21 US customary cups in imperial gallons

Result

The conversion result is: 21 US customary cups is equivalent to 1.09288486732555 imperial gallons.[1]

Conversion formula
How to convert 21 US customary cups to imperial gallons?

We know (by definition) that: 1 uscup ≈ 0.0520421365393118 imperialgallon.

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

1 uscup / 21 uscup ≈ 0.0520421365393118 imperialgallon / x imperialgallon

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

x imperialgallon ≈ (21 uscup / 1 uscup) * 0.0520421365393118 imperialgallon → x imperialgallon ≈ 1.0928848673255478 imperialgallon

Conclusion:

21 uscup ≈ 1.0928848673255478 imperialgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial gallon is equal to 0.915009467051318 times 21 US customary cups.

It can also be expressed as: 21 US customary cups is equal to 1 / 0.915009467051318 imperial gallons.

Approximation

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