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 420 quarts into gallons we have to multiply 420 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

420 qt → V_(gal)

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

V_(gal) = 420 qt × 0.25 gal

V_(gal) = 105 gal

The final result is:

420 qt → 105 gal

We conclude that 420 quarts is equivalent to 105 gallons:

420 quarts = 105 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.0095238095238095 × 420 quarts.

Another way is saying that 420 quarts is equal to 1 ÷ 0.0095238095238095 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four hundred twenty quarts is approximately one hundred five gallons:

420 qt ≅ 105 gal

An alternative is also that one gallon is approximately zero point zero one times four hundred twenty 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