Advanced Soap & Lye Calculator for soap makers

Easy to use. Powerful. Free. No ads.

The Cosmetics Lab Soap Calculator offers the perfect balance of simplicity and power:

  • Clear, clutter-free UI — focus on your recipe, not the noise.
  • Save up to 20 recipes and 5 templates — all your recipes in one place.
  • Oil list, sortable by fatty acid and properties.
  • Extensive additives list.
  • Neat bar graphs — check your soap’s properties at a glance.
  • Guided Wizards — perfect for beginners who need guidance.
  • One-Page Mode — full control when you want advanced options.
  • Learn fast — browse our tutorials
Start Creating Your Soap Recipe
The Cosmetics Lab Soap Calculator — clean UI with property graphs
Guided wizard interface for creating a soap recipe
Quick Start

Ease of use, clean layout

Create recipes in just a few clicks with a clean, guided layout that works seamlessly on desktop and mobile.

  • Intuitive layout with clearly organized sections
    • Create a new recipe in just a few clicks ( watch demo )
    • Fully optimized for mobile devices
    Experience the clean layout
    Recipe management screen showing saved soap recipes and templates
    Save & organize

    Space for your soap ideas

    Keep up to 20 recipes and 5 templates, manage them all in one place, and adapt them into new variations with ease.

    • Save up to 20 recipes and 5 templates
    • Templates let you spin off variations in seconds
    • Manage all your recipes from a single page
    • Edit, copy, rename, or print with ease
    • Download/print QR codes – scan to reopen and edit your recipe anytime.
    • Export your recipes to Excel
    Start your recipe
    Ingredient selection interface with categorized oils and additives
    Smart ingredient picker

    Easy ingredient selection

    Browse an extensive, categorized ingredient library with tips, sorting options, and clear safety alerts.

    • Extensive, categorized ingredient library
    • Flexible sorting of selected oils and additives
    • Helpful tips and warnings at every step
    • Clear alerts for ingredients needing special care (e.g., water discount or extra lye)
    Choose your ingredients
    Printout view showing soap recipe details with bar graphs for properties and fatty acids
    Clear results

    Neat & easy-to-read results

    Get clean, accurate printouts with all the details you need, plus property graphs at a glance and print settings remembered for next time.

    • Clean, well-organized, easy-to-read printouts
    • Includes all critical details to minimize mistakes
    • Property and fatty acid bar graphs at a glance
    • Rich print settings to tailor your output
    • Print preferences remembered for next time
    See recipe results instantly
    Article and video resources with chapters
    Learn fast

    Step-by-step guide and full video walkthrough

    Whether you’re new or returning, get up to speed quickly with a concise article and a chaptered video tutorial.

    • Quick start short video
    • Actionable, beginner-friendly guide
    • Full video tutorial with chapters
    Browse resources

    Ready to make your next soap recipe?

    Effortless to use — accurate and reliable.

    Try the Soap Calculator