Soap Making Calculator

Soap Making Calculator helps cold-process soap makers calculate lye, water, oils, superfat, and batch amounts from one focused workspace. Build an oil blend by percentage or weight, review the formula, then save the recipe for later batches.

Plan and organize your making:

• Calculate NaOH and water from your oils, SAP values, superfat, and lye concentration

• Review formula-property estimates for blends made with built-in oils

• Review oil percentages and weights before saving

• Search, favorite, duplicate, archive, and reuse local recipes

• Start batch records and organize target cure dates, notes, and reminders

• Browse built-in oil reference values and keep the source-variation notice close at hand

• Add custom ingredients and simple cost estimates with Pro

• Export clear PDF recipe sheets and CSV records with Pro

• Create and restore local JSON backups with validation

Your records stay local to your device. Soap Making Calculator has no account, ads, analytics, or PatchMedia cloud record store. Exports and backups happen only when you choose them. Google Play processes the optional one-time Pro purchase.

Free includes unlimited calculations and formula insights, up to five saved recipes, up to three active batches, the built-in ingredient reference, notes, basic reminders, and validated local backup and restore. A one-time Pro unlock adds unlimited recipes and batches, custom ingredients, costing, PDF and CSV exports, printable labels, and advanced reminder options. The localized price is shown by Google Play.

Calculations use the values you provide and reference SAP data that can vary by source. Verify your ingredients, units, and process. Lye is hazardous; follow established soapmaking handling practices and use appropriate protective equipment. Cure target dates organize your records and do not certify readiness or safety.