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Life is everything. Let's make it a healthy one!

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Life is everything. Let's make it a healthy one!

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# What Is Specific Gravity? How Do You Measure It?

Specific gravity is also called relative density.

It’s used to define the weight or density of a substance as compared to the density of an equal volume of a reference substance at a specified temperature.

Specific gravity for liquids is almost always measured with a reference point to water with the temperature at 4 °C or 39.2 °F.

Specific gravity for gases is almost always measured in reference to air at a room temperature of 20 °C or 68 °F.

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## Specific Gravity Is A Measurement

Specific gravity is the ratio of the density of a substance to the density of a reference substance. (source )

In most of the cases the reference substance is water for liquids or air for gases. Specific gravity represents a ratio and is therefore dimensionless. (source )

## How To Measure Specific Gravity

We can use specific gravity to determine the density of the substance.

The density of liquid water is 0.997, so if we weigh a cup of water and then weigh the cup of water after we have added a substance, we can determine the density of the water by using the formula:

weight of water – weight of water + substance

## Specific Gravity For Solids And Liquids

Specific gravity is a measure of the density of a substance, which is useful for distinguishing between a solid and a liquid.

The more dense a substance, the more solid it is.

Water is the most dense liquid known. We know that water has a specific gravity of 1.000.

Dense substances have a specific gravity of 1.000 or more. So dense substances are called solids, and substances that are less dense are called liquids.

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## Foods You Can Measure With Specific Gravity

We only have one food in our tool that has a measurement for it

### Foods in our nutrition tool

You can find regularly updated, top ranked lists of foods for over 200+ nutrients in our nutrition tool.

We currently have just a few foods in our nutrition tool that measure specific gravity.

Here's our short list of foods that measure Specific Gravity.

co-founder Care Omnia, Head Content Creator

Sara
Niemelä

Nutrition is my passion. I've spent thousands upon thousands of hours reading, analyzing, categorizing and comparing research studies.

I’m a wife and a mother of three. I enjoy the outdoors, cooking, and spending time with my family.