Eau de parfum is 15–25% fragrance oil in Perfume Base. At 25%, one gallon is 96 oz base and 32 oz fragrance oil.
Start at 15% and test clarity at each step up. Body mist in this base runs 5–10%. Fragrance oil comes in 1 oz, 4 oz, and 16 oz; Oil to buy is the smallest bottle that covers the batch. Step by step: Perfume how-to. Other sizes