Sunscreen Formula SPF/PA Calculation

Thank you for providing your sunscreen formula. Regarding the exact SPF (Sun Protection Factor) and PA (Protection Grade of UVA) values for your specific formulation, these values cannot be precisely calculated based solely on the ingredients and their percentages.

SPF and PA values are determined through standardized laboratory testing of the final product. Many factors in the formula influence these values, including the specific type and concentration of UV filters, the overall formulation base (like emulsion type), and the manufacturing process.

However, your formula is very similar to an example formula provided for Titanium Dioxide Transparent (15nm, Dimethicone Coated), which is designed to use this ingredient as the primary sunscreen. This example formula also includes SPF Protect Ultra™ II at 5% and is described as a water-in-oil emulsion system intended to achieve a high SPF value.

For a precise measurement of your formula's SPF and PA, you may be interested to know that the company offers a free SPF measurement service for formulas that utilize SPF Protect Ultra™ II. You can contact customer service for more details on how to submit your formula for testing.