Fluid Oz to mL Converter: Complete Guide to Converting Fluid Ounces to Milliliters
Converting fluid ounces to milliliters is one of the most common volume conversions in cooking, nutrition, medicine, and cosmetics. US recipes list liquids in fluid ounces; European and scientific contexts use milliliters. A can of soda is 12 fl oz = 354.88 ml. A standard shot is 1.5 fl oz = 44.36 ml. A US cup is 8 fl oz = 236.59 ml. Whether you're scaling a cocktail recipe, reading a supplement label, or comparing beverage sizes across borders, this converter gives you instant precision.
The Exact Relationship: 1 fl oz = 29.5735 ml
The US fluid ounce is defined as exactly 29.5735295625 milliliters (often rounded to 29.5735 ml). This is a US customary unit, different from the imperial fluid ounce (28.4131 ml) used in the UK. Always specify US or imperial when precision matters. The formula is: ml = fl oz × 29.5735.
1 UK fl oz = 28.4131 ml (imperial)
Formula: ml = fl oz × 29.5735
Reverse: fl oz = ml ÷ 29.5735
Quick references:
1 fl oz = 29.57 ml
4 fl oz = 118.29 ml
8 fl oz = 236.59 ml (1 cup)
16 fl oz = 473.18 ml (1 pint)
32 fl oz = 946.35 ml (~1 liter)
128 fl oz = 3,785.41 ml (1 gallon)
Cooking and Baking
US cookbooks measure liquids in cups, tablespoons, teaspoons, and fluid ounces. A recipe calling for 1 cup = 8 fl oz = 236.59 ml. A tablespoon = 0.5 fl oz = 14.79 ml; a teaspoon = 1/6 fl oz = 4.93 ml. When scaling a cocktail or batch recipe from US to metric, converting each fluid ounce measure into milliliters is essential. A 12 fl oz beer bottle = 354.88 ml; a standard wine glass pour of 5 fl oz = 147.87 ml.
Nutrition and Medicine
US supplement labels list serving sizes in fl oz; European labels use ml. A 1 fl oz serving of liquid vitamin = 29.57 ml. Pediatric medicine doses in the US are often given as "1 fl oz = 30 ml" (rounded). An 8 fl oz glass of water is the standard "one cup" = 236.59 ml, used in daily hydration guidelines. Sports drinks are typically 20 fl oz = 591.47 ml.
Cosmetics and Personal Care
Cosmetic products sold in the US list volume in fl oz; EU products use ml. A 3.4 fl oz bottle = 100.55 ml — the exact limit for liquids in airline carry-on bags worldwide. A 1 fl oz sample bottle = 29.57 ml. An 8 fl oz shampoo bottle = 236.59 ml. TSA's "3-1-1 rule" references 3.4 fl oz (100 ml) precisely because of this conversion.
How to Use This Converter
Enter any fluid ounce value to see milliliters instantly. The animated liquid scale shows both sides filling with liquid as you enter values. The pour visualizer shows liquid flowing from an ounce vessel into a milliliter beaker. The glass fill animator shows how full a shot glass, cup, and pint become. All units appear simultaneously: ml, liters, tablespoons, teaspoons, and cups.