Fluid Ounces to Milliliters
Convert us fluid ounce to milliliter instantly — type a value and read the result, with the exact formula shown.
Example
1 fl oz = 29.57353 mL, 5 fl oz = 147.8676 mL, 10 fl oz = 295.7353 mL.
How it works
Milliliter = US fluid ounce × 29.57353. Every value is converted through a single liter base unit using internationally defined conversion factors, so any from/to pair stays consistent.
Good to know
Converting US fluid ounces to milliliters is something home cooks, bartenders, and parents do constantly: a recipe written for an American audience lists "8 fl oz of stock," but your measuring jug, baby bottle, or medicine syringe is marked in milliliters. The same swap shows up when you read a US drink label (a 12 fl oz soda is 355 mL) or scale a cocktail recipe up for a party.
The two units come from different measurement worlds. The fluid ounce is part of the US customary system inherited from British imperial units, while the milliliter is purely metric and equal to exactly one cubic centimeter. Because they were never designed to line up, the bridge between them is the slightly awkward factor 29.57353 mL per US fluid ounce.
For quick mental math, treat 1 fl oz as roughly 30 mL — that is only about 1.4% high, so 8 fl oz lands near 240 mL (the real figure is 236.6 mL). A handy anchor: a US "cup" is 8 fl oz, which is why metric kitchens often round it to 240 mL or 250 mL.
The classic mistake is mixing up the two definitions of a fluid ounce. The US fluid ounce used here is 29.57353 mL, but the UK (imperial) fluid ounce is 28.41306 mL — about 4% smaller. A British recipe's "10 fl oz" is 284 mL, not 296 mL, so always confirm which side of the Atlantic your source is from before you pour.
Frequently asked questions
How do you convert us fluid ounce to milliliter?
Multiply the number of us fluid ounces by 29.57353 to get milliliters. For example, 1 fl oz = 29.57353 mL.
What is 1 us fluid ounce in milliliters?
1 us fluid ounce equals 29.57353 milliliters (1 fl oz = 29.57353 mL).
How many us fluid ounces are in 1 milliliter?
There are 0.03381402 us fluid ounces in 1 milliliter.
Is this converter free and private?
Yes. It runs entirely in your browser, so your inputs never leave your device, there is no sign-up, and it works offline once loaded.
Are the conversions exact?
Conversions use internationally defined factors and are exact where the definitions are exact (for example, 1 inch = 2.54 cm). Displayed results are rounded for readability.
People also ask
How many mL is 8 fluid ounces?
8 US fluid ounces equal about 236.6 mL (8 × 29.57353). Rounded up, this is the 240 mL often printed as one metric cup.
Is a fluid ounce exactly 30 mL?
No, but it's close. One US fluid ounce is 29.57353 mL, so 30 mL is a convenient rounding that runs about 1.4% high.
What is the difference between a US and UK fluid ounce in mL?
A US fluid ounce is 29.57353 mL, while a UK (imperial) fluid ounce is 28.41306 mL. The UK ounce is roughly 4% smaller, so the same number of ounces gives a smaller metric volume.
How do I convert 12 fl oz to mL?
Multiply 12 by 29.57353 to get about 354.9 mL. That's why a standard 12 fl oz US can is labeled 355 mL.
How many mL is a shot of liquor?
A standard US shot is 1.5 fl oz, which is about 44.4 mL (1.5 × 29.57353). A single 1 fl oz pour is roughly 29.6 mL.
How many fluid ounces are in 500 mL?
500 mL is about 16.9 US fluid ounces (500 × 0.03381402). That's why many water bottles labeled 500 mL are marketed as roughly 17 oz.
Why isn't 1 oz of water the same as 1 mL?
They measure different things: a fluid ounce is a volume from the US customary system, while a milliliter is a metric volume equal to one cubic centimeter. One US fluid ounce of any liquid occupies 29.57353 mL regardless of weight.
Are fluid ounces and weight ounces the same?
No. A fluid ounce measures volume (29.57353 mL), while an ounce on a kitchen scale measures weight (about 28.35 grams). They only roughly coincide for water and shouldn't be used interchangeably for other ingredients.
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