Soapmaking Calculator [v1.31]
sbmcrafters.com
Calculations take into account typical impurities percentage found in NaOH and KOH supplies.
This calculator can be used to make Solid Soaps or Liquid Soaps
Enter the amount of each base oil and other ingredients in your recipe below.
Our Lye Calculator will compute the correct amount of alkali and minimum amount of water you need to use to make soap.
Then use our Recipe Resizer on the results page to make the right amount of soap you need for your chosen mold size and shape.
Water calculations are as per the "Failor" method for solid and for liquid soaps.
Liquid soapmakers: Select "Potassium hydroxide" option.
For a more guided experience with more process options, try our
SBMCrafters Advanced Soap Calculator to make solid, liquid, cream and mixed-alkali soaps.
Please support this online soapmaking calculator by purchasing soapmaking supplies from SBMCrafters or consider making a donation (at left). Thank you!
 Note: Read directions for the type of soap you will make before starting!
ALWAYS FOLLOW SOUND SAFETY PRACTICES WHEN MAKING SOAP
 
Enter Your Recipe Name:
 
 
Enter Percent Superfatted:
 
%
 
 
 
Choose Alkali Type Used:  
  Sodium Hydroxide (Lye) - beads, dry
Potassium Hydroxide - use to make liquid soap base
 
Choose Units:  
 
Ounces
Grams
  NOTE: Measures are Weight, NOT Volume
 
Choose
Oils/Fats:
Enter
Amounts:
 
Enter Other
Ingredients:
Enter
Amounts:
Enter
Units:


See your calculated recipe with correct
alkali amount and minimum water needed.
Then use our Recipe Resizer to fit your mold, rectangular or round.