EASI is the recommended outcome measure for eczema clinical trials and is used to judge eligibility for systemic and biologic treatments. A 75% improvement (EASI-75) is a common treatment goal.
How to use the EASI Score Calculator
- Age group
- Head and neck – erythema (0–3)
- Head and neck – oedema/papulation (0–3)
- Head and neck – excoriation (0–3)
- Head and neck – lichenification (0–3)
- Head and neck – area affected
- Upper limbs – erythema (0–3)
- Upper limbs – oedema/papulation (0–3)
- Upper limbs – excoriation (0–3)
- Upper limbs – lichenification (0–3)
- Upper limbs – area affected
- Trunk – erythema (0–3)
- Trunk – oedema/papulation (0–3)
- Trunk – excoriation (0–3)
- Trunk – lichenification (0–3)
- Trunk – area affected
- Lower limbs – erythema (0–3)
- Lower limbs – oedema/papulation (0–3)
- Lower limbs – excoriation (0–3)
- Lower limbs – lichenification (0–3)
- Lower limbs – area affected
Results update as you type, and every field accepts the units shown in its menu.
How it works
For each region rate the four signs from 0 (none) to 3 (severe) – half points are allowed – and choose the percentage of the region affected.
Inputs explained
| Field | What to enter |
|---|---|
| Age group | Choose one: 8 years or older, Under 8 years |
| Head and neck – erythema (0–3) | A number |
| Head and neck – oedema/papulation (0–3) | A number |
| Head and neck – excoriation (0–3) | A number |
| Head and neck – lichenification (0–3) | A number |
| Head and neck – area affected | Choose one: 0% (none), 1–9%, 10–29%, 30–49% … |
| Upper limbs – erythema (0–3) | A number |
| Upper limbs – oedema/papulation (0–3) | A number |
| Upper limbs – excoriation (0–3) | A number |
| Upper limbs – lichenification (0–3) | A number |
| Upper limbs – area affected | Choose one: 0% (none), 1–9%, 10–29%, 30–49% … |
| Trunk – erythema (0–3) | A number |
| Trunk – oedema/papulation (0–3) | A number |
| Trunk – excoriation (0–3) | A number |
| Trunk – lichenification (0–3) | A number |
| Trunk – area affected | Choose one: 0% (none), 1–9%, 10–29%, 30–49% … |
| Lower limbs – erythema (0–3) | A number |
| Lower limbs – oedema/papulation (0–3) | A number |
| Lower limbs – excoriation (0–3) | A number |
| Lower limbs – lichenification (0–3) | A number |
| Lower limbs – area affected | Choose one: 0% (none), 1–9%, 10–29%, 30–49% … |
Example values
How the main result changes when Head and neck – erythema changes and everything else stays at the example values above:
| Head and neck – erythema (0–3) | EASI score (/ 72) |
|---|---|
| 0.5 | 5.9 |
| 0.75 | 6 |
| 1 | 6 |
| 1.25 | 6.1 |
| 1.5 | 6.1 |
| 2 | 6.2 |
Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.
Formula
Region score = (erythema + oedema/papulation + excoriation + lichenification) × area score × region weight
Weights (age 8+): head 0.1, upper limbs 0.2, trunk 0.3, lower limbs 0.4 (under 8: head 0.2, lower limbs 0.3)
EASI = sum of the four regions (0–72)
Worked example
Inputs — Age group: 8 years or older; Head and neck – erythema (0–3): 1; Head and neck – oedema/papulation (0–3): 1; Head and neck – excoriation (0–3): 1; Head and neck – lichenification (0–3): 0; Head and neck – area affected: 10–29%; Upper limbs – erythema (0–3): 1; Upper limbs – oedema/papulation (0–3): 1; Upper limbs – excoriation (0–3): 1; Upper limbs – lichenification (0–3): 0; Upper limbs – area affected: 10–29%; Trunk – erythema (0–3): 1; Trunk – oedema/papulation (0–3): 1; Trunk – excoriation (0–3): 1; Trunk – lichenification (0–3): 0; Trunk – area affected: 10–29%; Lower limbs – erythema (0–3): 1; Lower limbs – oedema/papulation (0–3): 1; Lower limbs – excoriation (0–3): 1; Lower limbs – lichenification (0–3): 0; Lower limbs – area affected: 10–29%.
Results — EASI score = 6 / 72; Severity = Mild.
Key terms
- Lichenification
- Thickened, leathery skin from chronic scratching.
Frequently asked questions
What EASI score is severe eczema?
21.1–50 is severe; above 50 very severe.
What is EASI-75?
A 75% reduction from baseline, a common treatment goal.
How is EASI different from SCORAD?
SCORAD also includes itch and sleep loss reported by the patient.