1 US cup is not equal to 16 imperial gallons. Note that this conversion works for cups and gallons within the same system of measurement. Convert 2.3 gallons to cups: 2.3 gal × 16 36.8 cups. Convert 12 cups to gallons: 12 C 16 0.75 gal. One customary cup is equal to 236.5882365 millilitres. To convert a value in gallons to cups, we instead multiply by 16. In the United States, the customary cup is half of a liquid pint or 8 U.S. Because actual drinking cups may differ greatly from the size of this unit, standard measuring cups are usually used instead. It is traditionally equal to half a liquid pint in either US customary units or the British imperial system but is now separately defined in terms of the metric system at values between 1⁄5 and 1⁄4 of a liter. The cup is an English unit of volume, most commonly associated with cooking and serving sizes. There are minerals in the tap water you will use to water your plants and you will. 1 US liquid gallon (gal) is equal to 16 US cups 1 US cup (pt) is equal to 0.0625 US liquid gallons (gal) gallon to cups Formula: The formula for gallons to cups is as follow: US cup US gal x 16. I don’t know about you, but not going to lie, counting out sixteen cups isn’t easy. Because, a standard imperial cup measure of liquid, like water, takes 16 cups to make a gallon. But, pouring cup by cup to fill a liquid gallon isn’t necessarily convenient. There are three definitions in current use: the imperial gallon (≈ 4.546 L) which is used in the United Kingdom and semi-officially within Canada, the United States (liquid) gallon (≈ 3.79 L) which is the commonly used, and the lesser used US dry gallon (≈ 4.40 L). Soak toys in a solution of cup of bleach per gallon of water for 5. Converting cups into a gallon is fairly straightforward. The gallon (abbreviation "gal"), is a unit of volume which refers to the United States liquid gallon. Let's see how both units in this conversion are defined, in this case Gallons and Cups: Gallon (gal)