Fluid Ounces to MillilitersFree online conversion calculator — instant results, no sign-up
Convert US fluid ounces to milliliters and back.
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About the Fluid Ounces to Milliliters
The Fluid Ounces to Milliliters calculator converts US fluid ounces into milliliters and shows the reverse conversion relationship. With the default input of 1 fluid ounce, it returns 29.57353 milliliters. It uses US fluid ounces, not Imperial fluid ounces or ounces of weight.
- Value in fluid ounces
- The volume to convert, measured in US fluid ounces, with a default value of 1.
Formula and method
V_mL = V_fl_oz × 29.57353; reverse conversion: V_fl_oz = V_mL ÷ 29.57353.
- V_mLVolume in milliliters.
- V_fl_ozVolume in US fluid ounces.
Multiply the entered US fluid-ounce value by 29.57353 to obtain milliliters. For the default input, 1 × 29.57353 = 29.57353 milliliters. To convert back, divide milliliters by 29.57353; the displayed reverse unit relationship is 1 milliliter = 0.033814 US fluid ounces, rounded to six decimal places.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Value in fluid ounces1 fluid ounces
Results
- milliliters29.57353
- 1 fluid ounces =29.57353 milliliters
- 1 milliliters =0.033814 fluid ounces
How to use the Fluid Ounces to Milliliters
- 1Confirm that your starting measurement is in US fluid ounces rather than Imperial fluid ounces or weight ounces.
- 2Enter the volume in the Value in fluid ounces field, or keep the default value of 1.
- 3Read the milliliter result: the default input gives 29.57353 milliliters.
- 4Check the forward equivalence row, which shows 1 fluid ounce = 29.57353 milliliters for the default input.
- 5Use the reverse relationship to interpret milliliters in US fluid ounces: 1 milliliter = 0.033814 fluid ounces.
Reading your result
The milliliters output is the converted volume, shown as 29.57353 for the default input. The forward equivalence row, “1 fluid ounces = = 29.57353 milliliters,” repeats that result with both units. The reverse row, “1 milliliters = = 0.033814 fluid ounces,” gives the rounded US fluid-ounce equivalent of one milliliter; it is a unit relationship, not the reverse conversion of the entire forward result. The doubled equals signs in these rows should be read as a single equals sign.
Limitations
This calculator assumes US customary fluid ounces. The factor 29.57353 is rounded from the exact US conversion of 29.5735295625 milliliters per fluid ounce, and the displayed reverse factor is also rounded. Small round-trip differences can therefore occur. Fluid ounces measure volume, not mass, so converting weight ounces requires additional information such as density. The documented input accepts fluid ounces; the reverse relationship does not imply a separate milliliter input field. Output precision does not improve the accuracy of the original measurement.
Common questions
Does this calculator use US or Imperial fluid ounces?+
It uses US fluid ounces. Imperial fluid ounces have a different volume, so an Imperial measurement should not be entered as though it were a US measurement.
How do I convert milliliters back to US fluid ounces?+
Divide the milliliter value by 29.57353. The reverse row summarizes this relationship as 1 milliliter = 0.033814 US fluid ounces, rounded.
Why might converting the result back not reproduce the starting value exactly?+
The displayed conversion factors are rounded. In particular, multiplying by the displayed reverse factor of 0.033814 can introduce a small rounding difference; dividing by 29.57353 avoids that additional reverse-factor rounding.
Can I enter ounces from a kitchen scale?+
No. A kitchen scale measures mass in weight ounces, whereas this calculator expects volume in US fluid ounces. A mass-to-volume conversion requires the substance's density.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
Further reading
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Results are estimates for informational purposes and are not financial, medical or legal advice.