To convert milliliters to U.S. fluid ounces, multiply the number of milliliters by 0.033814. One milliliter equals approximately 0.033814 U.S. fluid ounces. If converting to U.K. fluid ounces, multiply milliliters by 0.0351951 rather than 0.033814, because a U.S. and U.K. fluid ounce have different volumes.
- Determine the number of milliliters you want to convert
First, determine how many milliliters you have. If you need to measure the number of milliliters, use a volume measurement device, such as a graduated cylinder, volumetric flask or pipette, to capture the substance and read the volume.
Multiply the number of milliliters by 0.033814.
- Express your answer in terms of U.S. fluid ounces
Express the result in U.S. fluid ounces. For example, if you are converting 100 milliliters to U.S. fluid ounces, your result is 3.3814 U.S. fluid ounces, not just 3.3814.