The amount of space (fluid ounces) that one ounce (weight) of a substance will occupy depends on what substance it is. One ounce (weight) of air will fill as many fluid ounces (space) as you let it....
6.5!
If you're asking about conversions between fluid ounces and ounces, this is what you need to know:1 ounce of water in mass is 1 fluid ounce. This is where the volumetric measure fluid ounces was...