gallons (US) to quarts (US) Converter
Type a value in gallons (US) and get the answer in quarts (US) instantly — or convert the other way. The conversion uses the exact relationship 1 gallons (US) = 4 quarts (US), the same formula used in textbooks and engineering references.
The US volume ladder's final step: 1 gallon is exactly 4 quarts. Milk jugs, engine oil and soup pots all speak this language — multiply gallons by 4 and the recipe or oil change is settled.
How to use
- Type your value into the gallons (US) box — the quarts (US) result updates as you type.
- To go the other direction, type into the quarts (US) box instead and read the gallons (US) result.
- Copy the result with one tap, or scan the reference table below for common values.
Frequently asked questions
How do you convert gallons (US) to quarts (US)?
Multiply the number of gallons (US) by 4. For example, 10 gallons (US) = 40 quarts (US). The converter above does this for you and shows more decimal places than you will ever need.
How many quarts (US) are in one gallons (US)?
Exactly 4 quarts (US). This is a fixed definition, not an approximation, so the conversion is exact at any scale.
Is this converter accurate for professional use?
Yes — it uses full double-precision arithmetic and the official gallons (US)-to-quarts (US) factor, so results are reliable for schoolwork, cooking, fitness, travel and technical work.
Can I convert quarts (US) back to gallons (US)?
Yes. The converter is two-way: just type in the second box and the first box updates instantly with the reverse conversion.