How many cups in a half gallon?

There are 8 cups in a half gallon.

How Many Cups in a Gallon?

16 cups in 1 gallon

There are exactly 16 cups in a US gallon. Use the chart and calculator below for any amount.

16 cups in a gallon

8 cups in a half gallon

4 cups in a quart

2 cups in a pint

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Full Conversion Chart

This table shows how gallons, quarts, pints, cups, fluid ounces, tablespoons, and teaspoons all relate to each other — the entire US liquid measurement system in one place.

Measurement	Gallons	Quarts	Pints	Cups	Fl. Oz
1 Gallon	1	4	8	16	128
½ Gallon	0.5	2	4	8	64
¼ Gallon	0.25	1	2	4	32
1 Quart	¼	1	2	4	32
1 Pint	⅛	½	1	2	16
1 Cup	1/16	¼	½	1	8
1 Fl. Oz	1/128	1/32	1/16	⅛	1

Easy way to remember: A gallon holds 4 quarts → each quart holds 2 pints → each pint holds 2 cups. So: 4 × 2 × 2 = 16 cups per gallon.

Why This Matters in the Kitchen

Most US recipes use cups, but many ingredients — especially liquids like milk, broth, or juice — are sold by the quart or gallon. Knowing these conversions helps you scale recipes up or down without guessing.

Common real-world examples

A gallon of milk is 16 cups — perfect if a recipe calls for 2 cups and you want to know how many batches you can make (answer: 8). A quart of chicken broth is 4 cups, so a soup recipe calling for 3 cups uses ¾ of a standard carton.

US vs. UK gallons

These conversions apply to the US gallon (128 fl oz). The UK imperial gallon is larger (160 fl oz = 20 cups). Most recipes you'll find online use US measurements unless stated otherwise.

Frequently Asked Questions

How many cups in a gallon of water?

16 cups. Water, milk, juice — any liquid follows the same conversion. 1 US gallon = 16 cups regardless of what's in it.

How many 8 oz cups in a gallon?

16 cups. A standard US cup is 8 fluid ounces, so 16 × 8 = 128 fl oz = 1 gallon.

How many cups in 2 gallons?

32 cups. Just multiply: 2 × 16 = 32.

How many cups in a gallon of ice cream?

16 cups by volume. A standard gallon tub of ice cream is 16 cups, though ice cream is often measured by the quart (4 cups) when sold in stores.

How many 16 oz cups in a gallon?

8 cups. Since 16 oz = 2 standard cups, divide 16 (total cups per gallon) by 2 to get 8.