Quarts to Gallons Converter

About the qt to gal calculation

One quart is exactly 0.25 gallons, so converting between them is a single multiplication. Enter any value above and the result updates as you type. A quarter of a US gallon, and exactly two US pints. The US gallon is 3.785 L. The imperial gallon is 4.546 L — a 20% difference.

Formula

gal = qt × 0.25

1 qt = 0.25 gal
1 gal = 4 qt

Worked example

To convert 1 qt, multiply by 0.25: 1 × 0.25 = 0.25 gal.

Frequently asked questions

How many gallons are in a quart?

There are 0.25 gallons in one quart. To convert any amount, multiply the number of quarts by 0.25.

How do I convert gallons back to quarts?

Divide instead of multiplying, or equivalently multiply by 4. One gallon is 4 quarts.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between quarts and gallons 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?

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

Sources

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