Conversion formula

The conversion factor from gallons to fluid ounces is 128, which means that 1 gallon is equal to 128 fluid ounces:

1 gal = 128 fl oz

To convert 13 gallons into fluid ounces we have to multiply 13 by the conversion factor in order to get the volume amount from gallons to fluid ounces. We can also form a simple proportion to calculate the result:

1 gal → 128 fl oz

13 gal → V_{(fl oz)}

Solve the above proportion to obtain the volume V in fluid ounces:

V_{(fl oz)} = 13 gal × 128 fl oz

V_{(fl oz)} = 1664 fl oz

The final result is:

13 gal → 1664 fl oz

We conclude that 13 gallons is equivalent to 1664 fluid ounces:

13 gallons = 1664 fluid ounces

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 fluid ounce is equal to 0.00060096153846154 × 13 gallons.

Another way is saying that 13 gallons is equal to 1 ÷ 0.00060096153846154 fluid ounces.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that thirteen gallons is approximately one thousand six hundred sixty-four fluid ounces:

13 gal ≅ 1664 fl oz

An alternative is also that one fluid ounce is approximately zero point zero zero one times thirteen gallons.

Conversion table

gallons to fluid ounces chart

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