Gallons To Cups Conversion (gal To C) - Inch Calculator

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• Gallons to Cups Converter
• How to Convert Gallons to Cups
• How Many Cups Are in a Gallon?
• What Is a Gallon?
• What Is a Cup?
• Gallon to Cup Conversion Table
• References

Person Icon By Joe Sexton

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Sexton, J. (n.d.). Gallons to Cups Converter. Inch Calculator. Retrieved December 18, 2025, from https://www.inchcalculator.com/convert/gallon-to-cup/

How to Convert Gallons to Cups

To convert a measurement in gallons to a measurement in cups, multiply 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:

cups = gallons × 16

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

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

cups = (5 gal × 16) = 80 c

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.

What Is a Gallon?

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.

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.

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.[2] 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.

Gallon to Cup Conversion Table

Table showing various 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

1. 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
2. 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

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