# 21 US customary cups in dry gallons

## Conversion

21 US customary cups is equivalent to 1.12791919718009 dry gallons.[1]

## Conversion formula How to convert 21 US customary cups to dry gallons?

We know (by definition) that: $1\mathrm{uscup}\approx 0.0537104379609565\mathrm{drygallon}$

We can set up a proportion to solve for the number of dry gallons.

$1 ⁢ uscup 21 ⁢ uscup ≈ 0.0537104379609565 ⁢ drygallon x ⁢ drygallon$

Now, we cross multiply to solve for our unknown $x$:

$x\mathrm{drygallon}\approx \frac{21\mathrm{uscup}}{1\mathrm{uscup}}*0.0537104379609565\mathrm{drygallon}\to x\mathrm{drygallon}\approx 1.1279191971800866\mathrm{drygallon}$

Conclusion: $21 ⁢ uscup ≈ 1.1279191971800866 ⁢ drygallon$

## Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry gallon is equal to 0.886588332302618 times 21 US customary cups.

It can also be expressed as: 21 US customary cups is equal to $\frac{1}{\mathrm{0.886588332302618}}$ dry gallons.

## Approximation

An approximate numerical result would be: twenty-one US customary cups is about one point one two dry gallons, or alternatively, a dry gallon is about zero point eight nine times twenty-one US customary cups.

## Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.