Free professional soap calculator
Professional Soap Calculator & Soap Making Software
Create soap recipes with our free professional soap calculator and advanced formulation analysis. Support for NaOH, KOH, and hybrid formulations includes real-time feedback and scientific metrics—then take your recipes further with tools for batches, inventory, production, costs, and managing your growing soap business.
Free Soap Calculator with Soap Analysis. Premium Features Available.
Free Professional Soap Calculator & Recipe Analysis
Formulate precise cold process and hot process soap recipes with advanced NaOH and KOH calculations, dual-lye support, real-time formulation feedback, SAP data, fatty-acid analysis, and detailed soap-property metrics.
How to Use the CalculatorRecipe: New Recipe
Calculator Settings
Lye & Water
Configure lye type, purity, and water calculations
Enter your supplier's purity (%). Values must be greater than 0 and at most 100.
Fragrance
Add fragrances and essential oils to your soap
Additives
Add powders, liquids, and toppings to customize your soap
Oils, Fats, Butters, Waxes & Acids
Select and configure below
Recipe Notes
Bar quality estimates unavailable
No conventional bar-quality metrics are available for this recipe. Lye and water amounts are unaffected when they are still available.
- Add oils and a batch weight to see bar quality estimates.
Recipe Ingredients
Lye & Water
Oils, Fats, Butters, Waxes & Acids
From Formula to Finished Batch
Formulate. Analyze. Produce. Grow.
SoapMetrics starts with a powerful soap calculator and grows with your soap-making workflow. Create better formulas, keep recipes organized, track every batch, manage inventory, and bring the entire process together in one place.
Stage 1
Formulate
Build your recipe with the free professional soap calculator. Create NaOH, KOH, or dual-lye formulas using accurate SAP values, live calculations, and real-time totals.
Stage 2
Analyze
Understand your formula before you make it. Review fatty-acid profiles, soap qualities, formulation balance, and detailed analysis to help you make informed adjustments.
Stage 3
Save & Organize
Save your favorite recipes to your SoapMetrics workspace, keep formulas organized, and easily return to proven recipes whenever you are ready to make another batch.
Stage 4
Produce
Turn a saved recipe into a tracked batch. Record pour dates, curing progress, batch notes, reminders, and the exact recipe snapshot used for production.
Stage 5
Manage
Keep ingredients, supplies, molds, and finished soap organized with inventory tools designed around the way soap makers actually work.
Stage 6
Grow
Bring formulation, production, inventory, and batch management together in one platform—whether you are perfecting your craft, selling at local markets, or growing a soap-making business.
Open the free soap calculator to start a recipe. Read more about SoapMetrics as soap making software →
Premium Membership
Take your soap making beyond the calculator.
Purchases are processed through Stripe and billed monthly.
Soap calculator questions
Quick answers before you start. For lye calculator settings, dual-lye formulas, and everything about Premium, see the full FAQ.
Is the SoapMetrics soap calculator free, and do I need an account?
Yes. The soap calculator, lye calculator, and recipe analysis are completely free, but a free account is required to use them. Premium adds batch tracking, inventory, cost calculator, Ask SoapMetrics, and cure reminders on top.
Can I calculate NaOH and KOH recipes, including dual-lye?
Yes — sodium hydroxide for bar soap, potassium hydroxide for liquid and paste soap, or both together in a dual-lye recipe. See the full FAQ for water methods, superfat, and lye purity details.
Is SoapMetrics only a soap calculator?
No. The free calculator and lye calculator are the foundation, but SoapMetrics is also soap making software — recipe organization, batch tracking, inventory, cost calculator, and cure reminders for makers running more than one formula at a time.
Looking for more? See the full FAQ.