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Cups to Gallons Converter

Convert cups to gallons and back. Sixteen cups make a US gallon, so this suits big-batch drinks and cooking.

Cups ⇄ Gallons
cups
=
gal
Result16 cups = 1 gal
Quick answer
A US gallon is 16 cups, so divide cups by 16 to get gallons. That means 8 cups is half a gallon and 32 cups is 2 gallons. A gallon is also 4 quarts or 128 fluid ounces, handy when mixing a large batch of punch or iced tea.

Conversion table

Cups (cups)Gallons (gal)
1 cups0.063
4 cups0.25
8 cups0.5
16 cups1
32 cups2
64 cups4
128 cups8
256 cups16

How to convert Cups to Gallons

gallons = cups ÷ 16reverse: cups = gallons × 16 · 1 gallon = 4 quarts
cups
cups you enter
gallons
the result in US gallons
16
cups in one US gallon

These are US gallons. A UK (imperial) gallon is larger, about 18.6 US cups, so keep the systems separate.

Frequently asked questions

How many cups are in a gallon?

A US gallon is 16 cups.

How many cups is half a gallon?

Half a US gallon is 8 cups.

How many gallons is 32 cups?

32 cups is 2 gallons.

Quick facts
1 US gallon
16 cups
1 gallon
4 quarts
1 gallon
128 fl oz
Measures
Volume