Question: how much is one fluid ounce of water?
Answer: As a unit of volume, the fluid ounce is equal to 1/16 of a pint, or 29.57 millilitres, in the U.S. Customary System and to 1/20 of a pint, or 28.41 millilitres, in the British Imperial System. A U.S. fluid ounce of water will weigh approx.