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 639 quarts into gallons we have to multiply 639 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

639 qt → V_(gal)

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

V_(gal) = 639 qt × 0.25 gal

V_(gal) = 159.75 gal

The final result is:

639 qt → 159.75 gal

We conclude that 639 quarts is equivalent to 159.75 gallons:

639 quarts = 159.75 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.0062597809076682 × 639 quarts.

Another way is saying that 639 quarts is equal to 1 ÷ 0.0062597809076682 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred thirty-nine quarts is approximately one hundred fifty-nine point seven five gallons:

639 qt ≅ 159.75 gal

An alternative is also that one gallon is approximately zero point zero zero six times six hundred thirty-nine 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