What Is the Abbreviation of Ounce?

Whether you love cooking or you are trying to pack your bag for a trip and are wondering whether you will be able to get your shampoo through security, you probably have wondered what the abbreviation of ounce is. In this article, we will review the definitions and abbreviations of ounce in this article.

Definition of Ounce

An ounce is a noun and defined as any of the following:

  1. A unit of weight equal to approximately 28.35 grams. As a unit of weight, the ounce originates from the word uncia, which was 1/12 of a Roman foot or ounce. The words meaning was “twelfth part”.
  2. A unit of 480 grains, the apothecaries’ commonly used weight.
  3. A fluid ounce. As a unit of volume, the fluid ounce is equal to 1/16 of a pint.
  4. A very small amount of something, also including an intangible idea such as “an ounce of bravery”.

How Do You Abbreviate the Word Ounce?

Ounce abbreviation is written as:

  • oz
  • oz.
  • OZ
  • OZ.
  • Oz.

It is written the same rather the word is used in the singular or in the plural form.

The abbreviation “oz” is derived from the similarly originated Italian word onza (singular) and onze (plural), now spelled oncia, which was a gold coin minted between 1732 and 1860.

Synonyms for the Word Ounce

Some words that may be substituted for the word ounce are as follows:

bit, hint, little, mite, nip, particle, smidgen, speck, splash, sprinkling, tad, trace

It should be noted that the above words are most commonly synonyms for use in regards to the non-tangible definition.

Ounce may be abbreviated as oz or oz. synonymously. Both abbreviations are used with a space between the abbreviation and the previous word or number, such as “He has five oz of grain.” or “She had a total of 25 oz.”

The troy ounce (approximately 31 grams) is used when dealing with the weight of precious metals such as gold and silver.

The ounce-force is a measure of force, based on 1 ounce under the force of standard gravity.

The fluid ounce is a measure of volume equal to 1/16th of a pint.

When to Use the Abbreviation

Ounce abbreviation is often used to condense the words ‘ounce’ or ‘ounces’. For example, a sentence using the singular form may be written as “He had an oz of tea leaves remaining for the entire week.”

While it is important to know when to use the abbreviation for ounce it is also important to know when it is not commonly used, as in the following example. “She had only an ounce of willpower left, but she made sure to use it.” It is not as common to use the abbreviation for the variant of ounce that does not involve tangible weight or volume.

Examples of Sentences Using the Abbreviation

“He only had three oz of steak but he savored every bite.”

“She has one oz of water in her beaker, but another 48 oz in her reservoir.”

“When they go to the store, they are going to get several oz of seasoning for the meat.”

“After completing the science experiment she had 18 oz of sediment to use for further testing.”

“Given an oz of milk, the baby rabbit began to show more vigor.”

“He bought an oz. of gold.”

Are Fluid Ounces and Ounces?

When a recipe calls for ounces, it typically refers to “dry ounces” which measure weight. There are 16 ounces in a pound.

Fluid ounces are a measure of volume and 8 ounces equal a cup.

Fun fact – a cup of water happens to equal both 8 fluid ounces (in volume) and 8 ounces (in weight).


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