Dermatology Severity & Skin Lesions
Every dermatology severity & skin lesions calculator on CalcEngines — unit converters, derived indices and interpretive tools, each with its formula, a worked example and the reference intervals it is judged against.
8 calculators in this section
- Breslow Thickness T Category Interpreter (AJCC 8th)The AJCC eighth edition moved the T1a/T1b boundary to 0.8 mm and records thickness to one decimal place — so a melanoma measured at 0.75 mm is recorded as 0.8 mm and changes category. Ulceration is part of the answer, not an afterthought.
- EASI Calculator (Eczema Area and Severity Index)Four regions, four signs each, and region multipliers that DEPEND ON AGE: head and neck 0.1 at eight and over but 0.2 under eight, lower limbs 0.4 and 0.3. The same findings give different totals.
- PASI 75 and PASI 90 Response CalculatorRelative improvement from baseline: (baseline − current) / baseline × 100. An absolute PASI and a PASI response answer different questions, and treat-to-target guidance now names both.
- PASI Calculator (Psoriasis Area and Severity Index)Four body regions weighted 0.1, 0.2, 0.3 and 0.4, each scored for erythema, induration and desquamation and for the area involved. The index runs 0 to 72 — and it is blind to site, symptoms and small areas of devastating disease.
- SCORAD Calculator for Atopic DermatitisSCORAD = A/5 + 7B/2 + C, running 0 to 103. Objective SCORAD drops C — the two patient-reported items — and runs 0 to 83. They are not interchangeable, and the 7B/2 coefficient is the one to check.
- SINBAD Score for Diabetic Foot UlcersSix binary observations — Site, Ischaemia, Neuropathy, Bacterial infection, Area, Depth — each worth one point, total 0 to 6. The system the IWGDF recommends for communication between professionals and for audit.
- Topical Dosing Calculator: Fingertip Units to GramsOne fingertip unit is about 0.5 g of ointment from a 5 mm nozzle and covers roughly two adult handprints. This turns the published FTU count for a body region into grams per week, so a reader can see whether a quantity matches a treatment plan.
- Weighted 7-Point Checklist for Pigmented LesionsThree major features at 2 points, four minor at 1 point. NICE names a score of 3 or more in its skin cancer recommendations — and in the validation cohort the specificity at that cut-off was 35 per cent and three of 36 melanomas scored below it.