ml to oz formula
To convert milliliters to US fluid ounces, multiply the number of milliliters by 0.0338140227018. In symbols: fl oz = mL × 0.0338140227018.
One milliliter equals 0.0338140227018 US fluid ounces, and one US fluid ounce equals 29.5735295625 milliliters. This page converts to US fluid ounces, where 1 fl oz is exactly 29.5735295625 ml (1/128 of a US gallon).
Worked example
Suppose you have 500 milliliters and need the answer in US fluid ounces.
- Write the formula: fl oz = mL × 0.0338140227018.
- Put in the number: 500 × 0.0338140227018 = 16.90701135.
- Round to suit the job. 16.91 fl oz is accurate enough for most everyday uses.
So 500 mL is 16.90701135 fl oz. To check, convert back: 16.90701135 fl oz is 500 mL.
Common milliliters to US fluid ounces values
| milliliters (mL) | US fluid ounces (fl oz) |
|---|---|
| 1 | 0.0338140227 |
| 2 | 0.0676280454 |
| 5 | 0.1690701135 |
| 10 | 0.338140227 |
| 20 | 0.676280454 |
| 50 | 1.690701135 |
| 100 | 3.38140227 |
Reference points
Some familiar amounts in milliliters, converted to US fluid ounces:
- 30 mL, a shot glass: 1.01442 fl oz
- 100 mL, the carry-on liquid limit per container: 3.3814 fl oz
- 355 mL, a US soda can: 12.004 fl oz
- 500 mL, a water bottle: 16.907 fl oz
Where you will use it
Drink bottles, skincare, baby milk and medicine are marked in milliliters, while US labels and airline liquid rules mention fluid ounces. Travelers check bottle sizes against the carry-on limit.
Quick mental math
Divide by 30 for a rough count: 500 ml is 16.7 by the shortcut and 16.9 fl oz exactly. Rule of thumb: multiply by 0.034. For 500 mL this gives 17 fl oz against the exact 16.91, an error of 0.55 percent.
Going the other way
Need the reverse? Use the oz to ml converter. For comparison, 1 fl oz is 29.57353 mL. To compare every volume unit at once, open the volume converter.
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