Ounces to milliliters formula
mL = US fl oz × 29.5735295625
Multiply the number of US fluid ounces by 29.5735295625. That factor is exact: a US gallon is defined as 3.785411784 liters, and the fluid ounce is 1/128 of a gallon, so 3.785411784 ÷ 128 × 1,000 = 29.5735295625 milliliters. To go the other way, divide milliliters by 29.5735295625, or use the ml to oz converter.
Ounces to milliliters conversion table
The rows below are the marks that show up on a US cup and on packaged drinks: 8 fl oz is a US cup, 12 fl oz is a standard can, 16 fl oz is a US pint, 32 fl oz is a US quart and 128 fl oz is a US gallon. Values are rounded for reading. The converter above keeps full precision.
| US fluid ounces | Milliliters |
|---|---|
| 1 fl oz | 29.5735 mL |
| 2 fl oz | 59.1471 mL |
| 3 fl oz | 88.7206 mL |
| 4 fl oz | 118.294 mL |
| 5 fl oz | 147.868 mL |
| 6 fl oz | 177.441 mL |
| 8 fl oz | 236.588 mL |
| 10 fl oz | 295.735 mL |
| 12 fl oz | 354.882 mL |
| 16 fl oz | 473.176 mL |
| 20 fl oz | 591.471 mL |
| 24 fl oz | 709.765 mL |
| 32 fl oz | 946.353 mL |
| 64 fl oz | 1,892.71 mL |
| 128 fl oz | 3,785.41 mL |
Worked example
To convert 8 US fl oz to milliliters, multiply by 29.5735295625: 8 × 29.5735295625 = 236.5882365 mL. That is one US cup, and the table rounds it to 236.588 mL. A 12 fl oz can is 354.88235475 mL (354.882 mL rounded). A US pint is 16 × 29.5735295625 = 473.176473 mL, and a US quart is 32 fl oz = 946.352946 mL.
The same multiplication works for a partial ounce. A common US shot measure is 1.5 fl oz: 1.5 × 29.5735295625 = 44.36029434375 mL, which the converter rounds to 44.3603 mL. Enter 1.5 on the left if you want the live result.
Which ounce this page converts
Recipes, drinks and nutrition labels do not all mean the same ounce. Use this page when the ounce is a US fluid ounce. The result does not change with the liquid: water, milk and oil each occupy 29.5735295625 mL per US fluid ounce. They do not weigh the same, which is a separate question.
An avoirdupois ounce is a unit of mass equal to exactly 28.349523125 grams. It has no single milliliter value. Honey and flour measured by weight in ounces cannot be turned into milliliters until you know the density. For mass, open the oz to grams converter instead of treating a kitchen scale reading as a volume.
An Imperial fluid ounce is 28.4130625 mL, from the Imperial gallon of exactly 4.54609 liters divided into 160 fluid ounces. It is smaller than the US fluid ounce, so a UK recipe that says 8 fl oz is not 236.5882365 mL. The cooking measurement converter lists US and Imperial fluid ounces as different units, and cups to ml covers the US cup that equals these 8 fluid ounces.
US kitchen steps that follow from the same gallon are fixed volume identities, not ingredient averages: 1 US tablespoon = 0.5 fl oz = 14.78676478125 mL, 1 US cup = 8 fl oz, 1 US pint = 16 fl oz, 1 US quart = 32 fl oz and 1 US gallon = 128 fl oz = 3.785411784 L. If a label mixes fl oz with mL, prefer the printed milliliters when both are given; this factor is how those two declarations are meant to agree.
Frequently asked questions
How many milliliters are in one US fluid ounce?
One US fluid ounce equals exactly 29.5735295625 milliliters, because a US gallon is exactly 3.785411784 liters and a fluid ounce is 1/128 of that gallon. The conversion table rounds 1 fl oz to 29.5735 mL for reading. The converter keeps the full factor.
What is 8 oz in mL?
Eight US fluid ounces equal 236.5882365 milliliters, which is also one US cup. The table rounds that to 236.588 mL. A 12 fl oz can is 354.88235475 mL (354.882 mL rounded), and a US pint of 16 fl oz is 473.176473 mL.
Are ounces and fluid ounces the same when converting to milliliters?
No. A fluid ounce measures volume and converts directly to milliliters. An ounce used for body weight or packaged dry food measures mass: one avoirdupois ounce is exactly 28.349523125 grams. Grams become milliliters only when the density of the ingredient is known, so oz to mL and oz to grams are different conversions.
Is a US fluid ounce the same as a UK fluid ounce?
No. A US fluid ounce is 29.5735295625 mL. An Imperial fluid ounce, still used in many UK and older Commonwealth recipes, is 28.4130625 mL, about 4 percent smaller. American nutrition labels and US measuring cups use the US fluid ounce. A British recipe that says fl oz usually means the Imperial ounce.
How do I convert milliliters back to ounces?
Divide milliliters by 29.5735295625. One milliliter is 0.033814 US fluid ounces. You can also swap the units in the converter or open the milliliters to ounces page.
Related volume conversions
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