Units: cups to mL
The tutor looks at cup to mL for US, Canadian, and metric.
A metric cup is 250mL; US, 236.6mL. A Canadian cup is 227.30mL.
My impression is that 250mL is typically used as a cup. (I can’t imagine someone measuring 237mL of flour.) However, the difference is only about 5%, between those two.
Compared with the Canadian cup, though, the metric cup is about 10% more.
Source:
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.