Measuring Jelly: Fluid Ounces vs. Net Weight Ounces

We all know that measurements can be a pain. And, if you’re like most people, dimensional details such as the height, diameter, weight and mass of a bottle measured in cm, in, mm, oz or gram simply confuse you.

When searching out packaging for jelly, dimensions become even more confusing. Because now you’re suddenly dealing with two measurements for one and the same bottle!

So today we’ll shed some light on the mystery with an insightful article that will make jelly packaging seem a whole lot simpler…

Let’s start out with our Hexagonal Glass Jars as an example.

As you can see, this item is listed as having a 9 oz capacity, but it holds 12 oz of jelly. There you have it: two separate measurements for one container. This doesn’t make sense to most people.

The key to understanding, is to become familiar with two of the most commonly used types of ounces: fluid and net weight. In our Hexagonal Jar example, the first measurement of 9 oz is given in fluid ounces (FL. OZ.). The second measurement of 12 oz reflects the net weight ounces
(NET WT. OZ.), the standard by which jelly is typically measured and sold.

Fluid ounces are the form of measurement that determines how many ounces of liquid a bottle or jar will hold. This unit measures the liquid volume capacity of containers, like you would expect from a beverage or shampoo container.

Net weight ounces do not consider volume estimates. Instead, this number refers to the mass or weight of the product inside the jar. Like jelly, other cooking materials like powders and spices are also measured in net weight ounces.

Unfortunately there is no secret formula to determine fluid ounce to net weight ounce. That would be far too simple. However, all you need to know is that the Hexagonal Jar doesn’t actually hold more jelly than it is described to hold, the contents are merely measured in a different way.

Speaking of Hexagonal Jars, now that you understand how their contents are measured, they do make a perfect addition to anyone’s jelly product line! And, if Hexagonal Jars aren’t your style, we also carry other glass jar options in various shapes and sizes.

Be sure to check out our Hexagonal Jar family or our Round Glass Jar options at www.ebottles.com for your jelly canning needs.