Cosmetic formula calculators
Calculate one ingredient's concentration, scale an entire percentage formula, or check the finished-product level of a fragrance allergen.
Percentage formula and batch scaler
Enter a target batch weight and ingredient percentages. The worksheet calculates weights and checks whether the formula totals 100%.
Fragrance allergen threshold calculator
Calculate the allergen concentration contributed by a fragrance or raw-material blend in the finished cosmetic product.
Formula: blend use % × allergen content % ÷ 100. The thresholds are the general Annex III declaration thresholds; always check the exact entry and transition conditions. European Commission guidance.
How it works
The concentration is calculated as: (ingredient ÷ total) × 100. Results update in real time as you type.
For the regulatory maximum, open any restricted substance from Annex III or V and copy the applicable numeric value from the Max Concentration field. Some records contain several product-specific limits, so select the condition that matches the finished product.
All calculations are for screening and formulation planning. They do not determine legal compliance on their own.