21 imperial gallons in dry gallons

Conversion formula
How to convert 21 imperial gallons to dry gallons?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 1.0320567434887\mathrm{drygallon}$

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

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

Conclusion: 21 ⁢ imperialgallon ≈ 21.673191613262702 ⁢ drygallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry gallon is equal to 0.0461399510438536 times 21 imperial gallons.

It can also be expressed as: 21 imperial gallons is equal to $\frac{1}{\mathrm{0.0461399510438536}}$ dry gallons.

Approximation

An approximate numerical result would be: twenty-one imperial gallons is about twenty-one point six seven dry gallons, or alternatively, a dry gallon is about zero point zero five times twenty-one imperial gallons.