A faster, friendlier way to formulate soap

This page highlights the most useful capabilities of The Cosmetics Lab Soap Calculator.

It’s beginner-friendly while offering the depth advanced soapmakers expect — and calculations you can trust.

It aims to make your process smoother, faster, reliable and distraction-free.

Completely free and ad-free — enjoy all features without distractions or hidden costs.

A better soap calculator experience, start to finish

No more wrestling with clunky tools or distracting ads — just focus on making great soap.

Simple & intuitive: A clear, guided layout helps beginners calculate recipes with confidence.
Advanced when you need it: Fine-tune every batch with lots of advanced features.
Mobile—friendly: Works beautifully on any device.
Beautiful printouts: Create neat, customizable recipe sheets for the workshop.
Ample room for your recipes: Save up to 20 named recipes and 5 templates
One-click backup: Export all your recipes to an Excel .xlsx file whenever you like.

Let the calculator handle the tricky parts—so you can focus on your recipe.

Masterbatch support: Use pre-made lye solutions with correct calculations.
Automatic adjustments: Suggested water discounts for milk, beer, etc., and lye compensation for additives like citric or lactic acid (fully adjustable).
Mold size calculator: Enter mold dimensions to estimate total oil weight instantly.
Flexible units: Mix and match grams, ounces, teaspoons, drops, and more—no manual math.
Sortable Oils & Fats list: Easily compare properties/fatty acids and quickly spot which oils match the properties you’re looking for.

Save your work: Keep up to 20 named recipes and 5 templates.
Stay organized: Add titles, images, and notes for easy reference.
Experiment freely: Duplicate and tweak recipes without starting over.
Export everything to Excel (.xlsx): — a unique feature among soap calculators, perfect for backing up your recipes.
Download/print QR codes – scan to reopen and edit your recipe anytime.

Free and ad-free: A focused experience without clutter.
Built by a soapmaker & developer: Practical features shaped by real-world use.
Continuously improved: Updates guided by community feedback.
Proven accuracy: Results match the trusted standards you’re familiar with (e.g. SoapCalc), so you can switch calculators with confidence.

Open The Cosmetics Lab soap / lye calculator and see why thousands of soapmakers are switching.