The calculator is pretty easy. You select the info for the color of the male (for example, Snow male is Amel, Anery, plus het Motley), then you select the info for the female (Opal Motley female is Amel, Lavender, Motley) then check "percentages", then "calculate" & it will give you the results in the box to the right.
If you click on My cornsnake isn't here, what do I do?
You will see a list of morphs, & what morphs make up those morphs.
It's a good idead to familiarize yourself with this type of info before you start breeding.