Milliliters To Ounces Calculator
A recipe calls for 250 milliliters and your measuring cup is marked in ounces. Or a US label says 12 fl oz and you need milliliters. The conversion is simple division, but the trap is which ounce you mean: the US fluid ounce (29.5735 ml) and the UK imperial fluid ounce (28.4131 ml) differ by about 4 percent, enough to throw off baking and product labeling.
The converter below works in both directions and in both ounce systems, so US recipes and UK recipes each get the right factor. Every result also shows cups, tablespoons, teaspoons, pints, and liters.
Pick a direction and an ounce system, enter a value, and convert.
How to use the milliliters to ounces converter
Choose the direction: milliliters to ounces, or ounces to milliliters. Then choose the ounce system: US fluid ounces for American recipes and labels, UK imperial fluid ounces for British recipes. Enter the value and convert. The result table shows the answer plus cups, tablespoons, teaspoons, pints, and liters.
Conversion formulas
Milliliters to US fluid ounces: US fl oz = milliliters / 29.5735295625
US fluid ounces to milliliters: milliliters = US fl oz x 29.5735295625
Milliliters to UK fluid ounces: UK fl oz = milliliters / 28.4130625
UK fluid ounces to milliliters: milliliters = UK fl oz x 28.4130625
Kitchen equivalents used in the result table: 1 US cup = 8 fl oz, 1 tablespoon = 2 fl oz, 1 teaspoon = 6 fl oz, 1 pint = 16 fl oz, 1 liter = 1,000 ml.
US vs UK fluid ounces
The US fluid ounce is defined as exactly 29.5735295625 milliliters. The UK imperial fluid ounce is 28.4130625 milliliters. The UK ounce is about 4 percent smaller, so the same milliliter value converts to a slightly larger number of UK ounces. Using the wrong one in baking changes liquid ratios enough to matter: 250 ml is 8.45 US fl oz but 8.80 UK fl oz.
Worked examples
250 ml to US ounces: 250 / 29.5735295625 = 8.4535 US fl oz, about 1.06 cups.
250 ml to UK ounces: 250 / 28.4130625 = 8.7988 UK fl oz.
8 US fl oz to ml: 8 x 29.5735295625 = 236.5882 ml, exactly one US cup.
750 ml (a standard wine bottle): 25.3605 US fl oz or 26.3963 UK fl oz.
All four examples were verified against the converter above.
Common conversions
Values people search for most: 50 ml = 1.6907 US fl oz; 100 ml = 3.3814 US fl oz; 200 ml = 6.7628 US fl oz; 500 ml = 16.9070 US fl oz; 1 liter = 33.8140 US fl oz. In reverse: 1 US fl oz = 29.5735 ml; 3.4 fl oz (the TSA travel limit) = 100.5497 ml; 12 fl oz (a standard soda can) = 354.8824 ml; 16 fl oz (a US pint) = 473.1765 ml.
Fluid ounces vs weight ounces
A fluid ounce measures volume; a weight ounce measures mass. They are not interchangeable except for water, where 1 ml weighs about 1 gram. A fluid ounce of flour weighs far less than a fluid ounce of honey. This converter handles volume only. For weight conversions you need the ingredient's density.
What competitors miss
Most converters quietly assume US ounces and never mention the UK system, so a British recipe converted with a US factor comes out 4 percent off with no warning. The richest competing pages explain the difference in prose but their tools still only do US. This converter puts the US/UK choice in the tool itself, works both directions, and adds the kitchen units (cups, tablespoons, teaspoons) that recipes actually use, plus copy and share buttons.
Frequently asked questions
Is 250 ml the same as 8 oz?
No. 250 ml equals 8.4535 US fl oz, about half an ounce more. 8 US fl oz is exactly 236.5882 ml, one US cup.
Is 1 ounce the same as 30 ml?
Close but not exact: 1 US fl oz = 29.5735 ml, and 30 ml = 1.0144 US fl oz. The 30 ml shortcut is fine for rough kitchen estimates, not for medicine or precise baking.
How many ml are in 1 oz?
1 US fluid ounce = 29.5735 ml. 1 UK imperial fluid ounce = 28.4131 ml.
What is the difference between US and UK fluid ounces?
The US fluid ounce (29.5735 ml) is larger than the UK imperial fluid ounce (28.4131 ml). The same volume reads about 4 percent higher in UK ounces.
Can I use this for liquid medication?
The math is exact, but dosing should always follow the prescriber's instructions in milliliters. Never round a converted dose without checking with a pharmacist.
Why do UK and US recipes differ?
The two countries standardized the fluid ounce differently, and the tablespoon and pint differ too (a UK pint is 568 ml vs 473 ml in the US). When converting a recipe, convert every liquid measure with the matching system.