How Many Cups in a Gallon?
There are 16 US cups in a US gallon. A UK gallon is 16 half-pint UK cups (284.1 ml), about 19.2 US cups, or 18.2 metric cups.
Gallons to cups
| Gallons | US cups |
|---|---|
| ¼ | 4 |
| ½ | 8 |
| ¾ | 12 |
| 1 | 16 |
| 1 ½ | 24 |
| 2 | 32 |
US, UK and metric cups in a gallon
A US cup is 236.6 ml, or 8 fl oz (see how many ounces in a cup), so 16 × 8 = 128 fl oz in the gallon. The old UK cup is half an imperial pint (284.1 ml), so a UK gallon is also 16 of its own cups, about 19.2 US cups. In Australian and Canadian metric cups of 250 ml, a UK gallon is about 18.2 cups.
Worked example: a gallon of iced tea
You are making a gallon of iced tea with a 2-cup measuring jug. 16 ÷ 2 = 8, so fill the jug 8 times. For half a gallon, fill it 4 times. A quart is 4 cups: see how many cups in a quart.
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Frequently asked questions
Do 16 cups equal 1 gallon?
Yes, 16 US cups = 1 US gallon.
Does 8 cups equal 1 quart?
No. 8 cups is 2 quarts (½ gallon); 1 quart is 4 cups.
How many cups are in 1 and 1/2 gallons?
24 US cups.
What is the weight of a gallon of water?
About 8.35 lb, assuming 1 g per ml. The often-quoted 8.34 lb is that figure rounded down; at room temperature water is about 8.33 lb.