# How Much Does a Gallon of Coolant Weight? [Weight Chart]

The average weight of automotive coolants is about 8.7-9 pounds per US gallons since the density of these liquids falls into the range of 1.04-1.08 g/ml. This is no surprise since most coolants are a 50:50 mixture of water (1 g/ml) and ethylene glycol-based antifreeze (1.12 g/ml).

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 coolant weight chart!

Contents

## What is Coolant?

Contrary to popular belief, coolant is not the same as antifreeze. Instead, coolant is a (typically 50:50) mixture of distilled water and antifreeze, which can be made of either propylene glycol or, more commonly, ethylene glycol.

Coolant is often sold as a prepaid mixture consisting of 50% distilled water and 50% antifreeze, or a concentrate that must be mixed with distilled water before use.

However, coolants formulated for extremely cold temperatures may contain 60% or 70% antifreeze.

## What is the Standard Weight for Coolant?

Based on our research, the density of most automotive coolants falls into a range of 1.04-1.08 g/ml, which translates into a weight of 8.7-9.0 pounds per US gallon.

Similar values are obtained by calculating the density of the mixture of water and ethylene glycol antifreeze.

As we’ve discussed, most automotive coolants are a 50:50 mixture of ethylene glycol-based antifreeze and distilled water:

• The density of ethylene glycol: 1.12 g/ml at 68°F
• The density of distilled water: 1 g/ml at 68°F

Calculation:

• (1.12/(100/50)) + (1/(100/50)) = 1.06 g/ml

Let’s do the same calculation for a 70:30 mixture:

• (1.12/(100/70)) + (1/(100/30)) = 1.08 g/ml

Based on the above, the average weight of one gallon of coolant at 68°F in various measurement units is as follows:

• 1 US gallon of coolant = ca. 8.7-9 pounds
• 1 US gallon of coolant = ca. 139.2-144 ounces
• 1 US gallon of coolant = ca. 3.95-4.1 kg
• 1 US gallon of coolant = ca. 3946-4082 grams

Note that these are just some hard numbers, as the exact weight of a coolant liquid depends on many factors like the chemical composition of the antifreeze, mixing ratio, and the temperature.

## Coolant Weight-per-Gallon Chart

For your convenience, we’ve compiled some of the most common conversion numbers into this coolant weight-per-gallon chart:

This is just for informational purposes only! Density may vary depending on the type, the manufacturer, and the temperature.

## FAQs About the Weight of Coolant

Coolant is typically a 50:50 mixture of water and antifreeze. However, certain coolants are formulated for extremely cold temperatures; these liquids often consist of 70% antifreeze and 30% water. The antifreeze used in coolants can be made of ethylene glycol or propylene glycol.

What’s the density of coolant?

The average density of coolant is about 1.04-1.08 g/ml, or 1040-1050 kg/m3.

How much does coolant weigh per gallon?

The weight of coolant is about 8.7-9 pounds per gallon.

Is coolant heavier than water?

Yes, coolant is heaver than water due to its higher density (1.04-1.08 > 1 g/ml).

Does coolant sink or float in water?

Due to its higher density, coolant sinks in water.

How much does 1 gallon of coolant weigh?

One gallon of coolant weighs about 8.7-9 pounds.

How much do 2 gallons of coolant weigh?

2 gallons of coolant weigh about 17.4-18 pounds.

How much do 3 gallons of coolant weigh?

3 gallons of coolant weigh about 26.1-27 pounds.

How much do 4 gallons of coolant weigh?

4 gallons of coolant weigh about 34.8-36 pounds.

How much do 5 gallons of coolant weigh?

5 gallons of coolant weigh about 43.5-45 pounds.

How much do 6 gallons of coolant weigh?

6 gallons of coolant weigh about 52.2-54 pounds.

How much do 7 gallons of coolant weigh?

7 gallons of coolant weigh about 60.9-63 pounds.

How much do 8 gallons of coolant weigh?

8 gallons of coolant weigh about 69.6-72 pounds.

How much do 9 gallons of coolant weigh?

9 gallons of coolant weigh about 78.3-81 pounds.

How much do 10 gallons of coolant weigh?

10 gallons of coolant weigh about 87-90 pounds.

How much do 20 gallons of coolant weigh?

20 gallons of coolant weigh about 174-180 pounds.

How much do 30 gallons of coolant weigh?

30 gallons of coolant weigh about 261-270 pounds.

How much do 40 gallons of coolant weigh?

40 gallons of coolant weigh about 348-360 pounds.

How much do 42 gallons of coolant weigh?

42 gallons of coolant weigh about 365-378 pounds.

How much do 50 gallons of coolant weigh?

50 gallons of coolant weigh about 435-450 pounds.

How much do 55 gallons of coolant weigh?

55 gallons of coolant weigh about 479-495 pounds.

How much do 60 gallons of coolant weigh?

60 gallons of coolant weigh about 522-540 pounds.

How much do 70 gallons of coolant weigh?

70 gallons of coolant weigh about 609-630 pounds.

How much do 80 gallons of coolant weigh?

80 gallons of coolant weigh about 696-720 pounds.

How much do 90 gallons of coolant weigh?

90 gallons of coolant weigh about 783-810 pounds.

How much do 100 gallons of coolant weigh?

100 gallons of coolant weigh about 870-900 pounds.

How much do 120 gallons of coolant weigh?

120 gallons of coolant weigh about 1044-1080 pounds.

How much do 150 gallons of coolant weigh?

150 gallons of coolant weigh about 1305-1350 pounds.

How much do 200 gallons of coolant weigh?

200 gallons of coolant weigh about 1740-1800 pounds.

How much do 250 gallons of coolant weigh?

250 gallons of coolant weigh about 2175-2250 pounds.

How much do 300 gallons of coolant weigh?

300 gallons of coolant weigh about 2610-2700 pounds.

How much do 330 gallons of coolant weigh?

330 gallons of coolant weigh about 2871-2970 pounds.

How much do 400 gallons of coolant weigh?

400 gallons of coolant weigh about 3480-3600 pounds.

How much do 500 gallons of coolant weigh?

500 gallons of coolant weigh about 4350-4500 pounds.

References:

https://www.peterscars.com/what-is-coolant/