Gallon (US) to Cup (US) Converter

Volume Converter

40 units available

Decimals:

From

To

16

1 gal = 16 cup

Formula:

cup = gal × 16

With your value: 1 gal = 16 cup

How big is that?

Everyday references on a logarithmic scale, all expressed in gallon (us) so you can sanity-check the result.

Milk carton (1/3.8e+3 your value)0.000264 gal

Kitchen bucket (1/3.8e+2 your value)0.00264 gal

Car fuel tank (1/76 your value)0.0132 gal

Bathtub (1/19 your value)0.0528 gal

Hot tub (1/2.5 your value)0.396 gal

Your value1.00 gal

Other Gallon (US) to Cup (US) conversions

2 gal to cup 3 gal to cup 4 gal to cup 5 gal to cup 6 gal to cup 7 gal to cup 8 gal to cup

Gallon (US) to Cup (US) Conversion Table

Gallon (US) (gal)	Cup (US) (cup)
0.5	8
1	16
2	32
5	80
10	160
15	240
20	320
25	400
50	800
100	1,600
250	4,000
500	8,000
1000	16,000

Cup (US) to Gallon (US) Conversion Table

Cup (US) (cup)	Gallon (US) (gal)
0.5	0.03125
1	0.0625
2	0.125
5	0.3125
10	0.625
15	0.9375
20	1.25
25	1.5625
50	3.125
100	6.25
250	15.625
500	31.25
1000	62.5

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Gallon (US) (gal)

Volume

Exact conversion

The US liquid gallon is exactly 231 cubic inches = 3.785 411 784 L.

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Cup (US) (cup)

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Gallon (US) to Cup (US)

To convert from Gallon (US) (gal) to Cup (US) (cup), multiply the value by 16.

Formula: cup = gal × 16

Reverse: gal = cup × 0.0625

Step-by-Step Example

Start with your value in Gallon (US). For example: 5 gal
Multiply by the conversion factor: 5 x 16
The result is: 80 cup

About Gallon (US)

The US gallon equals approximately 3.785 liters and is the standard unit for fuel and large liquid volumes in the United States.

Fun Fact: The US gallon is about 20% smaller than the imperial (UK) gallon.

Common uses: fuel (US), beverages, swimming pools.

About Cup (US)

The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.

Common uses: baking, cooking, recipes.

Frequently Asked Questions

How many Cup (US) are in 1 Gallon (US)?

There are exactly 16 Cup (US) in 1 Gallon (US). This means the conversion factor from Gallon (US) to Cup (US) is 16.

What is the formula to convert Gallon (US) to Cup (US)?

The formula to convert Gallon (US) to Cup (US) is: cup = gal × 16. For example, to convert 10 Gallon (US) to Cup (US), you would multiply 10 by 16.

What is a Gallon (US)?