PASI Calculator

Calculate Psoriasis Area Severity Index (PASI) score online with detailed breakdown and interpretation

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About This Tool

The PASI Calculator is a professional dermatology tool for calculating the Psoriasis Area Severity Index score, which is the gold standard for measuring psoriasis severity in clinical practice. This tool allows healthcare professionals and patients to assess psoriasis by evaluating four body regions (head, trunk, upper limbs, lower limbs) for both affected area percentage and severity of redness, thickness, and scaling. The calculator provides a comprehensive PASI score from 0 to 72, along with detailed breakdown by body region and severity interpretation. All calculations are performed client-side for privacy and instant results.

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How to Use

For each body region (head, trunk, upper limbs, lower limbs), select the percentage of affected area (0-100%)
For each region, rate the severity of three symptoms on a scale of 0-4: redness (erythema), thickness (induration), and scaling (desquamation)
Click the 'Calculate PASI Score' button to compute your results
View your total PASI score (0-
with detailed breakdown by body region
Check the interpretation section to understand what your score means clinically

Frequently Asked Questions

Find Quick Answers

What is PASI score and what does it measure?

PASI (Psoriasis Area Severity Index) is a clinical tool used to measure the severity and extent of psoriasis. It evaluates four body regions for both the percentage of affected area and the severity of three key symptoms: redness, thickness, and scaling.

What is the range of PASI scores?

PASI scores range from 0 to 72, with higher scores indicating more severe psoriasis. Scores below 10 indicate mild psoriasis, 10-20 indicate moderate psoriasis, and scores above 20 indicate severe psoriasis.

How accurate is this PASI calculator?

This calculator uses the standard PASI formula validated in clinical practice. It provides the same calculations used by dermatologists worldwide for assessing psoriasis severity in clinical trials and patient monitoring.

Do I need to be a medical professional to use this tool?

While this tool is designed for healthcare professionals, patients can also use it to better understand their psoriasis severity. However, any medical decisions should be made in consultation with a qualified dermatologist.

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