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 688 fluid ounces into gallons we have to multiply 688 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

688 fl oz → V_(gal)

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

V_(gal) = 688 fl oz × 0.0078125 gal

V_(gal) = 5.375 gal

The final result is:

688 fl oz → 5.375 gal

We conclude that 688 fluid ounces is equivalent to 5.375 gallons:

688 fluid ounces = 5.375 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.18604651162791 × 688 fluid ounces.

Another way is saying that 688 fluid ounces is equal to 1 ÷ 0.18604651162791 gallons.

Approximate result

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

688 fl oz ≅ 5.375 gal

An alternative is also that one gallon is approximately zero point one eight six times six hundred eighty-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