21 imperial cups in US gallons

Result

The conversion result is: 21 imperial cups is equivalent to 1.57624677722512 US gallons.[1]

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

We know (by definition) that: 1 brcup ≈ 0.0750593703440534 usgallon.

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

1 brcup / 21 brcup ≈ 0.0750593703440534 usgallon / x usgallon

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

x usgallon ≈ (21 brcup / 1 brcup) * 0.0750593703440534 usgallon → x usgallon ≈ 1.5762467772251214 usgallon

Conclusion:

21 brcup ≈ 1.5762467772251214 usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.634418426383991 times 21 imperial cups.

It can also be expressed as: 21 imperial cups is equal to 1 / 0.634418426383991 US gallons.

Approximation

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