The calculator soap makers
actually deserve.
Real-time lye calculations, quality scores, fatty acid profiles, EO blend safety, cost tracking, and cloud-saved recipes. No ads. No guessing.
Finally a calculator that doesn't look like it was built in 2003. The quality scores alone saved my first batch.
The IFRA compliance checker is worth the Pro price alone. I can't believe I was guessing before.
Built by someone who actually makes soap. Every feature is exactly what you need and nothing you don't.
Everything SoapCalc should have been
Built by a soap maker, for soap makers.
Precise lye calculations
Accurate NaOH and water amounts from a 54-oil database with real SAP values. Superfat and lye concentration fully adjustable.
Quality scores
Hardness, Cleansing, Conditioning, Bubbly, Creamy, Iodine, and INS scores with ideal range indicators — so you know your bar before you pour.
EO blend builder
Build your fragrance blend with per-EO usage rates, automatic IFRA Cat 9 compliance checking, and "how to add" tips for each oil.
Cost & profit calculator
Enter your purchase prices and SoapSapo calculates your cost per bar, suggested retail price, and margin at 3×, 4×, and 5× markup.
Cure calendar
Track every batch from pour to cure-complete. See which bars are ready for your next farmers market before you pack your booth.
Batch Size Calculator
Enter your mold dimensions and SoapSapo calculates the exact oil weight for a perfect fill — with presets for popular Winston & Walter molds.
INCI label generator
Auto-generates the correct INCI ingredient list in descending order — ready to copy onto your label, no guesswork required.
Fatty acid profiles
Visual breakdown of lauric, palmitic, oleic, and all other fatty acids — so you understand why your bar performs the way it does.
Natural Colorant Studio
60+ botanical, mineral, and synthetic colorants with at-pour vs. cured color previews, a blend mixer, pH warnings, and auto-generated INCI names.
AI recipe assistant
Describe the bar you want and SoapSapo's AI builds a starting recipe — adjusting oils, scent, and colorants to match your goals.
Community library
Browse, clone, and remix recipes shared by makers around the world. Publish your own to show off what you've built.
Batch log & GMP records
Log every pour with oil temp, lye temp, trace time, and lye lot number. Full production records for MoCRA compliance — no spreadsheets required.
Simple pricing
Start free. Upgrade when you're ready to grow.
- ✓Full lye calculator
- ✓5 saved recipes
- ✓Quality scores & fatty acids
- ✓INCI label generator
- ✓Batch size calculator
- ✓Print recipe cards
- ✓Unlimited saved recipes
- ✓Recipe folders & organization
- ✓EO blend builder + IFRA safety
- ✓Cost & profit calculator
- ✓Cure calendar & batch tracking
- ✓Export, backup & share cards
- ✓1 photo per recipe
- ✓Community library (browse & clone)
- ✓AI recipe assistant (20/month)
- ✓Everything in Pro
- ✓10 photos per recipe
- ✓Natural colorant database
- ✓Synthetic & mica colorants
- ✓Color mixer + morph previews
- ✓pH sensitivity warnings
- ✓INCI names for colorants
- ✓AI recipe assistant (unlimited)
- ✓Batch history & logs