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Unit Converter

Conversion formula

The conversion factor from gallons to cups is 16, which means that 1 gallon is equal to 16 cups:

1 gal = 16 cup

To convert 21 gallons into cups we have to multiply 21 by the conversion factor in order to get the volume amount from gallons to cups. We can also form a simple proportion to calculate the result:

1 gal → 16 cup

21 gal → V(cup)

Solve the above proportion to obtain the volume V in cups:

V(cup) = 21 gal × 16 cup

V(cup) = 336 cup

The final result is:

21 gal → 336 cup

We conclude that 21 gallons is equivalent to 336 cups:

21 gallons = 336 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 0.0029761904761905 × 21 gallons.

Another way is saying that 21 gallons is equal to 1 ÷ 0.0029761904761905 cups.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one gallons is approximately three hundred thirty-six cups:

21 gal ≅ 336 cup

An alternative is also that one cup is approximately zero point zero zero three times twenty-one gallons.

Conversion table

gallons to cups chart

For quick reference purposes, below is the conversion table you can use to convert from gallons to cups

gallons (gal) cups (cup)
22 gallons 352 cups
23 gallons 368 cups
24 gallons 384 cups
25 gallons 400 cups
26 gallons 416 cups
27 gallons 432 cups
28 gallons 448 cups
29 gallons 464 cups
30 gallons 480 cups
31 gallons 496 cups