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 28 fluid ounces into gallons we have to multiply 28 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

28 fl oz → V_(gal)

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

V_(gal) = 28 fl oz × 0.0078125 gal

V_(gal) = 0.21875 gal

The final result is:

28 fl oz → 0.21875 gal

We conclude that 28 fluid ounces is equivalent to 0.21875 gallons:

28 fluid ounces = 0.21875 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 4.5714285714286 × 28 fluid ounces.

Another way is saying that 28 fluid ounces is equal to 1 ÷ 4.5714285714286 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-eight fluid ounces is approximately zero point two one nine gallons:

28 fl oz ≅ 0.219 gal

An alternative is also that one gallon is approximately four point five seven one times twenty-eight 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