How many milliliters are in one ounce?

How many milliliters are in one ounce?

• A. 30 mL
• B. 15 mL
• C. 45 mL
• D. 50 mL

Answer: (A)

Converting ounces to milliliters relies on the basic fact that a fluid ounce is about 29.57 milliliters, which is commonly rounded to 30 mL for practical use in dosing and recipe measurements. So one ounce is approximately 30 milliliters. The other options don’t fit because they correspond to different fractions of an ounce or a different amount entirely: 15 mL is roughly half an ounce, not a full ounce; 45 mL is about 1.5 ounces; and 50 mL is a little more than 1.5 ounces.

Converting ounces to milliliters relies on the basic fact that a fluid ounce is about 29.57 milliliters, which is commonly rounded to 30 mL for practical use in dosing and recipe measurements. So one ounce is approximately 30 milliliters.

The other options don’t fit because they correspond to different fractions of an ounce or a different amount entirely: 15 mL is roughly half an ounce, not a full ounce; 45 mL is about 1.5 ounces; and 50 mL is a little more than 1.5 ounces.