Free Medical Calculators for Clinicians
Bedside clinical decision support — validated algorithms, zero data stored
Featured calculators
14-item fall risk & balance assessment. Gold standard for elderly and neurological patients. Score ≤ 45 = high fall risk. MDC 4–6 points.
Knee Injury & Osteoarthritis Outcome Score — 5 subscales, radar chart, MCID tracking. Validated for knee OA, ACL, TKR and meniscus injuries.
Sequential Organ Failure Assessment — predict ICU mortality across 6 organ systems. Score > 11 associated with > 90% mortality.
Body Mass Index with Ideal Body Weight, Basal Metabolic Rate, and daily caloric needs in one workstation.
GDS-15 — 15-item validated depression screen for adults aged 65+. Score ≥ 5 = positive screen. Required for Medicare Annual Wellness Visits. Public domain.
Rockwood 9-level frailty rating — Very Fit (1) to Terminally Ill (9). Used in ICU, emergency, and surgical pre-assessment. Frailty confirmed at CFS ≥ 5.
Free Medical Calculators for Healthcare Professionals
MedicalCalculatorHub is a free, evidence-based clinical decision support platform built for physicians, nurses, physical therapists, occupational therapists, geriatricians, and critical care specialists. Every calculator is constructed from peer-reviewed, validated scoring algorithms — the same systems taught in residency and used at the bedside in leading hospitals worldwide.
Whether you need a SOFA score for a septic ICU patient, a Berg Balance Scale assessment for fall prevention, a GDS-15 depression screen for an elderly patient, or a BMI and ideal body weight calculation before dosing — every tool loads in under one second with no login required.
All calculations run entirely in your browser. No patient data is transmitted or stored. Safe for clinical use without any institutional configuration required.
Physical therapy & rehabilitation tools
Physical therapists and rehabilitation specialists will find the largest dedicated collection outside of specialist software. The Berg Balance Scale and Timed Up and Go (TUG) test are the two most commonly requested balance assessments in inpatient and outpatient rehab settings. Combined with the Gait Speed Calculator — widely called the "sixth vital sign" — clinicians can complete a full functional mobility screen in minutes. For orthopaedic outcomes, the KOOS Score and LEFS cover knee and lower extremity function across all conditions. Spine outcomes include the Oswestry Disability Index and Neck Disability Index.
ICU & critical care decision support
Intensivists and critical care nurses can access the SOFA score for real-time organ failure tracking, the Glasgow Coma Scale for neurological status, NEWS2 for early deterioration detection, and ventilator parameter calculators — all optimised for bedside tablet or phone use without institutional login. Each ICU tool links to its original validation study.
Geriatric assessment & elderly care tools
Geriatricians, physical therapists, occupational therapists, and primary care clinicians have access to a complete Comprehensive Geriatric Assessment (CGA) toolkit. The GDS-15 provides the validated 15-question depression screen required for Medicare Annual Wellness Visits and SNF MDS 3.0. Functional independence is measured with the Katz ADL Index and Lawton IADL Scale. Frailty is assessed with the Clinical Frailty Scale and Edmonton Frail Scale. Physical performance is quantified with the SPPB, and fear of falling with the FES-I.
Clinical departments & specialties
Evidence-based & expert-reviewed
Every scoring system is sourced from its original validation study. The Berg Balance Scale follows Berg et al. (1992). The SOFA score follows Vincent et al. (1996). The Timed Up and Go follows Podsiadlo & Richardson (1991). The KOOS follows Roos & Lohmander (2003). The GDS-15 follows Sheikh & Yesavage (1986). Results supplement — never replace — comprehensive clinical assessment.