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Soap Lye & Recipe Calculator

Calculate exact lye (NaOH), water, and oil amounts for any cold process soap recipe. Adjust superfat and water discount in real time.

Batch Settings

Total Oil Weight (oz)

Lye Type

Superfat %5%

Recommended: 5–8% for bar soap

Water Discount %0%

0% = full water (38% of oils). Higher = harder unmold.

Oil Percentages

100.0% ✓

Olive Oil40%

Coconut Oil30%

Palm Oil30%

Your results will appear here

Set your oils to 100% and click Calculate

Free Calculator Includes

Lye (NaOH) calculator

Oil percentage calculator

Superfat adjustment

Water discount calculations

Printable recipe output

Ready to run your soap business like a pro?

Save recipes, track ingredient costs, manage batches, and grow with AI — all in one place.

Maker Studio AI — Your studio. Your recipes. Your business.Maker Studio AI organizes every part of your handmade product business — from ingredients to income — in one place built for makers like you.Features

Recipes & Formulation — Full lye calculator, fatty acid profile, quality score analysis, and AI-powered recipe generation.

Batch Records — MOCRA-compliant production logs with photos, cure dates, and notes.

Inventory — Track ingredients, landed costs, and finished product stock.

Show Planner — Plan craft fairs and markets with production checklists and sales tracking.

Marketing Companion — AI-generated product descriptions, social media captions, and email content.

Finance Dashboard — Cost of goods, gross profit, and pricing recommendations from your real data.

PricingFree 14-day trial. No credit card required. Paid plans from $19/month.AboutBuilt by Live Soap School, founded by Zakia Ringgold — a handmade soap maker, cosmetic formulator, and educator. Learn more at livesoapschool.com.

Recipe & Formulation Tools

Design better soap and cosmetic recipes with confidence. Maker Studio AI includes a full lye calculator, fatty acid profile analyzer, quality score predictor, AI-powered recipe generator, and ingredient substitution assistant.

Lye calculator for NaOH (bar soap) and KOH (liquid soap)
Fatty acid profile breakdown (lauric, myristic, oleic, linoleic, stearic, ricinoleic, palmitic)
Quality score prediction: hardness, cleansing, conditioning, bubbly lather, creamy lather, INS, iodine value
AI recipe generator from selected ingredients
Ingredient substitution suggestions with formulation guidance

Business Management Tools

Run your handmade product business from one place. Track ingredients and expenses, log production batches, manage inventory, plan craft shows, record sales, and understand your finances without building spreadsheets.

Ingredient & expense tracking with automatic COGS calculation
MOCRA-compliant batch records with photos, cure dates, and notes
Finished goods inventory with reorder alerts
Show planner with production checklists and booth cost tracking
Sales recording across online, wholesale, and in-person channels
AI-generated product descriptions, social captions, and email content
Financial dashboard: revenue, COGS, gross profit, and pricing recommendations

Recipe & Formulation Tools — Business Management Tools — Help & FAQ — Knowledge Base