achemistlab.com
Soap Maker Pro
IFRA-style guidance · NaOH & KOH · Fatty acid profile · Print-ready
Chemistry-grade soap calculator for serious makers.
Formulate professional cold-process and liquid soap with accurate NaOH/KOH math, 150+ oil library, IFRA-style fragrance suggestions, additives, fatty acid profile and AI-style formulation tips.
Alkali
NaOH 98% · KOH 90%
Lye concentration & superfat
Lye concentration & superfat
Libraries
150+ oils
130+ fragrances
130+ fragrances
Documentation
2-page batch sheet
Safety & QC checklist
Safety & QC checklist
Quick start
From template → adjust → print
- 1. Choose a standard recipe (classic market bar, luxury butter, Castile, salt spa, KOH paste).
- 2. Confirm NaOH or KOH, lye concentration and superfat.
- 3. Adjust oils, fragrance and additives; review fatty acid profile and AI suggestions.
- 4. Print the two-page batch sheet and follow safety + QC steps.
Always cross-check fragrance and essential oil usage against your supplier’s IFRA documentation and local regulations for your product type and region.
Soap formulation calculator
Real-time NaOH/KOH calculations with purity, 150+ oil profiles, fatty acid metrics, IFRA-style fragrance guidance, additives and AI-style formulation notes.
Batch
Recipe settings
Oils
Total: 0% · Status: —
| Oil | % | Weight (g) | Alkali (g) |
|---|
Oil intelligence
Select an oil row to see SAP, typical usage, pros/cons and how it affects hardness, cleansing, conditioning and lather.
Blend metrics
Hardness—
Cleansing—
Conditioning—
Bubbly—
Creamy—
Iodine—
INS—
Fatty acid profile
Approximate based on typical oil composition.
Values are approximate. Always treat them as guide ranges; actual supplier analysis can vary.
Fragrance / essential oil
Auto uses library IFRA-style max percentage for rinse-off soap; editable for your actual product limits.
Safety summary
Max rate—
Max grams—
Status—
Additives & extras
Clays, exfoliants, colorants, powders, chelators and other extras. Auto uses internal g/kg guidance.
| Ingredient | Type | Weight (g) | Notes |
|---|
Select an additive type to see typical grams per kg of oils and handling notes.
AI-style formulation suggestions
Rule-based assistant based on blend metrics, lye concentration, superfat, fragrance and additives.
Batch summary
Auto-updates
Total oils
0 g
Total alkali
0 g
Water
0 g
Lye solution
0 g
Fragrance
0 g
Extras
0 g
Total batch (approx.)
0 g
Includes oils + corrected alkali + water + fragrance + extras.
Standard recipes
Classic, high-selling formulations tuned for balance, luxury, Castile, salt spa and KOH paste.
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Libraries in this page
All formulation data – oils, fragrances, and additives – is built directly into this tool for reliable access.
Oils
—
Fragrances
—
Additives
—
IFRA-style fragrance limits are guidance for rinse-off soap; always verify against your actual product type and supplier’s official IFRA certificate.
Soap Maker Pro — Batch Sheet
My Soap Recipe
Generated by achemistlab.com
Date:
Alkali:
Recipe details
Total oils—
Lye concentration—
Superfat—
Fragrance—
Totals
Total alkali—
Water—
Lye solution—
Total batch—
Oil breakdown
| Oil | % | Weight (g) | Alkali (g) |
|---|
Extras
| Ingredient | Type | Weight (g) | Notes |
|---|
Blend metrics
Hardness—
Cleansing—
Conditioning—
Bubbly—
Creamy—
Iodine—
INS—
Safety, process & quality control
Safety instructions (alkali handling)
- Always add alkali to water, never water to alkali.
- Wear gloves, goggles and protective clothing.
- Work in a well-ventilated area and avoid inhaling fumes.
- Use heat-safe, non-reactive containers and tools.
- Clearly label chemicals and keep out of reach of children and pets.
Batch size recommendations
Test batch: 300–700 g oils.
Standard batch: 1000–2000 g oils.
Scale-up: increase gradually and log temperatures, trace time, and any acceleration.
Mixing & curing instructions
- Target mixing temperature: 38–43°C (100–110°F) for both oils and lye solution.
- Blend to stable emulsion, then to light or medium trace depending on swirl/design.
- Add fragrance and additives at light trace unless supplier suggests otherwise.
- Unmold typically within 18–48 hours, depending on formula and mold type.
- Cure bars 4–6+ weeks in a cool, dry, ventilated area for best mildness and longevity.
AI-style improvement suggestions
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Optimization notes
Quality control checklist