🧪 Volume Converter

Gallons to Cups
( gal → cup )

Instantly convert US gallons to US cups. Enter any value below and get an accurate result with the full formula and reference table.

Converter Tool
gal
cup
Result
1 gal = 16 cups
16
cup
The Formula
cup = gal × 16
1 US gallon = 16 US cups. This relationship is exact in US customary units.

How to Convert Gallons to Cups

To convert US gallons to US cups, multiply the number of gallons by 16. This is because one gallon is defined as exactly 16 cups in the US customary system.

Step-by-Step Example

Let’s convert 2 gallons to cups:

1. Multiply by 16: 2 × 16 = 32
2. So 2 gallons equals 32 cups.

For a smaller amount, 0.5 gallon × 16 = 8 cups.

When You’d Use Each Unit

Gallons are commonly used in the US for measuring large volumes of liquids like gasoline, milk, or water. Cups are used for measuring ingredients like flour, sugar, milk, or water in recipes. Converting between them helps scale recipes accurately and understand serving sizes.

Conversion Table

Common gallons values converted to cups — typical values highlighted.

Gallons (gal) Cups (cup) Approximate
Frequently Asked Questions
How do I convert gallons to cups quickly? +
Multiply the number of gallons by 16. For example, 3 gallons × 16 = 48 cups.
How many cups are in a gallon? +
There are 16 cups in one US gallon.
What is 1 gallon in cups? +
1 gal = 16 cups.
What is 1 cup in gallons? +
1 cup = 1/16 gal = 0.0625 gal.
Is this the same for UK gallons? +
No, UK gallons are larger (≈4.546 L) and 1 UK gallon = 20 UK cups. This converter uses US customary units.
Can I convert cups back to gallons with this tool? +
Yes! Just type a value into the cups field and the gallons field updates automatically. Or use the ⇄ swap button to switch directions.
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