DerMate.app
🌐 Free · Evidence-based · Always available
Dermatology Tools for Clinicians
Calculators, severity scales, diagnostic guides and classifications — built for dermatologists worldwide, free for everyone.
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Browse by disease using the A–Z menu on the left (or tap the ☰ button on mobile). Select a disease to see its available tools — calculators, severity scales and clinical guides — each clearly labelled by type.
Available now
Calc
Acne
Isotretinoin Dose Calculator
Plan cumulative dose targets with custom phases and track ongoing treatment progress.
Guide
Acne
PCOS Diagnostic Guide
Interactive diagnostic algorithm for polycystic ovary syndrome with phenotype classification, based on the 2023 guideline.
Scale
Atopic Dermatitis
SCORAD
Severity scoring of atopic dermatitis — extent, intensity and symptoms.
Scale
Atopic Dermatitis
EASI Calculator
Eczema Area and Severity Index — four body regions scored for clinical signs and extent.
Scale
Hidradenitis Suppurativa
IHS4 Calculator
Dynamic hidradenitis suppurativa severity scoring using weighted lesion counts.
Scale
Hidradenitis Suppurativa
Refined Hurley Staging
Interactive 7-stage HS classification guiding medical and surgical treatment decisions.
Scale
Hidradenitis Suppurativa
HiSCR Calculator
Hidradenitis Suppurativa Clinical Response — treatment response criterion used in clinical trials.
Scale
Hidradenitis Suppurativa
Modified Sartorius Score (mSS)
Region-by-region HS severity score — best suited for tracking change over time.