At the link is an excel spreadsheet that calculates the amounts of Lye and water for your soapmaking, based on the Fats/oils you plan to use. Note, I have not used this shee, but it seems to be okay based on my recall. ALWAYS check the pH of your final mix before using
https://drive.google.com/file/d/1PsLKdXj1i5cRTQSA8p77MZkT_zhpNLdr/view?usp=sharing
https://drive.google.com/file/d/1PsLKdXj1i5cRTQSA8p77MZkT_zhpNLdr/view?usp=sharing