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 18.5 fluid ounces into gallons we have to multiply 18.5 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

18.5 fl oz → V_(gal)

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

V_(gal) = 18.5 fl oz × 0.0078125 gal

V_(gal) = 0.14453125 gal

The final result is:

18.5 fl oz → 0.14453125 gal

We conclude that 18.5 fluid ounces is equivalent to 0.14453125 gallons:

18.5 fluid ounces = 0.14453125 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 6.9189189189189 × 18.5 fluid ounces.

Another way is saying that 18.5 fluid ounces is equal to 1 ÷ 6.9189189189189 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eighteen point five fluid ounces is approximately zero point one four five gallons:

18.5 fl oz ≅ 0.145 gal

An alternative is also that one gallon is approximately six point nine one nine times eighteen point five 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