SCORAD Calculator
Calculate the SCORing Atopic Dermatitis (SCORAD) index to assess eczema severity based on extent, intensity, and subjective symptoms.
About this calculator
SCORAD (SCORing Atopic Dermatitis) is a composite severity index for eczema introduced in 1993 by the European Task Force on Atopic Dermatitis, combining three components into one score: SCORAD = A/5 + 7B/2 + C. "A" is the extent -- the percentage of body surface area affected, scored 0 to 100. "B" is intensity -- the sum of six signs (erythema, edema/ papulation, oozing/crusting, excoriation, lichenification, and dryness), each graded 0 (none) to 3 (severe), for a maximum intensity sum of 18. "C" is the subjective score -- average itch (pruritus) and average sleep loss over the preceding three days, each rated 0 to 10 on a visual analog scale, for a maximum of 20. Because the extent term is divided by 5 and the intensity term is multiplied by 3.5 (7/2), the six intensity signs collectively carry far more weight per point than a single percentage point of body-surface extent -- the formula's weighting reflects that widespread but very mild eczema and localized but intense eczema are clinically different situations. Total SCORAD ranges from 0 to 103 and is conventionally classified as mild below 25, moderate from 25 to 50, and severe above 50.
This calculator also reports "objective SCORAD," which is the same formula with the subjective component (C) dropped entirely -- useful when a clinician wants a score that does not depend on patient-reported symptoms, ranging 0 to 83. Because objective SCORAD excludes C by definition, changing pruritus or sleep-loss ratings never changes it, only the full SCORAD score that includes them.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
SCORAD Score
23
Figures current as of 1993. Source: European Task Force on Atopic Dermatitis. Severity scoring of atopic dermatitis: the SCORAD index: consensus report of the European Task Force on Atopic Dermatitis. Dermatology. 1993;186(1):23-31.
How to Use This Calculator
- Enter the Affected BSA (%) using the rule of nines or palm method.
- Score each of the six intensity items (Erythema, Edema, Oozing, Excoriation, Lichenification, Dryness) from 0 to 3.
- Enter Pruritus (Itch) and Sleep Loss scores on a 0-10 visual analog scale.
- The SCORAD index is calculated automatically — below 25 is mild, 25-50 moderate, above 50 severe.
- Use serial SCORAD scores to track atopic dermatitis response to therapy.
How the result changes with Pruritus (Itch)
| Pruritus (Itch) | SCORAD Score |
|---|---|
| 2 | 21 |
| 3 | 22 |
| 6 | 25 |
| 10 | 29 |
What each input means
- Affected BSA
- Percentage of body surface area affected.
- Erythema
- Redness intensity in the affected areas.
- Edema/Papulation
- Swelling/papulation intensity.
- Oozing/Crusts
- Weeping/crusting intensity.
- Excoriation
- Scratch-mark intensity.
- Lichenification
- Skin-thickening intensity.
- Dryness
- Dryness in uninvolved (non-lesional) skin.
- Pruritus (Itch)
- Average itch last 3 days: 0–10.
- Sleep Loss
- Sleep disturbance last 3 nights: 0–10.
What each result means
- SCORAD Score
- Total SCORAD (0–103).
- Objective SCORAD
- Without subjective symptoms (0–83).
- Severity
- 1=mild (<25), 2=moderate (25–50), 3=severe (>50).
- Raw Intensity Sum
- Sum of 6 intensity items (0–18).
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersAffected BSA = 15, Erythema = 1, Edema/Papulation = 1, Oozing/Crusts = 0 = 9 input(s) provided
- Calculate SCORAD ScoreSCORAD Score = (extent / 5) + (7 * intensityScore / 2) + subjectiveScore23 = 23
- Calculate Objective SCORADObjective SCORAD = (extent / 5) + (7 * intensityScore / 2)17 = 17
- Calculate Severity1 = 1
Figures and sources
- SCORAD (SCORing Atopic Dermatitis) index (1993) — European Task Force on Atopic Dermatitis. Severity scoring of atopic dermatitis: the SCORAD index: consensus report of the European Task Force on Atopic Dermatitis. Dermatology. 1993;186(1):23-31.
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
What is the difference between SCORAD and objective SCORAD?
Objective SCORAD drops the subjective component (C) entirely -- it is just A/5 + 7B/2, based only on the clinician-assessed extent and intensity signs, with a maximum of 83 rather than 103. It exists so severity can be tracked without relying on the patient's own itch and sleep-loss ratings, which can vary in how consistently different patients report them. Full SCORAD adds those subjective ratings back in for a fuller picture of the patient's experience.
Why does the intensity score carry so much more weight than the extent percentage?
The formula divides the extent term (A) by 5 but multiplies the intensity term (B) by 3.5 (7 divided by 2) -- so each point of the 0-18 intensity sum contributes far more to the total than each percentage point of body-surface extent. That weighting is intentional: a small area of intense, weeping, lichenified eczema can represent worse disease than a large area of very mild redness, and the formula's coefficients reflect that clinical judgment.
What SCORAD score counts as mild, moderate, or severe eczema?
The traditional classification used with SCORAD is mild below 25, moderate from 25 up to 50, and severe above 50, out of a maximum possible score of 103. Some more recent interpretability studies have proposed refined severity bands, so treat these traditional cutoffs as the widely used convention rather than the only classification system in the dermatology literature.
Does rating pruritus (itch) higher change the objective SCORAD result?
No -- objective SCORAD is defined specifically to exclude the subjective component, so pruritus and sleep-loss ratings never move it, by definition. They only affect the full SCORAD score (which adds the subjective component C back in). If a clinician wants a severity measure unaffected by patient-reported symptoms, objective SCORAD is the number to track over time.
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