What Is a Perfume Concentration Calculator?
Perfume strength names like Eau de Toilette or Eau de Parfum describe how concentrated the fragrance oil is relative to the carrier (usually perfumer's alcohol). This calculator takes your fragrance oil and carrier volumes and calculates the exact percentage, then classifies it into the standard industry category.
It's useful for DIY perfume blending, understanding a commercial fragrance's likely staying power, or scaling a formula up or down while keeping the same strength.
How to Read Your Results
Fragrance Concentration
The percentage of your finished blend that is pure fragrance oil — the single number that determines strength, longevity, and typically price.
Perfume Category
The standard industry classification your concentration falls into, from Eau Fraiche at the lightest end up to Parfum/Extrait at the most concentrated.
Total Blend Volume
The combined finished volume of your blend, useful for choosing the right size bottle.
Real-World Example
You blend 15 mL of fragrance oil with 85 mL of perfumer's alcohol.
| Value | Result |
|---|---|
| Total volume (15 + 85) | 100 mL |
| Concentration (15 ÷ 100 × 100) | 15.0% |
| Category | Eau de Parfum |
At 15%, this blend sits right at the boundary between Eau de Toilette and Eau de Parfum strength — a popular, long-lasting sweet spot for everyday fragrances.
Tips for Blending Perfume
- Let a new blend rest for 2–4 weeks before final judgment — scent evolves as ingredients meld.
- Higher concentration isn't automatically "better" — some notes are overpowering at high strength.
- Use perfumer's alcohol (high-proof, denatured) rather than rubbing alcohol for the cleanest scent profile.
- Keep records of your ratios so a favorite blend can be reproduced exactly later.
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Last updated: August 2026 · Reviewed by: Simple Calculator Tools Editorial Team