How many milliliters are in 1 US fluid ounce?

1 US fluid ounce equals 29.5735 mL.

How do I convert milliliters back to US fluid ounces?

Use the reverse converter: 1 milliliter equals 0.033814 US fl oz.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert US fluid ounces to milliliters, multiply the value by 29.5735296.

mL = US fl oz × 29.5735296

40 US fl oz × 29.5735296 = 1182.94 mL

Note: "cup" here means the US cup (about 236.6 mL). Metric cups (250 mL), imperial cups and US/UK fluid ounces are listed as separate units.

US Fluid Ounce (US fl oz): A US liquid measure of about 29.5735 mL, one sixteenth of a US pint.
Milliliter (mL): Used for liquids, medicine and recipes in metric countries. One thousandth of a litre, equal to one cubic centimetre.

How do I convert US fluid ounces to milliliters?: To convert US fluid ounces to milliliters, multiply the value by 29.5735296.
How many milliliters are in 1 US fluid ounce?: 1 US fluid ounce equals 29.5735 mL.
How many milliliters are in 10 US fluid ounces?: 10 US fl oz equals 295.735 mL.
How do I convert milliliters back to US fluid ounces?: Use the reverse converter: 1 milliliter equals 0.033814 US fl oz.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.