Free Tools

Interactive calculators built for soap making for beginners. No sign-up, no downloads — enter your numbers and get an answer you can act on.

Calculate the exact sodium hydroxide and water for any cold-process soap recipe, with a superfat you control.

Figure out how many ounces of oil your mold holds so your recipe fills it without overflowing.

Work out how much fragrance or essential oil to add to a cold-process batch at any usage rate.