 pounds.
How much do 10 gallons of antifreeze weigh?
10 gallons of ethylene glycol-based antifreeze is about 94 pounds.
How much do 20 gallons of antifreeze weigh?
20 gallons of ethylene glycol-based antifreeze is about 187 pounds.
How much do 30 gallons of antifreeze weigh?
30 gallons of ethylene glycol-based antifreeze is about 281 pounds.
How much do 40 gallons of antifreeze weigh?
40 gallons of ethylene glycol-based antifreeze is about 374 pounds.
How much do 42 gallons of antifreeze weigh?
42 gallons of ethylene glycol-based antifreeze is about 393 pounds.
How much do 50 gallons of antifreeze weigh?
50 gallons of ethylene glycol-based antifreeze is about 468 pounds.
How much do 55 gallons of antifreeze weigh?
55 gallons of ethylene glycol-based antifreeze is about 514 pounds.
How much do 60 gallons of antifreeze weigh?
60 gallons of ethylene glycol-based antifreeze is about 561 pounds.
How much do 70 gallons of antifreeze weigh?
70 gallons of ethylene glycol-based antifreeze is about 655 pounds.
How much do 80 gallons of antifreeze weigh?
80 gallons of ethylene glycol-based antifreeze is about 748 pounds.
How much do 90 gallons of antifreeze weigh?
90 gallons of ethylene glycol-based antifreeze is about 842 pounds.
How much do 100 gallons of antifreeze weigh?
100 gallons of ethylene glycol-based antifreeze is about 935 pounds.
How much do 200 gallons of antifreeze weigh?
200 gallons of ethylene glycol-based antifreeze is about 1870 pounds.
How much do 250 gallons of antifreeze weigh?
250 gallons of ethylene glycol-based antifreeze is about 2338 pounds.
How much do 300 gallons of antifreeze weigh?
300 gallons of ethylene glycol-based antifreeze is about 2805 pounds.
How much do 330 gallons of antifreeze weigh?
330 gallons of ethylene glycol-based antifreeze is about 3086 pounds.
How much do 400 gallons of antifreeze weigh?
400 gallons of ethylene glycol-based antifreeze is about 3740 pounds.
How much do 500 gallons of antifreeze weigh?
500 gallons of ethylene glycol-based antifreeze is about 4675 pounds.
References:
https://www.peterscars.com/what-is-antifreeze/
https://www.lubetech.com/turn-to-lube-tech-for-leading-water-based-fluids/
