EASI Score Calculator
Assess eczema severity with the validated Eczema Area and Severity Index.
About the EASI score
The Eczema Area and Severity Index, commonly called EASI, is a structured clinical measure for describing the extent and intensity of atopic dermatitis. It combines observations from four body regions: the head and neck, upper limbs, trunk, and lower limbs. Within every region, the assessor grades erythema, edema or papulation, excoriation, and lichenification from zero to three. Zero means that a sign is absent, while three indicates severe expression. The percentage of skin affected in each region is converted to an area grade from zero to six. The calculator adds the four sign grades in each region, multiplies that total by the area grade, and then applies the region's standard weighting. Head and neck contribute 10 percent, upper limbs 20 percent, trunk 30 percent, and lower limbs 40 percent. The weighted regional values are added to produce a score from 0 to 72. A higher value reflects more extensive or intense eczema, but the number should always be considered alongside symptoms, history, quality of life, infection, treatment response, and a clinician's examination. Consistent scoring matters more than false precision. Examine the same anatomical boundaries each time, estimate only skin currently showing eczema, and grade each sign independently. Area percentages are translated as follows: no involvement scores zero; 1 to 9 percent scores one; 10 to 29 scores two; 30 to 49 scores three; 50 to 69 scores four; 70 to 89 scores five; and 90 to 100 scores six. Hair, skin tone, lighting, scratching, and recent topical treatment can influence visual assessment. EASI is widely used in clinical trials and specialist practice to monitor change over time. It is not a self-diagnosis tool and does not determine a treatment by itself. An apparently low score can coexist with major itch, sleep loss, facial involvement, or hand disease. Seek qualified medical advice for a new rash, rapidly worsening inflammation, pain, fever, weeping, crusting, or suspected infection. Use this result as an organized record for discussion, not as a substitute for professional evaluation.
EASI score examples
| Assessment | Score |
|---|---|
| No signs and no affected area in any region | 0.0 |
| Head signs total 6 with 25% area; other regions clear | 1.2 |
| All signs severe and 100% area in every region | 72.0 |
How to calculate EASI
- Examine each of the four body regions under consistent lighting.
- Grade erythema, edema or papulation, excoriation, and lichenification from 0 to 3.
- Estimate the current eczema area as a percentage of each region.
- Enter every grade and percentage, then select Calculate EASI Score.
- Record the result and compare serial scores with clinical guidance.
Frequently asked questions
What is a normal EASI score?
A score of zero means no observable EASI signs or affected area. There is no single normal value for someone with diagnosed eczema because severity and treatment goals are individual.
What is the maximum EASI score?
The maximum score is 72 when every sign is severe and every region is fully affected. The minimum is zero.
Can I use EASI to diagnose eczema?
No, EASI measures severity after clinical assessment and is not a diagnostic test. A clinician should evaluate an uncertain or new skin condition.
How is affected area converted?
The percentage is grouped into an area grade from zero through six. This prevents small estimation differences from creating excessive score changes.
How often should EASI be repeated?
Repeat timing depends on the clinical or research purpose. Using the same assessor and method at planned visits improves comparability.