Conversion formula

The conversion factor from quarts to gallons is 0.25, which means that 1 quart is equal to 0.25 gallons:

1 qt = 0.25 gal

To convert 688 quarts into gallons we have to multiply 688 by the conversion factor in order to get the volume amount from quarts to gallons. We can also form a simple proportion to calculate the result:

1 qt → 0.25 gal

688 qt → V_(gal)

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

V_(gal) = 688 qt × 0.25 gal

V_(gal) = 172 gal

The final result is:

688 qt → 172 gal

We conclude that 688 quarts is equivalent to 172 gallons:

688 quarts = 172 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.0058139534883721 × 688 quarts.

Another way is saying that 688 quarts is equal to 1 ÷ 0.0058139534883721 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 quarts is approximately one hundred seventy-two gallons:

688 qt ≅ 172 gal

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

Conversion table

quarts to gallons chart

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