How Many Cups in a Gallon?
1 US gallon = 16 cups; a half gallon = 8 cups; a quarter gallon (1 quart) = 4 cups.
A US gallon holds 16 cups. The gallon splits neatly in halves: 8 cups in a half gallon of milk, 4 cups in a quart, 2 cups in a pint. A full gallon is about 3.79 liters and a gallon of water weighs roughly 8.36 pounds.
Gallons to cups, quarts and pints
| Gallons | Cups | Quarts | Pints | Liters |
|---|---|---|---|---|
| ¼ gallon | 4 cups | 1 quart | 2 pints | 0.946 liter |
| ½ gallon | 8 cups | 2 quarts | 4 pints | 1.89 liters |
| ¾ gallon | 12 cups | 3 quarts | 6 pints | 2.84 liters |
| 1 gallon | 16 cups | 4 quarts | 8 pints | 3.79 liters |
| 1½ gallons | 24 cups | 6 quarts | 12 pints | 5.68 liters |
| 2 gallons | 32 cups | 8 quarts | 16 pints | 7.57 liters |
| 3 gallons | 48 cups | 12 quarts | 24 pints | 11.4 liters |
| 5 gallons | 80 cups | 20 quarts | 40 pints | 18.9 liters |
Cups to gallons
| Cups | Gallons |
|---|---|
| 1 cup | 0.063 gallon |
| 2 cups | 0.125 gallon (⅛ gallon) |
| 4 cups | 0.25 gallon (¼ gallon) |
| 6 cups | 0.375 gallon (⅜ gallon) |
| 8 cups | 0.5 gallon (½ gallon) |
| 12 cups | 0.75 gallon (¾ gallon) |
| 16 cups | 1 gallon |
| 32 cups | 2 gallons |
A quick way to remember it
Picture a big G (gallon) holding four Qs (quarts); each Q holds two Ps (pints) and each P holds two Cs (cups). Four quarts times two pints times two cups gives the 16 cups in a gallon.
US gallon vs imperial gallon
British recipes that use an imperial gallon mean about 4.55 liters, which is roughly 19.2 US cups. If a recipe is from the UK and quantities look large, that is usually why.
Common questions
How many cups is ½ gallon?
½ gallon = 8 cups.
How many cups is 2 gallons?
2 gallons = 32 cups.
How many cups is 3 gallons?
3 gallons = 48 cups.
How many cups is ¼ gallon?
¼ gallon = 4 cups.
How many fl oz are in 1 gallon?
1 gallon = 128 fl oz.