There are a number of metric conversion tables on the Web. Here is one
good one.

http://www.sciencemadesimple.com/conversions.html

Here in the U.S., most measuring "cups" (both glass "Pyrex" and metal
measuring cups) have both American and metric printed, or embossed,
measurements on them. Look at your measuring cups, they might have
American/English measurements on them, too.

Regards, Nancree