US Gallons to US Quarts
Convert us gallons to us quarts instantly. 1 gal = 4 qt. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert us gallons to us quarts
To convert us gallons to us quarts, multiply by 4. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
qt = gal × 4
US Gallons to US Quarts conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| US Gallons | US Quarts |
|---|---|
| 1 gal | 4 qt |
| 2 gal | 8 qt |
| 3 gal | 12 qt |
| 5 gal | 20 qt |
| 10 gal | 40 qt |
| 20 gal | 80 qt |
| 25 gal | 100 qt |
| 50 gal | 200 qt |
| 100 gal | 400 qt |
| 500 gal | 2,000 qt |
| 1,000 gal | 4,000 qt |
What is a us gallon?
Exactly 231 cubic inches — smaller than the imperial gallon.
What is a us quart?
A quarter of a US gallon.
The formula
qt = gal × 4
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the US Gallons to US Quarts
- Type the number of us gallons you want to convert.
- Read the result in us quarts straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked us quarts to us gallons page.
US Gallons to US Quarts — frequently asked questions
How many us quarts are in a us gallon?
One us gallon equals 4 qt. qt = gal × 4
What is the formula to convert us gallons to us quarts?
The formula is qt = gal × 4. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert us quarts back to us gallons?
Divide instead of multiplying: one us quart is 0.25 gal. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this us gallons to us quarts free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error