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.
The "6th Vital Sign" — assess functional mobility and predict health outcomes from measured walking speed. Age-stratified norms.
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.
Montreal Cognitive Assessment — 8 domains, education adjustment, domain profile chart. Normal ≥ 26. Sensitivity 90% for MCI.
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 MoCA score for cognitive screening, 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 use in HIPAA-regulated clinical environments without system integration.
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 without paper forms or separate apps. Outcome measures including the Oswestry Disability Index, Neck Disability Index, and SPADI are also available for shoulder, spine, and upper extremity assessments.
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, and ventilator parameter calculators — all optimised for use on a bedside tablet or phone 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 MoCA Score Calculator interprets results from the official MoCA® test form across 8 cognitive domains with education adjustment and domain profile visualisation. The GDS-15 provides the validated 15-question depression screen required for Medicare Annual Wellness Visits and SNF MDS 3.0. ADL function is covered by the Katz ADL Index, Lawton IADL Scale, and Barthel Index. Frailty is assessed with the Clinical Frailty Scale and the 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 MoCA follows Nasreddine et al. (2005). The GDS-15 follows Sheikh & Yesavage (1986). Results supplement — never replace — comprehensive clinical assessment.