21 US customary cups in imperial cups

Result

The conversion result is: 21 US customary cups is equivalent to 17.4861578772088 imperial cups.[1]

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

We know (by definition) that: 1 uscup ≈ 0.832674184628989 brcup.

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

1 uscup / 21 uscup ≈ 0.832674184628989 brcup / x brcup

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

x brcup ≈ (21 uscup / 1 uscup) * 0.832674184628989 brcup → x brcup ≈ 17.48615787720877 brcup

Conclusion:

21 uscup ≈ 17.48615787720877 brcup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial cup is equal to 0.0571880916907074 times 21 US customary cups.

It can also be expressed as: 21 US customary cups is equal to 1 / 0.0571880916907074 imperial cups.

Approximation

An approximate numerical result would be: twenty-one US customary cups is about seventeen point four eight imperial cups, or alternatively, a imperial cup is about zero point zero six 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.