How many US cups are in a US gallon?

1 gal = 16 cup. To convert any amount, multiply by 16.

How do you convert US gallons to US cups?

Multiply the number of US gallons by 16 to get US cups. The formula is shown in the "How it's calculated" section above.

Where does the conversion factor come from?

It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.

Unit converter — Volume

US gallons to US cups converter

Convert US gallons (gal) to US cups (cup). Source-cited conversion factor, exact to the displayed precision.

Results are mathematically exact for the displayed precision. How we calculate.

How it's calculated

Convert US gallons to US cups— the formula

US gallons convert to US cups by multiplying by the published conversion factor. The factor below is exact to the precision shown, sourced from the citation under the formula.

cup = gal × 16

gal = cup × 0.0625

Metric volumes per BIPM SI definitions. US customary volumes per NIST Handbook 44: 1 US gal = 3.785411784 L exactly; 1 fl oz = 1/128 US gal.

Questions

Frequently asked questions

How many US cups are in a US gallon?
1 gal = 16 cup. To convert any amount, multiply by 16.
How do you convert US gallons to US cups?
Multiply the number of US gallons by 16 to get US cups. The formula is shown in the "How it's calculated" section above.
Where does the conversion factor come from?
It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.