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Soap Calculator
Soap CalculatorRecipe Workspace
Calculator

手工皂配方計算機 — Make Soap Making Easy

即時精算出最適的鹼液與水量比例，輕鬆設計出專屬您的手工皂配方。

Jump to BuilderBrowse Quick Start
Recipe Flow
From mold to cure
Four connected tools, one workflow.
Modes
Beginner & Expert
Safe defaults first, full control when needed.
Output
Save, print & share
Reusable recipes with instant totals.
Soapmaking workbench with oils, scale, beaker, soap bars, and a calculator dashboard
Current BatchBeginner Mode

Start a new batch

Recipe inputs look balanced. Review the result panel next.

Workspace status
Not saved yet

Add oils and a batch size to start automatic local saves.

Next step
Add the first oils

Start from a quick template or build your own blend from the oil list.

Selected Oils
0
Build the blend you want to evaluate.
Coverage
0%
Target exactly 100% before making soap.
Total Oils
500 g
Batch size drives lye, water, and additive totals.
Workflow
Ready to review
Use the results panel after the builder looks balanced.
Units:
Batch Size
Ready

500 g ready

Oils Added
Pending

Pick oils or use a starter template.

Blend Total
Pending

Oil blend is balanced at 100%

Results
Pending

Finish setup to unlock the result panel

1 of 4 setup steps complete
Beginner flow keeps setup simple and safe.

Recent Recipes

Saved locally on this device. The latest version of each recipe updates automatically.

Up to 5 recipes

No saved recipes yet. Start a recipe and it will appear here automatically.

Recipe Builder

Beginner flow: set basics, add oils to 100%, then review results.

Recipe Basics

Start with batch size, soap type, and a clear label
Beginner Mode uses safe defaults: Superfat 5% and Water 38% of oils. Switch to Expert Mode for custom lye and water settings.

Used for exports and printouts.

NaOH for bar soap, KOH for liquid soap.

g

Combined weight of all oils.

Quick sizes:

Oils & Fats

0 oils0% assigned

Add oils until the blend reaches 100%, then review the results panel.

Add at least one oil to start the blend.
0%
0% of oils added100% remaining

Oil percentages must total 100% before making.

Showing top 15 most common oils. Disable beginner mode to see all 31 oils.

No oils selected. Add oils to start your recipe.
Add oils to see results

Simple 4-step workflow

Move from ingredients to a ready recipe without jumping between disconnected notes, spreadsheets, and calculators.

1

Size the batch

Set the oil weight directly or start from mold sizing.

2

Build the oil blend

Use a template or tune oils until the blend reaches 100%.

3

Check lye and water

Review the calculated NaOH, KOH, water, and safety checks.

4

Save the recipe

Keep local versions, print, copy, or share a recipe link.

Mold sizingFragrance ratesOil libraryCure trackerBeginner guide
Soapmaking workflow from oils and scale to mold and cured soap bars

Soap Calculator FAQ

Practical answers for common recipe setup questions.

Read full guide
What does this soap calculator compute?

It calculates lye amount, water amount, total batch weight, and recipe quality indicators from your selected oils and settings.

Can beginners use this safely?

Yes. Beginner Mode locks safe defaults (5% superfat and standard water settings) and highlights common input mistakes with one-click fixes.

Does it support liquid soap and hybrid lye?

Yes. You can switch between NaOH, KOH, and Hybrid modes in recipe settings.

How do I size a recipe for my mold?

Open Mold Calculator, enter mold dimensions or water-fill weight, then apply the calculated oil weight back to the main calculator.