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I love soapcalc.net It has a bit of a learning curve, but play around with it. If you look around on it, you see that it has all the steps numbered.
Step 1 is picking NaOH or KOH (sodium or potassium hydroxide). The default is NaOH, leave it on this for bar soaps.
Step 2 is the amount of oils you want to use for your mold. The default is 1 pound. Just put what size you want. (if you need to know how to figure out how much oil to use for your mold I can post the formula)
Step 3 is how much water or liquid to use. If you are just beginning, just leave at the default.
Step 4 is what superfat your want to use. The default is 5%. I personally like 7 and change it to that. Under the super fat is your fragrance. The default is empty, but a good middle ground is .7 oz ppo (per pound oil). You may have to go up or down depending on the fragrance or essential oil.
Step 5 is something you can use once you really want to start formulating your own recipe. Leave it alone for now.
Step 6 is picking the oils you want to use. The list of oils is on the left. Click the oil you want to use and then enter the % next to it. Your %'s have to total 100%.
Step 7 is saving your recipe. It is up right above the oils you picked.
Step 8 is calculating your recipe. Click that and it will calculate how much oils to use.
The last step is to click "View or Print Recipe" This will take you to a new page that will give you the total amounts to use for water, lye, oils and fragrance.
This calc, nor any really, will not take extra stuff color, botanicals etc into account. That is because it can all vary so very much.
I hope this helps, let me know if it doesn't.