Hey @Complex_Math - hopefully Anderson’s link was helpful? That site is a super reference for LP conversion.
When you’re using the site and have found the Corp you’re gaining LP for I find it useful to sort by ‘isk/lp’ and then take a look at the ‘5% Volume’ column. Obviously items with more ‘isk/lp’ are better but if they don’t sell through quickly you may not see that isk very fast, sometimes it’s a wise choice to go for the items with less ‘isk/lp’ but that are selling more often.