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, superfat %, and water discount (if any).
    Tip: If you aren't sure what superfat % or water discount to use, 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.
Almond Oil Aloe Butter Apricot Kernal Oil
Arachis Oil Avocado Butter Avocado Oil
Babassu Oil Bear Tallow Beef Hoof
Beeswax Black Seed Oil Borage Oil
Butterfat, Cow Butterfat, Goat Camelina Oil
Camellia Oil Candedilia Wax Canola Oil
Carnauba Wax Castor Oil Chicken Fat
Cocoa Butter Coconut Oil Cod Liver Oil
Coffee Seed Corn Oil Cottonseed Oil
Emu Oil Evening Primrose Oil Flaxseed Oil
Goose Fat Grapeseed Oil Hazelnut Oil
Hempseed Oil Horse Fat Illipe Butter
Java Cotton Oil Jojoba Oil Karanja Oil
Kokum Butter Kukui Nut Oil Lanolin
Lard Linseed Oil Macadamia Oil
Maize Oil Mango Butter Meadowfoam
Mink Oil Monoi de Tahiti Mowrah Butter
Mustard Oil Neat Foot Neem Oil
Nutmeg Butter Olive Oil Ostrich Oil
Palm Butter Palm Kernel Oil Palm Oil
Palm, Stearic Passion Fruit Seed Oil Peach Kernel Oil
Peanut Oil Pecan Oil Pistachio Nut
Poppyseed Oil Pumpkinseed Oil Rabbit Fat
Rapeseed Red Raspberry Oil Rice Bran Oil
Ricinus Oil Rose Hip Seed Safflower Oil
Sal Butter Sesame Oil Shea Butter
Shea Oil (Liquid) Shortening Soybean Oil
Sunflower Oil Sweet Oil Tallow, Bear
Tallow, Beef Tallow, Deer Tallow, Goat
Tallow, Sheep Tamanu Virgin Coconut Oil
Walnut Oil Wheat Germ
Recipe Name
Type of Lye NAOH KOH
Units of Measure
Superfat* most common is 5-8%
Water Discount**
Sodium Lactate
Fragrance (EO/FO)***
Convert to
Resize to
Notes:
 

How is this calculated?     See SAP Values
* Superfat % means how much oils should remain in the bar of soap once saponified. Enter ALL oils used into the calculator, including ones added at trace.
** Water Discount - when making soap using HP, a water discount is recommended. Select the amount of discount you would like to use, and click calculate to get the water amount you will use. Common discounts are 10-20%
***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 0% discount 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 %.

Water Discount - If you would like to use less water than the 40% default, choose how much to discount by. This will decrease the amount of water in your recipe 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.
Type of Lye - NAOH (Sodium Hydroxide) is used to create a hard bar of soap. KOH (Potassium Hydroxide) is used to make liquid soap. Some people will make "soft" soap using half and half - but we do not calculate that one.
Dilution Water - This rate is not a constant, but we calculate the low dilution water to be 2 times the total oils, and the high dilution water amount to be 3 times the dilution water. We recommend adding this slowly until you get the desired consistency, whether it's less or more of what the calculator recommends.