How many ounces is 3 gallons?

Answer 1

An ounce is a measure of weight whereas a gallon is a measure of volume.

However, a fluid ounce is a measure of volume and assuming you meant this:

In the UK:

1 pt = 20 fl oz

1 gallon = 8pt = 160 fl oz

3 gallons = 480 fl oz

In the US:

1 pt = 16 fl oz

1 gallon = 8pt = 128 fl oz

3 gallons = 384 fl oz

Answer 2

384 - There are 128 US liquid ounces per gallon.

Answer 3

'Ounces(ozs) is a measure of Imperial Weight

'Gallons' is a measure of Imperial Liquid Volume.

To equate you need to know the density of the substance.