Conversion formula

The conversion factor from fluid ounces to gallons is 0.0078125, which means that 1 fluid ounce is equal to 0.0078125 gallons:

1 fl oz = 0.0078125 gal

To convert 320 fluid ounces into gallons we have to multiply 320 by the conversion factor in order to get the volume amount from fluid ounces to gallons. We can also form a simple proportion to calculate the result:

1 fl oz → 0.0078125 gal

320 fl oz → V_(gal)

Solve the above proportion to obtain the volume V in gallons:

V_(gal) = 320 fl oz × 0.0078125 gal

V_(gal) = 2.5 gal

The final result is:

320 fl oz → 2.5 gal

We conclude that 320 fluid ounces is equivalent to 2.5 gallons:

320 fluid ounces = 2.5 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.4 × 320 fluid ounces.

Another way is saying that 320 fluid ounces is equal to 1 ÷ 0.4 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred twenty fluid ounces is approximately two point five gallons:

320 fl oz ≅ 2.5 gal

An alternative is also that one gallon is approximately zero point four times three hundred twenty fluid ounces.

Conversion table

fluid ounces to gallons chart

For quick reference purposes, below is the conversion table you can use to convert from fluid ounces to gallons