How Many Cups In a Gallon?

Gallons to Cups Conversion

To find out how many cups in "x" gallons, enter a volume in gallons into the converter and the result will be displayed.

How many cups are there in a gallon?

There are 16 cups in a US fluid gallon and 18.62 cups in a US dry gallon. There are 16 imperial cups in an imperial gallon and 18.18 metric cups in an imperial gallon in UK.

Here is how:

For US:

In United States, 1 gallon has a capacity of 128 US fluid ounces and 1 US cup has a capacity of 8 US fluid ounces. That makes 128 / 8 = 16 cups in a gallon in US.

For Imperial System:

In Imperial system 1 gallon has a capacity of 160 imperial fluid ounces and 1 imperial cup has a capacity of 10 imperial fluid ounces. That makes 160 / 10 = 16 imperial cups in an imperial gallon in UK.

For Imperial Gallon to Metric Cup (UK):

Please note that UK now uses metric cups instead of the traditional imperial cups.

In Imperial system 1 gallon has a capacity of 4546.09 mL (160 imperial fluid ounces) and 1 metric cup has a capacity of 250 mL. That makes 4546.09 / 250 = 18.18436 metric cups in an imperial gallon.

How to convert from gallons to cups?

To convert from gallons to cups, multiply the number of gallons "x" by 16 for US fluid gallon and imperial gallon and 18.618355 for US dry gallon.

For example, to find out how many cups there are in a gallon and a half, multiply 1.5 by 16, that makes 24 cups in 1.5 gallons.

You may also use this volume units conversion tool to convert between US, imperial gallons and cups.

What is a gallon?

Gallon is an imperial and US customary measurement system volume unit. There is one type of gallon in the imperial system and 2 types (fluid and dry) in the US customary measurement system. The abbreviation is "gal".

One US fluid gallon is defined as 231 cubic inches and one US dry gallon is 268.8 cubic inches. An imperial gallon is 277.4 cubic inches. One US fluid ounce equals to 29.5 mL and one imperial ounce equals to 28.4 mL.

What is a cup?

Cup is a volume unit used to measure the liquid and dry foods. There is no international standard for the cup sizes but mostly US and metric cups are used. 1 US cup is 8 US fluid ounces, 1 imperial cup is 10 imperial fluid ounces, 1 Canadian cup is 8 imperial fluid ounces and 1 metric cup is 250 mL. The abbreviation is "c".

The list for your reference:

1 Gallon [Fluid, US] = 16 Cups [US]
1 Gallon [Dry, US] = 18.618355 Cups [US]
1 Gallon [Imperial] = 16 Cups [Imperial]
1 Gallon [Imperial] = 18.18436 Cups [Metric]

US & Imperial Gallons to Cups:

1/8 gal = 2 cups
1/4 gal = 4 cups
1/2 gal = 8 cups
1 gal = 16 cups
3/2 gal = 24 cups
2 gal = 32 cups
5/2 gal = 40 cups

Imperial Gallons to Metric Cups:

1/8 imp. gal = 2.27 metric cups
1/4 imp. gal = 4.54 metric cups
1/2 imp. gal = 9.1 metric cups
1 imp. gal = 18.18 metric cups
3/2 imp. gal = 27.2 metric cups
2 imp. gal = 36.3 metric cups
5/2 imp. gal = 45.5 metric cups

For all conversions to find out how many cups there are in "x" gallons please check the table below. If the gallons to cups conversion value that you are looking for is not listed in the conversion table, you may also create your own custom conversion table.


Enter a gallon value to convert into cups:

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Conversion Table [US, Fluid]