fl oz

What is a US Fluid Ounce?

Volume Unit

Definition

A US fluid ounce is a unit of volume equal to 1/128 of a US gallon, approximately 29.57 milliliters.

History

The fluid ounce originated from the volume of one ounce of water. The US fluid ounce differs slightly from the imperial fluid ounce (28.41 mL).

Common Uses

  • Beverage nutrition labels
  • Medicine dosing
  • Cocktail recipes
  • Cosmetic and personal care products

Fun Facts

💡

A standard shot is about 1.5 fluid ounces

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A can of soda is typically 12 fluid ounces

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There are 8 fluid ounces in a cup

All US Fluid Ounce Conversions