Fragrance Dosage Calculator

Effective Loading is computed as the minimum of your desired percentage and the IFRA category maximum looked up from Product Type (line 36). When Desired Fragrance exceeds that ceiling — for example 5% in a body-lotion category capped at 3% — the calculator keeps the legal cap and sets Over IFRA Limit to yes (line 37) while still using the capped value for all weight and cost outputs.

Product Type maps to one of six hard-coded IFRA maxima in a lookup table — 0.1% for category 1 through 15% for category 6 (lines 26-35). That single percentage becomes IFRA Max (%) and feeds directly into Effective Loading (line 36), which in turn drives Fragrance Needed (g) and every note-weight output (lines 40-47). Changing category without changing batch size can therefore shift grams and cost even when your desired percentage stays the same.

No — note percentages only partition the fragrance weight already fixed by batch size and effective loading. Base Note (%) is calculated as 100 minus top minus middle (lines 43-44), and top, middle, and base gram outputs each take their share of Fragrance Needed (g) (lines 45-47). Raising top notes redistributes grams among tiers but leaves total fragrance weight and cost unchanged.

The engine first multiplies Fragrance Needed (g) by your Fragrance Cost ($/g) entry to get total fragrance cost for the batch (line 50), then divides that cost by batch size in grams and multiplies by 1,000 to express dollars per kilogram of finished product (line 51). Batch size therefore scales total fragrance grams but cancels out of the per-kilogram figure when loading percentage and unit price stay constant.