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US Fluid Ounce (fl oz)

The us fluid ounce is a unit of volume, used for beverage labeling, medicine dosing, cocktail recipes, and cosmetics. Its symbol is fl oz.

fl oz
-gal

1 us fluid ounce equals

US Gallons0.0078125 gal
Liters0.0295735 L
Milliliters29.5735 mL
US Cups0.125 cup

About the us fluid ounce

The fluid ounce originated in the apothecary system. The US fluid ounce (29.57 mL) is slightly larger than the Imperial fluid ounce (28.41 mL).

In everyday use the us fluid ounce appears in beverage labeling, medicine dosing, cocktail recipes, and cosmetics. As a point of reference: a standard shot glass holds 1.5 US fluid ounces.

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