Convert US gallons to US quarts

Enter a value in US gallons to convert it to US quarts.

=US quarts

US gallons to US quarts reference

US gallonsUS quarts
1 gal4 qt
2 gal8 qt
5 gal20 qt
10 gal40 qt
25 gal99.9999 qt
50 gal199.9999 qt
100 gal399.9998 qt

The conversion factor

One US gallon is 3.99999789 US quarts. So to convert, multiply your figure in US gallons by 3.99999789. To go the other way, multiply US quarts by 0.25000013, or use the US quarts to US gallons converter.

Doing it in your head

For a quick estimate, round the factor: roughly "times 4". Use the exact converter above when the number matters.

Where this conversion comes up

Cooking and baking (especially US vs metric recipes), fuel, and container sizes.

See the common unit conversions cheat sheet for the factors worth memorising.

Related tools

US quarts to US gallonsliters to US gallonsUS gallons to litersmilliliters to US fluid ouncesUS fluid ounces to millilitersliters to millilitersmilliliters to liters

Frequently asked questions

How many US quarts are in a US gallon?
1 US gallon = 3.999998 US quarts.
What is the formula to convert US gallons to US quarts?
Multiply the number of US gallons by 3.99999789. To go back the other way, multiply US quarts by 0.25000013.
What is 10 US gallons in US quarts?
10 US gallons = 40 US quarts. The reference table below lists more common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.

Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.