Cups to Gallons Conversion (c to gal)

Cups to Gallons Converter

Enter the volume in cups below to convert it to gallons.

Result in Gallons:

1 c = 0.0625 gal

How to Convert Cups to Gallons

To convert a measurement in cups to a measurement in gallons, divide the volume by the following conversion ratio: 16 cups/gallon.

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

gallons = cups ÷ 16

The volume in gallons is equal to the volume in cups divided by 16.

For example, here's how to convert 5 cups to gallons using the formula above.

gallons = (5 c ÷ 16) = 0.3125 gal

conversion scale showing cups and equivalent gallons volume values

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

What Is a Cup?

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 standard cup is equal to 236.588 milliliters, but for nutrition labeling, one cup is defined as 240 milliliters.^[1] To further confuse things, a metric cup is equal to 250 mL, while in Japan, a cup is equivalent to only 200 mL.

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.

Learn more about cups.

What Is a Gallon?

The US liquid gallon is a unit of fluid volume equal to four quarts, eight pints, or sixteen cups.^[2] The US liquid gallon should not be confused with the US dry gallon or the imperial gallon, which are different units of measure.

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.

Learn more about gallons.

Cup to Gallon Conversion Table

Table showing various cup measurements converted to gallons.
Cups	Gallons
1 c	0.0625 gal
2 c	0.125 gal
3 c	0.1875 gal
4 c	0.25 gal
5 c	0.3125 gal
6 c	0.375 gal
7 c	0.4375 gal
8 c	0.5 gal
9 c	0.5625 gal
10 c	0.625 gal
11 c	0.6875 gal
12 c	0.75 gal
13 c	0.8125 gal
14 c	0.875 gal
15 c	0.9375 gal
16 c	1 gal
17 c	1.0625 gal
18 c	1.125 gal
19 c	1.1875 gal
20 c	1.25 gal
21 c	1.3125 gal
22 c	1.375 gal
23 c	1.4375 gal
24 c	1.5 gal
25 c	1.5625 gal
26 c	1.625 gal
27 c	1.6875 gal
28 c	1.75 gal
29 c	1.8125 gal
30 c	1.875 gal
31 c	1.9375 gal
32 c	2 gal
33 c	2.0625 gal
34 c	2.125 gal
35 c	2.1875 gal
36 c	2.25 gal
37 c	2.3125 gal
38 c	2.375 gal
39 c	2.4375 gal
40 c	2.5 gal

Table showing various cup measurements converted to gallons.

Cups

Gallons

1 c

0.0625 gal

2 c

0.125 gal

3 c

0.1875 gal

4 c

0.25 gal

5 c

0.3125 gal

6 c

0.375 gal

7 c

0.4375 gal

8 c

0.5 gal

9 c

0.5625 gal

10 c

0.625 gal

11 c

0.6875 gal

12 c

0.75 gal

13 c

0.8125 gal

14 c

0.875 gal

15 c

0.9375 gal

16 c

1 gal

17 c

1.0625 gal

18 c

1.125 gal

19 c

1.1875 gal

20 c

1.25 gal

21 c

1.3125 gal

22 c

1.375 gal

23 c

1.4375 gal

24 c

1.5 gal

25 c

1.5625 gal

26 c

1.625 gal

27 c

1.6875 gal

28 c

1.75 gal

29 c

1.8125 gal

30 c

1.875 gal

31 c

1.9375 gal

32 c

2 gal

33 c

2.0625 gal

34 c

2.125 gal

35 c

2.1875 gal

36 c

2.25 gal

37 c

2.3125 gal

38 c

2.375 gal

39 c

2.4375 gal

40 c

2.5 gal

References

U.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
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.pdf