SCORAD Calculator (SCORing Atopic Dermatitis index)

Understanding the SCORAD calculator — concept and principle

SCORAD (SCORing Atopic Dermatitis) measures the severity of eczema by combining how much skin is affected, how intense the signs are and how much itch and sleep loss the person reports. Dermatologists use it to grade severity and follow treatment.

Area + intensity + symptoms: with the default inputs the result is 47.5 (+ itch 6 + sleep 4 · moderate).

How it is calculated

SCORAD = A ÷ 5 + 7B ÷ 2 + C

A: extent, % of body surface affected (0–100), estimated with the rule of nines.
B: sum of six intensity signs graded 0–3 on a typical area: redness, swelling/bumps, oozing/crusts, scratch marks, thickened skin and dryness of uninvolved skin (0–18).
C: itch plus sleep loss over the last 3 days, each 0–10 (0–20).

Objective SCORAD = A ÷ 5 + 7B ÷ 2 (0–83). Total 0–103.

Grades: below 25 mild, 25–50 moderate, above 50 severe.

The principle

The European Task Force on Atopic Dermatitis designed SCORAD in 1993 to capture three aspects of eczema in one number. The weights make intensity count most (up to 63 points), extent up to 20 and the patient's own symptoms up to 20. Including itch and sleep reflects what matters most to patients, while the objective version allows comparison without subjective ratings.

Worked example

Default inputs: area 30%; redness 2, swelling 1, oozing 1, scratching 2, thickening 1, dryness 2; itch 6, sleep loss 4.

A ÷ 5 = 30 ÷ 5 = 6.
B = 2 + 1 + 1 + 2 + 1 + 2 = 9; 7 × 9 ÷ 2 = 31.5.
Objective SCORAD = 6 + 31.5 = 37.5.
SCORAD = 37.5 + 6 + 4 = 47.5 → Moderate (25–50).

Each point is the calculator re-run with only “A. Skin area affected (% of body, rule of nines)” changed; the gold point is the default example. Change the inputs above and this chart follows your numbers.

A. Skin area affected (% of body, rule of nines)	SCORAD (0–103)
7.5	43
15	44.5
22.5	46
30	47.5
37.5	49
45	50.5
60	53.5

How to read the result

Where does your result fall?

Scores help track whether treatment is working: a fall of several points over weeks is meaningful. Severity grades guide treatment intensity, from emollients and topical treatment for mild disease to systemic options for severe disease, decided with a doctor.

Common mistakes

Grading intensity on the worst patch instead of a typical one.
Including uninvolved dry skin in the extent.
Rating itch over the last day instead of the last three days.

Keep in mind: SCORAD is a clinical scoring tool, not a diagnosis. Discuss eczema treatment with a doctor or dermatologist.

Frequently asked questions

What is the difference between SCORAD and EASI?

SCORAD includes the patient's itch and sleep loss and uses the rule of nines; EASI scores four body regions without patient symptoms.

What SCORAD score is severe?

Above 50.

Why does dryness count only on uninvolved skin?

Because dryness under inflamed areas is already reflected in the other signs.

Sources: European Task Force on Atopic Dermatitis, "Severity scoring of atopic dermatitis: the SCORAD index", Dermatology 1993;186(1):23–31

Checked 9 Nov 2026. European Task Force on Atopic Dermatitis, “Severity scoring of atopic dermatitis: the SCORAD index. Consensus Report”, Dermatology 1993;186(1):23–31; components, ranges and severity grades as recorded in the openEHR Clinical Knowledge Manager archetype “SCORAD index” (openEHR-EHR-OBSERVATION.scorad_index.v0).

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