Volume conversion
US fluid ounce to Milliliter converter
Convert fl oz to mL instantly, choose the displayed precision, and verify the result with the formula and reference table below.
Milliliter (mL)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Practical context
Understanding this conversion
US fluid ounces are used on American drink, personal-care, cooking, and medicine containers. Milliliters are more widely used internationally and make small metric volumes easy to compare.
Check whether the source specifies US or Imperial fluid ounces. They share a name but differ by about four percent, which can matter in scaled recipes and precise dosing.
Reviewed August 16, 2026.
Calculation
US fluid ounce to Milliliter formula
mL = fl oz × 29.57353
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 fl oz, the result is 295.735296 mL. Substitute 10 fl oz into the formula to obtain 295.735296 mL.
A numerical value expressed in milliliter is usually larger than the same measurement expressed in us fluid ounce, because 1 fl oz equals 29.57353 mL.
US fluid ounce to Milliliter reference table
Common values rounded to a maximum of 6 decimal places.
| US fluid ounce (fl oz) | Milliliter (mL) |
|---|---|
| 1 fl oz | 29.57353 mL |
| 5 fl oz | 147.867648 mL |
| 10 fl oz | 295.735296 mL |
| 50 fl oz | 1,478.676478 mL |
| 100 fl oz | 2,957.352956 mL |
Understanding the units
About US fluid ounce and Milliliter
US fluid ounce (fl oz)
One us fluid ounce (fl oz) equals 0.02957353 L, the base relationship used for this volume conversion.
Milliliter (mL)
One milliliter (mL) equals 0.001 L, the base relationship used for this volume conversion.
When this conversion is useful
US fluid ounce to Milliliter conversion is useful for recipes, beverage quantities, fuel volumes, laboratory measurements, and container capacities. It lets you compare the same volume or capacity across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
Metric vs Imperial Units: A Practical Comparison
Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →Everyday conversionsUS Gallons vs Imperial Gallons: What Is the Difference?
Compare US liquid gallons and Imperial gallons, understand their exact liter values, and avoid common fuel and recipe conversion errors.
Read guide →Answers at a glance
Frequently asked questions
Is one US fluid ounce exactly 30 milliliters?
No. One US fluid ounce is exactly 29.5735295625 milliliters. Thirty milliliters is a convenient everyday approximation.
Why might a nutrition label show 1 fl oz as 30 mL?
Consumer labels often use permitted rounded equivalents. The converter uses the defined unit relationship rather than a labeling convention.
How does Convr round US fluid ounce to Milliliter results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal us fluid ounce values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
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