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 721 fluid ounces into gallons we have to multiply 721 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

721 fl oz → V_(gal)

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

V_(gal) = 721 fl oz × 0.0078125 gal

V_(gal) = 5.6328125 gal

The final result is:

721 fl oz → 5.6328125 gal

We conclude that 721 fluid ounces is equivalent to 5.6328125 gallons:

721 fluid ounces = 5.6328125 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.17753120665742 × 721 fluid ounces.

Another way is saying that 721 fluid ounces is equal to 1 ÷ 0.17753120665742 gallons.

Approximate result

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

721 fl oz ≅ 5.633 gal

An alternative is also that one gallon is approximately zero point one seven eight times seven hundred twenty-one 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