EASI Score Calculator

Score eczema severity with the Eczema Area and Severity Index (EASI) across the head, trunk, upper and lower limbs.

100% FreeNo sign-upPrivate — runs in your browser

Head / neck

Upper limbs

Trunk

Lower limbs

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Result

Total EASI
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Head / neck contribution
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Upper limbs contribution
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Trunk contribution
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Lower limbs contribution
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Severity band
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How to use this tool

1
Choose the age group first

Child multipliers differ from adult ones.

2
Score each region’s area

Estimate the percentage of that region affected and pick the matching area score.

3
Score the four signs per region

Erythema, swelling/papulation, scratch marks and thickening, each 0–3.

4
Read the total and the band

Track the total over time rather than reacting to a single day’s change.

Formula & worked example

For each region: region score = area score × (erythema + oedema/papulation + excoriation + lichenification) × multiplier. Area scores: 0 none, 1 = 1–9%, 2 = 10–29%, 3 = 30–49%, 4 = 50–69%, 5 = 70–89%, 6 = 90–100%. Each sign scores 0–3, so severity sums to 0–12. Adult multipliers: head 0.1, upper limbs 0.2, trunk 0.3, lower limbs 0.4; children under 8: 0.2, 0.2, 0.3, 0.3. Total 0–72. Bands: 0 clear, 0.1–1.0 almost clear, 1.1–7.0 mild, 7.1–21.0 moderate, 21.1–50.0 severe, 50.1–72.0 very severe.

An adult with moderate signs (total severity 6) over 10–29% of the trunk (area 2) contributes 6 × 2 × 0.3 = 3.6 from the trunk alone; with similar trunk-only disease the total is 3.6, mild.

Limitations — read this before you rely on it

Educational scoring aid using the published EASI method. This tool is for education only and is not medical advice, a diagnosis, or a substitute for professional assessment. Sign scoring is subjective and needs training; self-scores are tracking aids, not diagnoses or treatment guides.

Frequently asked questions

The Eczema Area and Severity Index, the standard research and clinical score for atopic dermatitis severity.

Clear, almost clear, mild, moderate, severe and very severe, from the total score ranges.

You can track it, but scoring signs accurately takes practice; clinicians’ scores are the reference for treatment decisions.

A young child’s head is proportionally larger, so it carries more weight in the total.

In trials, a 50% or 75% fall (EASI-50, EASI-75) is commonly used as a meaningful improvement.

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