SoapCraft: Soap Calculator

Enter oils by weight or percentage, pick your water method, and get NaOH or KOH totals instantly. Save, scale, and share every recipe from one focused calculator.

Build cold process, hot process, or KOH liquid soap recipes, choose your water method, check the lye amount, then save, scale, copy, and share recipes from one focused app.

Free features

• Calculate NaOH and KOH soap recipes
• Enter oils by percentage or weight
• Use grams, ounces, or pounds
• Choose lye concentration, water:lye ratio, or water as % of oils
• Review lye, water, oil, fragrance, additive, and batch totals
• See water-equivalent cross-checks so settings are easier to understand
• Save up to three recipes with notes and favorites
• Copy and share plain text recipe summaries
• Duplicate recipes and resize batches while staying within the free recipe limit
• Read beginner-friendly warnings for missing oils, unusual superfat, and invalid totals

Pro features

• Unlimited saved recipes and recipe duplication
• Add custom oils with your own SAP values
• View complete recipe quality profiles when oil data is available
• Follow Make mode checklists while you work
• Track cure dates and ready batches
• Export polished recipe sheets as image or PDFSoapCraft is a calculator and recipe organizer. It does not certify recipe safety or make medical or skin-care claims. Always follow appropriate lye handling and soapmaking safety practices.