The Fitzpatrick Scale Explained
What the Fitzpatrick scale is
The Fitzpatrick scale is a way of classifying skin by how it responds to sunlight. It was developed by dermatologist Thomas Fitzpatrick at Harvard in 1975, originally to predict how skin would react to light based treatments.
It sorts skin into six phototypes, from very fair skin that always burns to deeply pigmented skin that rarely burns. It remains one of the most widely used references in dermatology and skincare.
The six skin types
The six Fitzpatrick phototypes are:
- Type I. Very fair skin, often with freckles. Always burns, never tans.
- Type II. Fair skin. Burns easily, tans minimally.
- Type III. Medium skin. Sometimes burns, tans gradually.
- Type IV. Olive or light brown skin. Burns minimally, tans easily.
- Type V. Brown skin. Rarely burns, tans deeply.
- Type VI. Deeply pigmented dark brown to black skin. Very rarely burns.
How it is used
The scale guides several practical decisions:
- Sun protection advice, since burn risk varies by type.
- Treatment settings for lasers, peels and light therapies, where deeper tones need careful parameters.
- Skincare formulation and testing, so products and tools work across the range.
In AI skin analysis, the scale is a benchmark. A trustworthy system reports accuracy across all six types, not just an average. See how accurate skin AI is on dark skin.
Its limits
The Fitzpatrick scale is useful but not complete. It was designed around sun response, not the full picture of skin tone and undertone. Two people classed as the same type can have different undertones and different needs.
It also compresses a huge amount of diversity within types V and VI. That is one reason skincare and skin AI should go beyond a single Fitzpatrick label and read the actual skin in front of them.
How to estimate your Fitzpatrick type
You can estimate your Fitzpatrick type by thinking about how your skin reacts to sun without protection. Ask whether you burn easily, tan gradually, or rarely burn at all, and how quickly any tan develops. Skin that always burns and never tans sits at the top of the scale, while skin that very rarely burns sits at the bottom.
This self assessment is a rough guide, not a precise label. Eye and hair colour, family background and how your skin behaves over a season all feed into it. For skincare choices, your type is a useful starting point, but reading your actual skin and its current concerns matters more than the number.
Fitzpatrick and AI skin analysis
For skin technology, the scale is a fairness test. Measuring accuracy across every type, and weighting toward deeper tones that older systems handled poorly, is how a tool proves it works for everyone. Oyster builds this into its engine as its melanin moat.
Frequently asked
The Fitzpatrick scale is a classification of skin into six phototypes based on how it responds to the sun, from Type I skin that always burns to Type VI deeply pigmented skin that very rarely burns. It was developed by dermatologist Thomas Fitzpatrick in 1975.
The six Fitzpatrick skin types are: Type I, very fair skin that always burns; Type II, fair skin that burns easily; Type III, medium skin that sometimes burns; Type IV, olive to light brown skin that tans easily; Type V, brown skin that rarely burns; and Type VI, deeply pigmented dark brown to black skin that very rarely burns.
The Fitzpatrick scale is used to guide sun protection advice, set safe parameters for treatments like lasers and chemical peels, and benchmark how well skincare products and skin analysis tools perform across different skin tones.
The Fitzpatrick scale was designed around sun response, so it does not fully capture undertone or the wide diversity within deeper skin types. People of the same Fitzpatrick type can have different skincare needs, so it works best alongside a direct read of the skin.
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