To convert a gallon measurement to a cup measurement, multiply the volume by the conversion ratio.

Since one gallon is equal to 16 cups, you can use this simple formula to convert:


How Many Cups are in a Gallon?

There are 16 cups in a gallon, which is why we use this value in the formula above.

1 gal = 16 c

Gallons and cups are both units used to measure volume. Keep reading to learn more about each unit of measure.

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Gallons

The US liquid gallon is a unit of fluid volume equal to four quarts, eight pints, or sixteen cups.<1> The US liquid gallon should not be confused with the US dry gallon or the imperial gallon, which are different units of measure.

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The gallon is a US customary unit of volume. Gallons can be abbreviated as gal; for example, 1 gallon can be written as 1 gal.

Cups

The cup is a unit of volume equal to 16 tablespoons or 8 fluid ounces. The cup should not be confused with the metric cup or the teacup, which are different units of volume. One cup is equal to just under 236.6 milliliters, but in nutrition labeling, one cup is equal to 240 milliliters.<2>

The cup is a US customary unit of volume. Cups can be abbreviated as c, and are also sometimes abbreviated as C. For example, 1 cup can be written as 1 c or 1 C.


Gallon to Cup Conversion Table

Gallon measurements converted to cups Gallons Cups
1 gal 16 c
2 gal 32 c
3 gal 48 c
4 gal 64 c
5 gal 80 c
6 gal 96 c
7 gal 112 c
8 gal 128 c
9 gal 144 c
10 gal 160 c
11 gal 176 c
12 gal 192 c
13 gal 208 c
14 gal 224 c
15 gal 240 c
16 gal 256 c
17 gal 272 c
18 gal 288 c
19 gal 304 c
20 gal 320 c
21 gal 336 c
22 gal 352 c
23 gal 368 c
24 gal 384 c
25 gal 400 c
26 gal 416 c
27 gal 432 c
28 gal 448 c
29 gal 464 c
30 gal 480 c
31 gal 496 c
32 gal 512 c
33 gal 528 c
34 gal 544 c
35 gal 560 c
36 gal 576 c
37 gal 592 c
38 gal 608 c
39 gal 624 c
40 gal 640 c

References

National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.44-2019.pdfU.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures