EASI Calculator (Eczema Area and Severity Index)
Calculate the severity of atopic dermatitis based on 4 body regions.
Head & Neck
Multiplier: 0.1
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 (0%)
1 (1-9%)
2 (10-29%)
3 (30-49%)
4 (50-69%)
5 (70-89%)
6 (90-100%)
Upper Limbs
Multiplier: 0.2
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 (0%)
1 (1-9%)
2 (10-29%)
3 (30-49%)
4 (50-69%)
5 (70-89%)
6 (90-100%)
Trunk
Multiplier: 0.3
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 (0%)
1 (1-9%)
2 (10-29%)
3 (30-49%)
4 (50-69%)
5 (70-89%)
6 (90-100%)
Lower Limbs
Multiplier: 0.4
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 – None
1 – Mild
2 – Moderate
3 – Severe
0 (0%)
1 (1-9%)
2 (10-29%)
3 (30-49%)
4 (50-69%)
5 (70-89%)
6 (90-100%)
EASI Score
0.0
Clear
Understanding the EASI Score
The EASI (Eczema Area and Severity Index) is a standardized clinical tool used to measure the extent and severity of atopic dermatitis (eczema). It is widely used in clinical trials and dermatology practices to monitor patient progress and the effectiveness of treatments.
How is EASI Calculated?
The EASI score assesses four distinct body regions. For each region, the calculator assigns a score based on the intensity of four key signs of eczema and the percentage of skin area affected.
| Body Region | Weight (Multiplier) |
|---|---|
| Head & Neck | 0.1 (10%) |
| Upper Limbs | 0.2 (20%) |
| Trunk | 0.3 (30%) |
| Lower Limbs | 0.4 (40%) |
For each region, the calculation follows this formula:
(Redness + Thickness + Scratching + Lichenification) × Area Score × Multiplier
The maximum possible EASI score is 72.0, indicating the most severe condition covering 100% of the body.
Interpreting Your Score
While clinical interpretation may vary slightly, the following ranges are generally used to classify severity:
- 0.0: 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
Symptoms Graded
The calculator evaluates four specific signs on a scale of 0 (None) to 3 (Severe):
- Erythema: Redness of the skin.
- Induration/Papulation: Thickness or swelling.
- Excoriation: Scratch marks.
- Lichenification: Thickening of the skin with accentuated skin lines (leathery appearance).