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The Apothecary Os

Formulation tool

The Formulation Calculator

Pick a product, choose your water phase, set your batch size. Get exact gram measurements, kitchen equivalents, and the full phase-by-phase recipe — no guesswork.

Step 1 — Choose your product

1Choose Your Product

Lip Balm and Body Butter are free to try. Start your free 7-day trial (no card needed) to open the rest of the Starter recipes.

Step 2 — Water phase

2What Are You Adding to Your Formula?

No water ingredients — anhydrous formula. No preservative needed. Shelf stable 12–24 months.

Step 3 — Batch size

3How Many Ounces Do You Want to Make?
oz= 226.8g total
Quick pick:
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Choose what you're making, select your water ingredient (or none), and enter your batch size. Your full ingredient list appears instantly.

A starting point, not a tested product. Patch-test, and test before you sell. Details
  • Calculated from typical ingredient data. Suppliers' materials vary.
  • Anything you sell needs stability testing; anything with water needs a preservative and, ideally, a challenge test.
  • Keep label claims cosmetic: how it looks, feels and smells.
  • You're responsible for the safety, labeling and legal compliance of what you make. See the compliance hub and terms.