Gallons to Quarts Converter

About the gal to qt calculation

One gallon is exactly 4 quarts, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The US gallon is 3.785 L. The imperial gallon is 4.546 L — a 20% difference. A quarter of a US gallon, and exactly two US pints.

Formula

qt = gal × 4

1 gal = 4 qt
1 qt = 0.25 gal

Worked example

To convert 1 gal, multiply by 4: 1 × 4 = 4 qt.

Frequently asked questions

How many quarts are in a gallon?

There are 4 quarts in one gallon. To convert any amount, multiply the number of gallons by 4.

How do I convert quarts back to gallons?

Divide instead of multiplying, or equivalently multiply by 0.25. One quart is 0.25 gallons.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between gallons and quarts is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.

Where is each of these units used?

Gallons: the US gallon is 3.785 L. The imperial gallon is 4.546 L — a 20% difference. Quarts: a quarter of a US gallon, and exactly two US pints.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units