Oz to ML Converter

Use this free oz to ml converter to change fluid ounces to milliliters. Type an amount in the Ounces box and the milliliters appear as you type (1 US fluid ounce is 29.5735 ml, and 8 fl oz is 236.5882 ml). Type in the Milliliters box to go the other way, from ml to oz. Pick US or UK fluid ounces, because the two are not the same size. The answer also shows tablespoons and cups, and you can pick how many decimals to round to and copy a link to your conversion. Tables list a chart from 0.5 to 64 fl oz, the amounts people look up most, milliliters in ounces, bottle and label sizes such as 3.4 oz and 16.9 oz, and the US kitchen measures. It is free and instant, and your numbers stay in your browser. It is not for medicine doses.

How to convert oz to ml

Multiply the US fluid ounces by 29.5735. One US fluid ounce is exactly 29.5735295625 milliliters, which is rounded to 29.5735 on this page.

For 8 fl oz: 8 × 29.5735 = 236.5882 ml. For 16 fl oz: 16 × 29.5735 = 473.1765 ml. For 1 fl oz: 29.5735 ml. To go back, divide by 29.5735: fl oz = ml ÷ 29.5735.

How many ml are in an oz

There are 29.5735 ml in a US fluid ounce and 28.4131 ml in a UK (Imperial) fluid ounce. Both are exact by definition: the US fluid ounce is 1/128 of a US gallon (3.785411784 liters), and the UK fluid ounce is 1/160 of an Imperial gallon (4.54609 liters). One milliliter is 0.033814 US fluid ounces, rounded.

Fluid ounce or ounce?

A fluid ounce (fl oz) measures volume, how much space a liquid takes up. An ounce (oz) on a scale measures weight, and one ounce of weight is 28.3495 grams. They are different units that happen to share a name. When a drink, a bottle or a recipe says "oz" for a liquid, it means the fluid ounce, and this converter is for those. Water is the one case where they come close: 1 US fluid ounce of water weighs about 29.6 grams.

US and UK fluid ounces

The UK fluid ounce is about 4% smaller than the US one: 28.4131 ml against 29.5735 ml. For most everyday liquids, such as a can of drink or a recipe, the US ounce is the one to use when the source is American. Use the UK button above for a British or Commonwealth source. On US nutrition labels, one fluid ounce is rounded to 30 ml for serving sizes.

ML to oz

To change milliliters to ounces, divide by 29.5735 (US) or 28.4131 (UK). 500 ml is 16.907 US fluid ounces, 100 ml is 3.3814, 250 ml is 8.4535 and 750 ml is 25.3605. You can do it here by typing in the Milliliters box.

Common conversions

1 fl oz is 29.5735 ml, 2 fl oz is 59.1471 ml, 4 fl oz is 118.2941 ml, 8 fl oz is 236.5882 ml, 12 fl oz is 354.8824 ml, 16 fl oz is 473.1765 ml, 24 fl oz is 709.7647 ml and 32 fl oz is 946.3529 ml. The chart above lists more.

Bottle and travel sizes

Bottles are often labeled in both ounces and ml, and the label is rounded. A 3.4 fl oz bottle holds 100.55 ml, a 1.7 fl oz bottle holds 50.275 ml, a 16.9 fl oz bottle holds 499.8 ml and a 33.8 fl oz bottle holds 999.6 ml, which are sold as 100 ml, 50 ml, 500 ml and 1 liter.

Other volume units

For cups, tablespoons, teaspoons, pints, quarts, gallons and liters, use the Volume Converter. This page is for ounces and milliliters only, and is not for medicine doses.

Spelling

You may see oz, fl oz or ounce, and ml, mL, milliliter or millilitre. This page works for all of them, and for "8oz" typed without a space.