21 metric teaspoons in imperial quarts
Result
The conversion result is: 21 metric teaspoons is equivalent to 0.0923870842856169 imperial quarts.[1]
Conversion formula
How to convert 21 metric teaspoons to imperial quarts?
We know (by definition) that: 1 brteaspoon ≈ 0.00439938496598176 imperialquart.
We can set up a proportion to solve for the number of imperial quarts.
1 brteaspoon / 21 brteaspoon ≈ 0.00439938496598176 imperialquart / x imperialquart
Now, we cross multiply to solve for our unknown x:
x imperialquart ≈ (21 brteaspoon / 1 brteaspoon) * 0.00439938496598176 imperialquart → x imperialquart ≈ 0.09238708428561695 imperialquart
Conclusion:
21 brteaspoon ≈ 0.09238708428561695 imperialquart

Conversion in the opposite direction
The inverse of the conversion factor is that 1 imperial quart is equal to 10.8240238095238 times 21 metric teaspoons.
It can also be expressed as: 21 metric teaspoons is equal to 1 / 10.8240238095238 imperial quarts.
Approximation
An approximate numerical result would be: twenty-one metric teaspoons is about zero point zero nine imperial quarts, or alternatively, a imperial quart is about ten point eight two times twenty-one metric teaspoons.
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.