Perfume types reflect the concentration of aromatic compounds in a solvent, which in fine fragrance is typically ethanol or a mix of water and ethanol. Various sources differ considerably in the definitions of perfume types. The concentration by percent/volume of perfume oil is as follows:

Eau de Parfum (EDP), Parfum de Toilette (PdT): 10-20% (typical ~15%) aromatic compounds. Sometimes listed as “eau de perfume” or “millésime”.

Eau de Toilette (EDT): 5-15% (typical ~10%) aromatic compounds nEau de Cologne (EDC): Chypre citrus type perfumes with 3-8% (typical ~5%) aromatic compound

Parfum- the version of a perfume that has the highest concentration of fragrance essential oils.