How many ounces are in a fluid ounce?

Answer 1

One.

This is not exactly accurate. Fluid ounces are a measure of volume, where as ounce is a measure of weight. While many chefs believe one can interchange the two, that is not true, for one fluid ounce of flour will weigh much less than one fluid ounce of milk.

Answer 2

There is 1 fluid ounce in 1 ounce (weight). This is a common source of confusion since "ounce" can refer to both weight and volume.