Gallons to Quarts Converter
Convert US gallons to quarts. Enter gallons — whole or decimal — and get quarts, plus the same volume in pints, cups, and liters from the exact US liquid measure chain.
Example: with US gallons 2 → Quarts: 8 quarts.
- In pints16 pints
- In cups32 cups
- In liters7.57 L
Computed by the calculator below using its default values. Change any input to see your own numbers.
quarts = gallons × 4. The full chain: 1 gallon = 4 quarts = 8 pints = 16 cups = 128 fl oz, all exact.
The gallon splits cleanly into fours
US liquid measure doubles at every step down: a gallon holds 4 quarts, each quart holds 2 pints, each pint holds 2 cups. Multiply gallons by 4 and you have quarts — 2 gallons is 8 quarts, a half gallon is 2. Because these are definitions rather than measurements, the numbers are exact, which is why the same chain shows up on paint cans, motor oil, and stock pots without rounding footnotes.
The liter column is where precision enters: the US gallon is defined as exactly 3.785411784 liters, so 2 gallons is 7.57 L. Watch for the imperial gallon in UK and older Canadian sources — at 4.54609 L it is 20 percent larger, and its quarts are correspondingly bigger too.
How it’s calculated
Quarts = gallons × 4; pints = gallons × 8; cups = gallons × 16 (exact US definitions). Liters = gallons × 3.785411784, the exact NIST definition of the US liquid gallon.
US liquid measure only — imperial gallons are 4.54609 L, and US dry gallons (4.405 L) use a separate system for produce.
Gallons to quarts quick reference
| Gallons | Quarts | Also equals |
|---|---|---|
| 0.25 gal | 1 qt | 32 fl oz |
| 0.5 gal | 2 qt | milk half gallon |
| 1 gal | 4 qt | 128 fl oz |
| 1.5 gal | 6 qt | 24 cups |
| 2 gal | 8 qt | 32 cups |
| 3 gal | 12 qt | 48 cups |
| 5 gal | 20 qt | bucket size |
US liquid measure: 1 gallon = 4 quarts exactly; other columns follow the same chain.
Common mistakes
- Dividing by 4 instead of multiplying — 2 gallons is 8 quarts, not 0.5.
- Applying the US factor to imperial gallons; a UK gallon is 4.546 L and holds 4 bigger imperial quarts.
- Quoting a 5-gallon bucket's rated size as usable volume — fill lines run about 10 percent lower.
- Mixing dry-gallon produce measures into liquid recipes.
Frequently asked questions
How many quarts are in a gallon?
Exactly 4. The formula is quarts = gallons × 4, so 2 gallons is 8 quarts and 3.5 gallons is 14 quarts.
How many quarts are in a half gallon?
Two quarts. A half gallon is also 4 pints, 8 cups, or 64 fluid ounces — the standard milk carton size.
How many liters is a gallon?
A US gallon is exactly 3.785411784 liters. That makes a quart 0.946 L, just under a liter — a useful mental anchor when comparing US and metric containers.
Why does a quart of oil say 946 mL while some bottles say 1 L?
US-packaged quarts are 946 mL; metric-market bottles round up to a full liter. The two differ by about 5.7 percent, which matters when an engine calls for 5 quarts.