Question

How do you convert 25.00 mL to qt.?

Answer 1

Well first, you have to decide what a `"QUART"` is! In the UK this is `"2 pints"`, `1200` `mL` (`=` `1.200*L`). In the States, it is `0.946` `L`. https://en.wikipedia.org/wiki/Quart

Explanation:

In both US and Imperial systems a `"quart"` is short for a QUARTER of a GALLON. Of course, the US gallon and the Imperial gallon are different.

Given that `1` `US` `quart` `=` `0.946` `L` or `946` `mL`, `25.00` `mL` `=` `(25.00*cancel(mL))/(946*(cancel(mL)*"quart"^-1)` `=` `??` `"quarts"`.

It's questions like these that remind me how truly decadent the Imperial system of measurement is: pounds, ounces, feet, furlongs, chains, poles. Of course, we are going to be stuck with these units for some time. In the question above I was able to solve the problem dimensionally, i.e. I had the conversion `mL*"quart"^-1`, and when I did the calculation the extraneous units cancelled out.

Do not be persuaded that these conversions are easy. Anyone can make an error, and the 2 systems of measurements (actually 3 systems of measurement) are hard to interconvert.