EASI Score Calculator (Eczema)

Calculate the EASI Score (Eczema Area and Severity Index) for atopic dermatitis severity assessment. Enter the area of skin affected and lesion intensity scores (erythema, edema/papulation, excoriation, lichenification) for each of the four body regions: Head/Neck, Upper Limbs, Trunk, and Lower Limbs. Your results include the total EASI score and a severity classification from Clear to Very Severe. Also try the Biological Age Calculator.

Disclaimer: This tool 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 any health-related decisions.

Head/Neck — Area of Skin Affected *

Estimate the percentage of head/neck skin affected by eczema.

Head/Neck — Erythema (Redness) *

Head/Neck — Edema / Papulation *

Head/Neck — Excoriation (Scratching) *

Head/Neck — Lichenification (Skin Thickening) *

Upper Limbs — Area of Skin Affected *

Estimate the percentage of upper limb skin affected by eczema.

Upper Limbs — Erythema (Redness) *

Upper Limbs — Edema / Papulation *

Upper Limbs — Excoriation (Scratching) *

Upper Limbs — Lichenification (Skin Thickening) *

Trunk — Area of Skin Affected *

Estimate the percentage of trunk skin affected by eczema.

Trunk — Erythema (Redness) *

Trunk — Edema / Papulation *

Trunk — Excoriation (Scratching) *

Trunk — Lichenification (Skin Thickening) *

Lower Limbs — Area of Skin Affected *

Estimate the percentage of lower limb skin affected by eczema.

Lower Limbs — Erythema (Redness) *

Lower Limbs — Edema / Papulation *

Lower Limbs — Excoriation (Scratching) *

Lower Limbs — Lichenification (Skin Thickening) *

Results

Total EASI Score

Severity Classification

Head/Neck Sub-score

Upper Limbs Sub-score

Trunk Sub-score

Lower Limbs Sub-score

What is an EASI score?

The EASI (Eczema Area and Severity Index) is a validated clinical tool used to measure the severity of atopic dermatitis (eczema). It was originally developed in 1998 and assesses both the extent of skin involvement and the intensity of lesion characteristics across four body regions. Scores range from 0 (clear) to 72 (very severe). See also our calculate Bedridden Patient Height.

Which body regions are assessed in the EASI?

The EASI evaluates four body regions: Head/Neck, Upper Limbs, Trunk, and Lower Limbs. Each region is assessed independently for both the percentage of skin area affected and the intensity of four lesion signs.

What does the area score represent?

The area score is a 7-point scale (0–6) that estimates the percentage of skin within each body region affected by eczema: 0 = 0%, 1 = 1–9%, 2 = 10–29%, 3 = 30–49%, 4 = 50–69%, 5 = 70–89%, and 6 = 90–100%.

What are the four signs of eczema scored in the EASI severity assessment?

The four lesion intensity signs are: Erythema (redness), Edema/Papulation (swelling/raised skin), Excoriation (scratch marks), and Lichenification (skin thickening/leathery texture). Each is scored 0 (none), 1 (mild), 2 (moderate), or 3 (severe).

How is the EASI score calculated?

Each body region score is calculated as: (sum of 4 severity signs) × area score × regional body surface area multiplier. The multipliers are 0.1 for Head/Neck, 0.2 for Upper Limbs, 0.3 for Trunk, and 0.4 for Lower Limbs. The four regional scores are then summed for the total EASI score (0–72).

What do the EASI score ranges mean?

EASI scores are interpreted as: 0 = Clear, 0.1–1.0 = Almost Clear, 1.1–7.0 = Mild, 7.1–21.0 = Moderate, 21.1–50.0 = Severe, and 50.1–72.0 = Very Severe atopic dermatitis.

Who administers the EASI assessment?

The EASI is a clinician-administered tool, typically completed by a dermatologist or trained healthcare professional. It is widely used in clinical trials, research settings, and routine clinical practice to monitor treatment response and track disease progression over time.

Can the EASI score be used to monitor treatment progress?

Yes. The EASI is a validated outcome measure frequently used in clinical trials to assess treatment response. A meaningful clinical improvement is often defined as a 50% or greater reduction in EASI score (EASI-50), and some trials use EASI-75 or EASI-90 as more stringent benchmarks.