US fluid ounces to Milliliters Converter
Convert US fluid ounces (fl oz) to Milliliters (mL) instantly, or use the conversion table below to look up common values.
US fluid ounces to Milliliters conversion table
| US fluid ounces (fl oz) | Milliliters (mL) |
|---|---|
| 1 | 29.57353 |
| 2 | 59.147059 |
| 3 | 88.720589 |
| 4 | 118.294118 |
| 5 | 147.867648 |
| 10 | 295.735296 |
| 25 | 739.338239 |
| 50 | 1,478.676478 |
| 100 | 2,957.352956 |
How to convert US fluid ounces to Milliliters
1 fl oz equals 29.57353 mL. Use the converter above for any value, or read the table for common conversions.
mL = fl oz × 29.5735295625 · fl oz = mL × 0.033814022701843Multiply a us fluid ounces figure by 29.57353 to get milliliters, or divide it by 0.033814 to go the other way.
Worked examples
- 1 fl oz= 29.57353 mL
- 2 fl oz= 59.147059 mL
- 5 fl oz= 147.867648 mL
- 10 fl oz= 295.735296 mL
- 20 fl oz= 591.470591 mL
What these units are
US fluid ounces (fl oz). A US fluid ounce is 29.5735295625 milliliters, one sixteenth of a US pint. It is used for drinks, spirits and recipe measures in the United States.
Milliliters (mL). A milliliter is one thousandth of a liter, and exactly the same volume as one cubic centimeter. It is used for drinks, medicine doses and recipe quantities.
US and imperial units are kept separate because they are genuinely different sizes. Confirm which system a source means before trusting a converted figure.
Converting US fluid ounces to Milliliters in practice
Working in us fluid ounces
A US fluid ounce is exactly 29.5735295625 milliliters, one 128th of a US gallon. It measures liquid volume and is not the same as the ounce of mass.
Beverage bottles, cocktail recipes, medicine cups, infant formula and cosmetic containers are labelled in US fluid ounces in the United States, and bar measures follow the same unit.
The US fluid ounce is exactly 1/128 of a US gallon, while the imperial fluid ounce is exactly 28.4130625 milliliters. This site uses the US fluid ounce throughout, and printed results are rounded, so a round trip can change the final digit.
The classic error is reading a fluid ounce as a weight ounce, so a 12-fluid-ounce bottle is not 12 ounces of mass. Using an imperial fluid ounce in a US recipe also differs by about four percent.
The US fluid ounce works with US cups and gallons, while milliliters and liters work with metric measures. A drink recipe that mixes them needs every quantity converted, and the fluid ounce should not be swapped for the ounce of mass.
Reading the result in milliliters
A milliliter is one thousandth of a liter, exactly one cubic centimeter, or 0.000001 cubic meters. It is the small metric unit for liquid and dose volumes.
Medicine doses, laboratory samples, cosmetics, flavorings and small bottles of liquid are measured in milliliters. Syringes, measuring spoons and dosing cups are graduated in milliliters. Beverage cans and bottles often carry the volume on the label.
Milliliters to liters is a division by 1,000 exactly, and milliliters to cubic centimeters is a one-to-one identity. The fluid ounce is exactly 1/128 of a US gallon, and printed results are rounded, so a return conversion can differ in the final digit.
The mistake is treating a milliliter as a drop or a spoonful; a metric teaspoon holds five milliliters and a tablespoon fifteen. This site uses the US fluid ounce, not the imperial one, when converting small volumes.
Milliliters suit small quantities, liters suit bottles and fuel, and US cups and fluid ounces serve recipes written on the other scale. A 240-milliliter measure is the US legal cup, while a metric cup of 250 milliliters is a different unit.
Checking a us fluid ounces to milliliters conversion
The metric volume units are a clean decimal chain around the liter, so liters to milliliters is a shift of three places and cubic meters to liters is a shift of three the other way. Those pairs a reader can do without a converter.
Every pair that names a US or imperial liquid unit has to go through the definition first, because three of these units differ from a metric unit by amounts too large to round away: a liter is not a quart, a gallon is 3.785411784 liters in the US system and 4.54609 in the imperial one, and a US fluid ounce is not an imperial fluid ounce.
When checking a volume conversion, convert into liters and out again, or measure the container. The mistake that survives every other check is reading a US measure as the imperial unit of the same name, which changes a recipe, a fuel figure or a tank size by about a fifth.
Tanzania reference points
Real quantities, converted into the units on this page.
The 20-litre bucket or canister used to carry water in Tanzania
20 L = 676.280454 fl oz = 20,000 mL
WaterAid puts the minimum daily water need per person at 20 litres, so one container is roughly one person's daily requirement.
Source: IPS News — water access in Tanzania, citing WaterAid · verified 2026-09-14
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