Milliliters to Fluid Ounces Converter

About the ml to fl oz calculation

One milliliter is exactly 0.033814 fluid ounces, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The everyday unit for drinks, medicine doses and recipe liquids. The US fluid ounce. Measures volume, not weight — quite separate from the ounce.

Formula

fl oz = ml × 0.033814

1 ml = 0.033814 fl oz
1 fl oz = 29.5735 ml

Worked example

To convert 500 ml, multiply by 0.033814: 500 × 0.033814 = 16.907 fl oz.

Frequently asked questions

How many fluid ounces are in a milliliter?

There are 0.033814 fluid ounces in one milliliter. To convert any amount, multiply the number of milliliters by 0.033814.

How do I convert fluid ounces back to milliliters?

Divide instead of multiplying, or equivalently multiply by 29.5735. One fluid ounce is 29.5735 milliliters.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between milliliters and fluid ounces is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.

Where is each of these units used?

Milliliters: the everyday unit for drinks, medicine doses and recipe liquids. Fluid Ounces: the US fluid ounce. Measures volume, not weight — quite separate from the ounce.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units