Sure, you'll do fine.

At the top of the Chlorine and Chlorination topic, and the Testing topic, there are stickied threads on b-b-b, Best Guess and Newbie chemistry.

They should help.

1 gallon of household bleach (5.25%) will add just over 2.5 ppm of FC. 1 gallon of ultra (6%) will add 3 ppm of Free Chlorine (FC).

1.5 gallons of regular will add just under 8ppm. 1.5 gallons of Ultra will add 9 ppm.