Question 1

How many US fluid ounces are in one US gallon?

Accepted Answer

One US gallon equals 128 fl oz. The formula is fl oz = gal × 128.

Question 2

How do I convert US gallons to US fluid ounces?

Accepted Answer

Multiply the value in US gallons by 128. For example, 100 × 128 = 12,799.999984 — so 100 gal = 12,799.999984 fl oz.

Question 3

How many US gallons are in one US fluid ounce?

Accepted Answer

One US fluid ounce equals 0.007813 gal.

US gallons to US fluid ounces

All units