Milliliters to US fluid ounces formula
US fl oz = mL ÷ 29.5735295625
Divide milliliters by 29.5735295625, the exact number of milliliters in one US fluid ounce. Multiplying by about 0.0338140227 is the same step. The table rounds those results for reading, and the converter keeps the stored factor. To go the other way, multiply US fluid ounces by 29.5735295625, or use the fluid ounces to ml converter.
Milliliters to US fluid ounces conversion table
Common ml to oz values, rounded for reading. The converter above keeps full precision.
| Milliliters | US fluid ounces |
|---|---|
| 1 mL | 0.033814 fl oz |
| 5 mL | 0.16907 fl oz |
| 10 mL | 0.33814 fl oz |
| 15 mL | 0.50721 fl oz |
| 20 mL | 0.67628 fl oz |
| 25 mL | 0.845351 fl oz |
| 30 mL | 1.01442 fl oz |
| 50 mL | 1.6907 fl oz |
| 75 mL | 2.53605 fl oz |
| 100 mL | 3.3814 fl oz |
| 150 mL | 5.0721 fl oz |
| 200 mL | 6.7628 fl oz |
| 250 mL | 8.45351 fl oz |
| 500 mL | 16.907 fl oz |
| 750 mL | 25.3605 fl oz |
| 1,000 mL | 33.814 fl oz |
Worked example
To convert 100 mL to US fluid ounces, divide by the defined size of one US fluid ounce: 100 ÷ 29.5735295625. The displayed result is 3.3814 fl oz. Multiplying 100 by 0.033814 reaches that same displayed result. A 750 mL bottle converts to 25.3605 fl oz, which is the usual comparison with a standard wine bottle.
The US fluid ounce this conversion uses
A milliliter is one thousandth of a liter. A US fluid ounce is one one-hundred-twenty-eighth of a US gallon. This converter uses the international gallon of exactly 3.785411784 liters, so one US fluid ounce is exactly 3.785411784 ÷ 128 = 0.0295735295625 liters, or 29.5735295625 milliliters. Dividing 1 by 29.5735295625 gives the multiplier 0.033814. That multiplication and the division in the formula are the same step. The calculator keeps the stored factor; the table rounds it for reading.
Recipes often treat 30 mL as one fluid ounce. Under the definition above, 30 mL is 1.01442 US fl oz, so the shortcut is close for home cooking and a little high for a label that needs the standard value. Fifteen milliliters is 0.50721 US fl oz, not a neat half ounce. Use the table when the shortcut is not precise enough.
US fluid ounces, Imperial fluid ounces and weight ounces
An Imperial fluid ounce is 28.4130625 milliliters. A US fluid ounce is 29.5735295625 milliliters, so the US unit is larger. Using one factor for the other shifts the result by about four percent. This page converts US fluid ounces only. If a method says Imperial, UK or imp fl oz, do not apply this US factor.
A fluid ounce measures volume. An ounce on a scale measures mass. The avoirdupois ounce is 28.349523125 grams, and the same volume of water, milk or oil does not weigh the same. Milliliters cannot become weight ounces without a density, so this page stays with liquid volume. For grams and ounces of mass, use the weight converter. For liters, cups, pints and gallons, use the volume converter.
Bottle and carton checkpoints
A 250 mL carton is 8.45351 US fl oz. A 500 mL bottle is 16.907 US fl oz. A 750 mL bottle is 25.3605 US fl oz. One liter, 1,000 mL, is 33.814 US fl oz. Those checkpoints match the conversion table. To convert US fluid ounces back to milliliters, open the fluid ounces to ml converter or swap the units in the form above.
Frequently asked questions
How many US fluid ounces are in one milliliter?
One milliliter equals 0.033814 US fluid ounces (1 mL = 0.033814 fl oz). One US fluid ounce is exactly 29.5735295625 milliliters, so the multiplier is 1 ÷ 29.5735295625.
How do you convert milliliters to US fluid ounces?
Multiply the milliliter value by 0.033814, or divide it by 29.5735295625. Both follow from a US gallon of exactly 3.785411784 liters and 128 US fluid ounces in that gallon. Either field in the converter runs the same calculation.
What is 100 mL in US fluid ounces?
100 mL equals 3.3814 US fl oz. Divide 100 by 29.5735295625 for the unrounded value. The conversion table rounds common amounts for reading, and the converter above keeps the stored factor.
Is a US fluid ounce the same as an Imperial fluid ounce?
No. One US fluid ounce is 29.5735295625 milliliters. One Imperial fluid ounce is 28.4130625 milliliters. This page uses the US size only. A recipe marked Imperial, UK or imp fl oz needs the Imperial unit, not this result.
Is a fluid ounce the same as an ounce on a scale?
No. A fluid ounce measures volume. An ounce on a kitchen scale is usually the avoirdupois ounce, a unit of mass equal to 28.349523125 grams. Turning milliliters into weight ounces also needs the ingredient's density, so this converter stays with liquid volume.
Related volume conversions
Need a different pair? Open the full volume converter to choose any two units.