AI-assisted formulation
Turn a written brief or a set of parameters into a structured formula with a defined top, heart, and base. Use it to break through a blank page, not to skip evaluation.
Open the AI LabScentenaAI Perfume Formula Generator
Generate a structured perfume formula by theme, concentration, and composition method, with IFRA-aware screening and gram weights calculated for your batch. Free to use, no account required.
Parameters
Define your brief and method
Current: 20%
Formula
No formula yet. Generate to begin.
Set parameters then click Generate.
What Scentena does
Scentena is a browser-based perfume formulation workspace. It handles the parts of composition that are mechanical — proposing a balanced structure, normalising percentages, converting to gram weights, and surfacing available screening flags — so your attention stays on the part that cannot be automated: what the trial actually smells like.
Accord and formula building
Work at the material level. Add ingredients or a tested accord, rebalance proportions, and keep the relationship between concentrate and finished product visible throughout.
Open the builderPercentages and gram weights
Every formula normalises to 100 parts and converts to gram targets for your chosen batch size and oil concentration, so a trial can be weighed directly from the screen.
How the maths worksIFRA-aware screening
Where material data is available, Scentena applies stored caps and flags a dose that needs review. This is a screening aid that makes safety questions visible early — not certification.
Understand IFRA StandardsHow it works
A single pass through the tool produces a formula you can weigh the same afternoon. The value comes from repeating the loop and keeping records of what each change did.
- Step 1
Describe the scent
Choose a theme, concentration, style, and composition method — or write a brief in your own words in the AI Lab.
- Step 2
Generate a starting structure
Scentena proposes materials across the evaporation curve, normalises the concentrate, and calculates gram weights for your batch.
- Step 3
Adjust and rebuild
Swap materials in the builder, push toward longevity or projection, and compare how each edit changes the balance.
- Step 4
Weigh, smell, and revise
Make a small trial, evaluate it on blotter over several hours, record what you observe, and bring the evidence back into the next version.
Who Scentena is for
Hobbyists and beginners
Learn the vocabulary and the arithmetic at the same time, with a formula you can actually weigh instead of an abstract explanation.
Fragrance students
Practise structured methods such as Jean Carles, study how materials behave in a tier, and keep versioned records of every trial.
Independent perfumers
Move quickly from concept to a documented starting formula, then apply your own bench work, supplier data, and safety review.
Small creative teams
Share a common structure and consistent percentage maths so that a formula is legible to everyone who works on it.
Scentena is a creative and educational tool. It is not a laboratory, a safety assessor, or a regulatory consultant. Before you manufacture, wear, gift, or sell a formula, you remain responsible for confirming material identity, current supplier documentation and IFRA Standards, any required safety assessment, and the law in your market.
Educational resources
Practical guides to fragrance structure, materials, accords, and performance — written to be useful on their own, whether or not you use the generator.
Beginner's Guide to Perfume Formulation
Learn a practical perfume-formulation workflow, from writing a scent brief and choosing materials to weighing trials, evaluating blotters, and revising a formula.
Top, Middle and Base Notes Explained
Understand top, middle, and base notes as an evaporation framework, how the layers overlap, and how to build smoother transitions in a perfume formula.
Understanding IFRA Standards
A practical introduction to IFRA Standards, product categories, maximum acceptable concentrations, supplier certificates, amendments, and the limits of software checks.
Start with a formula, not a blank page
Generating, adjusting, and exporting a formula is free and needs no account. Create one only when you want to save your work to a private library.
Perfumery guide
How to read and use your generated formula
Scentena builds a balanced perfume formula from a short brief — theme, concentration, gender, and composition method — then scales every material to gram weights for your batch size. Here is what the numbers mean and how to turn them into a wearable scent.
Concentration: EDT, EDP, and Parfum
A finished fragrance is a perfume oil concentrate diluted in perfumer's alcohol. The concentration is the share of that oil in the bottle, and it is the single biggest driver of how strong and long-lasting the result feels.
The generator uses your selected type as the default oil percentage, which you can override. As a rule of thumb:
- Eau de Toilette (EDT): roughly 8–15% oil — lighter, brighter, shorter wear, good for citrus and fresh themes.
- Eau de Parfum (EDP): roughly 15–20% oil — the most common modern strength, balanced longevity and projection.
- Parfum / Extrait: roughly 20–30%+ oil — rich and long-lasting, best for amber, woody, and gourmand themes.
The fragrance pyramid: top, heart, and base notes
Every material in your formula is classified as a top, heart, or base note based on how quickly it evaporates (its volatility). Together they form the classic fragrance pyramid, and a pleasant scent usually needs all three tiers.
Top notes are the first impression — citrus, aldehydes, and light aromatics that flash off within minutes. Heart notes are the body of the fragrance, typically florals and spices that carry the theme for a few hours. Base notes are the foundation — woods, ambers, resins, and musks that fix the blend and linger for hours or days.
The note split shown alongside your formula tells you how the composition is weighted. If the top is very high the scent will be loud but fleeting; if the base dominates it will be quiet at first and bloom slowly on skin.
IFRA-aware screening
Many aroma materials are restricted by the International Fragrance Association (IFRA), including for sensitization concerns at particular exposures. Where a material has a stored reference limit, Scentena estimates its finished-product dose and flags a result that needs review.
Treat every flag and stored limit as an incomplete screening aid rather than certification or a safety decision. Standards, product categories, material composition, supplier data, and laws change — confirm the exact material against current official and supplier documents and obtain any assessment required for the intended product and market.
From formula to bottle
The gram column is a calculated trial target for your chosen batch size and concentration. Before weighing, verify every material's identity, dilution, supplier instructions, handling requirements, and current restrictions; use appropriate training, protective equipment, ventilation, and a suitable scale. Start with a small evaluation trial rather than treating generated output as a production recipe.
Maturation matters: most blends are sharp and disjointed for the first day or two and only settle into their intended character after one to four weeks of resting in a cool, dark place.
Frequently asked questions
- What is the Jean Carles method?
- It is a classic training approach to perfume composition that builds a fragrance methodically from its base accord upward, learning each material's behavior in isolation before combining. Scentena uses it as one of several composition strategies that weight the top, heart, and base tiers differently.
- What do the gram weights represent?
- They are mathematical trial targets derived from batch size and oil concentration, not a declaration that the formula is safe or compliant. Verify the exact materials and documentation, correct any warnings, and use an appropriately controlled small-trial process before weighing.
- Do I need an account to generate a formula?
- No. Generating, optimizing, and exporting formulas is free and requires no sign-in. An account only adds the ability to save formulas to your library across devices.
- Can I trust the IFRA limits shown?
- No. They are screening estimates based on the data available to the application, not a safety assessment or regulatory certification. Verify the exact material against current official IFRA Standards, supplier documents, product category, constituent contributions, and applicable law.