Build professional cosmetic formulas — lotion, body butter, emulsifier, preservative & more. Free tool with EU & US compliant ingredients. All percentages must total 100%.
| Ingredient | Function | Solubility | Phase | Weight % | Amount (g) | Remove |
|---|---|---|---|---|---|---|
Search and add ingredients to begin building your formula. Try "Glycerin", "Shea Butter", or "Niacinamide" | ||||||
How to Use the Cosmetic Formulation Calculator
1 — Search Ingredients
Type any ingredient name. The calculator auto-assigns it to the correct phase (A–F) based on solubility — powder, water-soluble, or oil-soluble.
2 — Set Percentages
Adjust the weight % for each ingredient. All must total exactly 100%. The balance indicator shows you exactly how much to add or remove.
3 — Enter Batch Size
Enter your desired batch size in grams, kg, or oz. The calculator instantly computes the exact amount for every ingredient.
4 — Export Your Formula
Download your formula as a CSV file. All ingredients are EU Cosmetics Regulation (EC) No 1223/2009 and US FDA compliant.
Understanding Cosmetic Formula Phases
Water-soluble powders such as Niacinamide, Salicylic Acid, and proteins. Powders must be fully dissolved before other phases are added. Heat water to 70–80°C.
Liquid water-soluble ingredients: Glycerin, Aloe Vera, Hyaluronic Acid, plant extracts.
Oils, butters, waxes, and emulsifiers. Non-polar ingredients cannot mix with water without an emulsifier. Heat to 70–80°C and combine with water phase while both are hot.
Pre-disperse in glycerin before adding. Carbomer requires neutralisation with TEA or NaOH.
Added post-emulsification. Target pH 5.0–6.5 for most skincare products.
Heat-sensitive ingredients added only when the formula has cooled below 40°C.
Frequently Asked Questions
How do I calculate lotion percentages?
Add all ingredients, set weight percentages totalling 100%, enter your batch size — the calculator gives exact gram amounts instantly. Use our free lotion calculator above.
How does the emulsifier calculator work?
Add your emulsifier (e.g. Emulsifying Wax NF) to Phase C. Typical usage is 3–8% depending on total oil content. The calculator warns you if non-polar oils are present without an emulsifier.
How do I use the body butter formulation calculator?
For anhydrous body butter (no water), add all butters and oils to Phase C. No emulsifier is needed. Percentages must still total 100%.
What preservative percentage should I use?
0.5–1.5% depending on the system. Always add in Phase F (cool-down, below 40°C). Our preservative calculator auto-assigns these to the correct phase.
Are all ingredients EU and US compliant?
Yes. The Formula Chemistry database uses only ingredients compliant with EU Cosmetics Regulation (EC) No 1223/2009 and US FDA 21 CFR. Non-database ingredients trigger a compliance advisory.
Formulation Calculator
| Ingredient | Function | Weight % | Amount (g) |
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