On the pool calculator (pwrstrk's link above), hover over the field where it shows the number of oz. to add. For example for FC, if it says to add 21 oz. of bleach, put your mouse pointer over the "21". Look at the white box directly above which has "Mouse over a field for detail" off to the right of it. This will tell you how many cups or jugs or other imperial volume measurement to use. You can do this same thing for the pH and TA and other values. Hover over the value, and then look at one of those white boxes on the page.