Are you looking to make a 4lb batch because you have a 4lb soap mold? If that is the case, then your total oils will need to weigh less than 4lbs because you need to save room for the lye and water that also takes up space in the mold. If you think soapcalc.com is too difficult, then use the MMS (www.thesage.com) lye calculator; its much easier and it will insure your lye amount is correct. You should really always get into the habit of using a lye calculator for each recipe you make and any changes you make to the recipe, since each oil requires a different lye amount. If the case is that you are trying to fill up a mold that holds 4lbs, here is a recipe for you that includes some of the oils you listed: Castor Oil: 3oz (6.25%) Coconut Oil: 14oz (29.17%) Olive Oil: 19oz (39.58%) Shea Butter: 5oz (10.42%) Soybean Oil: 7oz (14.58%) I would'nt suggest using both canola and soybean with the addition of olive and castor. Your bar may be to soft with all four liquid oil types, especually without adding palm. So I suggest to omit the canola. When you plug these amounts into the MMS lye calculator, it will give you a range of water to add: 12-18oz. I always go with right around the middle: 16oz (30% lye solution). The lye calculator will also give you a lye amount range to use: 6.41oz-7.12oz. I always like to go with the 3%-4% excess fat range, which will be around 6.90oz of lye. This should fill your 4lb mold right up to the brim with fragrance added as well.