When you see EDT or EDP on a bottle, you're looking at the concentration of fragrance oil in the formula. That single variable determines how a fragrance opens, how far it projects, and how long it lasts on skin. Here's what each designation means and how to choose between them.
The Concentration Types
Eau de Cologne (EDC)
Fragrance oil concentration: 2–4%. The lightest formulation. EDC opens with a strong initial impression that fades quickly — typically one to two hours on skin. Best suited for warm weather or situations where a light, refreshing presence is the goal. Rarely used for complex oriental or floral compositions; most common in fresh, citrus-forward fragrances.
Eau de Toilette (EDT)
Fragrance oil concentration: 5–15%. The most widely produced concentration. EDT projects moderately and typically lasts three to five hours on skin — longer on well-hydrated skin, shorter in dry or warm conditions. The lighter oil load means top notes are more prominent and the dry-down is often crisper than the EDP version of the same fragrance. Well suited for daytime wear, warmer weather, and environments where moderate presence is appropriate.
Eau de Parfum (EDP)
Fragrance oil concentration: 15–20%. Richer and longer-lasting than EDT, typically five to eight hours on skin — again subject to skin chemistry and conditions. The higher oil concentration means heart and base notes are more prominent from the opening — the dry-down is fuller and the projection is stronger. Better suited for evening wear, cooler weather, or situations where longevity matters. When the same fragrance is available in both EDT and EDP, the EDP will often read warmer and denser.
Parfum (Extrait de Parfum)
Fragrance oil concentration: 20–40%. The most concentrated formulation. Parfum is applied in small amounts — typically to pulse points — and can last eight hours or more on skin. Projection is intimate rather than broad; parfum is designed to be discovered up close rather than announced from a distance. The highest fidelity to the perfumer's original composition.
Projection
Projection refers to how far a fragrance radiates from the skin. It is related to but not identical to concentration — a high-concentration parfum may project less than a well-constructed EDP because the formula is designed for skin-close wear. The composition itself — particularly the volatility of the top and heart notes — also affects projection independently of concentration.
As a general rule: EDC and EDT project lightly to moderately. EDP projects more broadly. Parfum projects intimately despite its concentration.
How to Choose
By season
Warmer months favor lighter concentrations — heat amplifies projection, so EDT in summer can perform closer to EDP in winter. Cooler months support heavier concentrations; the cold suppresses projection, and EDP or parfum compensates.
By occasion
For daytime, office, or casual wear, EDT offers appropriate presence without overstatement. For evening, formal, or extended wear, EDP or parfum provides the longevity and depth the occasion calls for. In warm weather or active settings, EDC or EDT keeps projection measured.
By preference
If you want to be aware of your fragrance throughout the day without others noticing it strongly, EDT. If you want presence and longevity without reapplication, EDP. If you want the fragrance to be yours alone — intimate, close, long-lasting — parfum.
When the same fragrance is available in multiple concentrations
Try both if possible. The EDT and EDP of the same fragrance are not identical — the concentration changes the balance of the note pyramid, and what reads as a fresh floral EDT may read as a warmer, richer oriental in EDP. Neither is more correct; they are different expressions of the same composition.
A note on longevity
Longevity figures are averages. Dry skin tends to absorb fragrance faster than oily or well-moisturized skin. Pulse points — wrists, neck, inner elbow — project more than other areas. Applying over an unscented moisturizer extends longevity across all concentration types. These variables apply regardless of concentration and will affect any formulation.
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