RJ's Soapin List Lye Calculator

  1. Enter the amounts of each oil you plan to use. (amounts in weight, not volume)
  2. Choose your units of measure (ounces, grams, lbs.), superfat %, and water discount (if any).
    Tip: if you aren't sure about superfatting, or water discounts - try the default (most common) values.
  3. Choose the % of fragrance/essential oil you would like to use (if any).
    Tip: 1 oz. per pound is aprox. 6%
  4. Click the "Calculate!" button, and your recipe will show.
 
 
 
 
 
 
 
 
 
 
Recipe Name
Type of Lye NAOH KOH
Units of Measure
Superfat* most common is (5-8%)
Water **
Sodium Lactate (NaL)***
Fragrance (EO/FO)***
Convert to
Resize to
Notes:
 

How is this calculated? See the SAP values used for this calculator
 

* What is superfatting: this is the percentage of oil left in your bar of soap after it's saponified. If you didn't superfat
** Water - when making soap using some methods of hot process, a water discount is recommended. Select the amount of you would like to use, and click calculate to get the water amount you will use. Common water usage for HP is about 30 - 35%
***Fragrance - Enter the percent of fragrance you would like to use, and click calculate. The amount will be calculated for you!
NOTE: If there is an oil you would like to have added to this calculator, please contact Melanie.
 
 

How We Calculate
Lye - There is a SAP value supplied for each oil. The amount for each oil is multiplied by it's SAP value. Then all the SAP values are added. If a superfat % is selected, taken from this value.
Water - Our 40% usage for water is being calculated as 40% of the total oils used. Add up the amount of all the oils you entered, and multiple by 0.40 to get the water amount.
Units of Measure - if you are measuring in ounces, everything will be measured in ounces.
Superfat - Most people superfat between 5-8%, but I would like to allow you to choose your own superfat%. This will decrease the amount of lye by that %.
Fragrance/Essential Oil: The amount of fragrance you choose will be multiplied by the total weight of oils in your batch. For example 4% of 100 ounces is 4 ounces of fragrance. Most fragrance/essential oils should be used at a certain rate based on the weight of your oils.