Health & Clinical Calculators

Clinical health calculators cover the standard risk-scoring, drug-dosing, and physiological reference calculations used in medical practice, cited to their original journal publications. These are educational reference tools, not clinical decision-support software — use in patient care requires clinical judgment and validated software cleared for that purpose by relevant regulators (FDA in the US).

Risk score calculators include Framingham (cardiovascular risk from Kannel et al. 1976 with subsequent updates), ASCVD 10-year risk (ACC/AHA 2013 pooled cohort equations), CHA₂DS₂-VASc (atrial fibrillation stroke risk, Lip et al. 2010), HAS-BLED (bleeding risk on anticoagulation, Pisters et al. 2010), MELD and MELD-Na (liver disease severity, Kamath et al. 2001), qSOFA (sepsis screening, Sepsis-3 criteria 2016), Wells score (DVT and PE), Alvarado (appendicitis), CURB-65 (pneumonia severity), and many others. Each cites its original publication and specifies the population it was validated in.

Drug dosing calculators use body surface area (Du Bois-Du Bois 1916 and Mosteller 1987), lean body mass (Boer 1984, Hume 1966, James 1976), creatinine clearance (Cockcroft-Gault 1976 and Salazar-Corcoran for obese patients), and glomerular filtration rate (MDRD, CKD-EPI 2009 and 2021 versions). These are the same calculations underlying pharmacy dispensing systems and clinical decision support in electronic health records.

Physiological calculators include ideal body weight (Devine, Robinson, Miller, Hamwi — all four formulas since each has clinical applications), basal metabolic rate (Mifflin-St Jeor 1990, Harris-Benedict Roza-Shizgal 1984, Katch-McArdle from lean body mass), predicted peak expiratory flow (from ATS/ERS standards), and pediatric growth reference (CDC 2000 charts, WHO growth standards for under-5).

These calculators are intended for healthcare professionals, medical students, and researchers as reference and education tools. Patients using these calculators should not make treatment decisions based on outputs — clinical judgment integrating individual medical history, physical examination, laboratory findings, and specialist expertise is required. Every calculator page states which population the score was validated in and what its predictive value is.

Reviewed by the ScoutMyTool editorial team. Formulas verified against primary authoritative sources.