MedCalcHub
Clinical calculations,made clear.
Evidence-based medical calculators and clinical decision-support tools for healthcare professionals.
- 143 calculatorsFree clinical tools
- 17 clinical areasOrganized by topic
- Evidence-basedReferenced sources
- Decision supportFor healthcare professionals
Popular Clinical Tools
Quick access to commonly used medical calculators.
Body Mass Index (BMI)
Calculates Body Mass Index.
CKD-EPI 2021 eGFR Equation
Estimates glomerular filtration rate (eGFR) using the 2021 CKD-EPI creatinine equation.
CHA₂DS₂-VASc Score
CHA₂DS₂-VASc score for stroke risk stratification in patients with non-valvular atrial fibrillation, guiding anticoagulation decisions (score 0–9).
Glasgow Coma Scale
Glasgow Coma Scale.
National Early Warning Score 2 (NEWS2)
National Early Warning Score 2 (NEWS2).
CURB-65 Score
CURB-65 severity score for community-acquired pneumonia.
HEART Score
HEART score for risk stratification of undifferentiated chest pain in the emergency department, predicting 6-week risk of major adverse cardiac events (MACE).
SOFA Score
Sequential Organ Failure Assessment (SOFA) score quantifying six organ systems (respiratory, coagulation, liver, cardiovascular, neurologic, renal) in critically ill patients.
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Explore by Clinical Area
Find calculators organized by medical topic.
Anthropometry
Body composition, weight, and adiposity measurements used for dosing and nutrition assessment.
Cardiology
Cardiac risk scores, anticoagulation tools, and haemodynamic calculations for heart disease.
Emergency
Rapid scoring and decision rules for trauma, sepsis, chest pain, and acute illness.
Endocrinology
Glucose, insulin resistance, thyroid, and steroid equivalence calculations.
Gastroenterology
Liver severity, fibrosis, and gastrointestinal bleeding scores.
Geriatrics
Comorbidity and functional status measures used in the care of older adults.
Infectious Disease
Pneumonia severity and streptococcal pharyngitis scores that support antibiotic stewardship.
Internal Medicine
Acid-base, fluid and electrolyte, weight, and organ function calculations.
Laboratory
Interpretation tools that turn laboratory values into clinically meaningful estimates.
Mental Health
Depression, anxiety, sleepiness, and sleep apnoea screening questionnaires.
Nephrology
Kidney filtration estimates, dialysis adequacy, tubular tests, and injury staging.
Neurology
Stroke, haemorrhage, TIA, and head injury scoring systems.
Obstetrics & Gynecology
Pregnancy dating, fetal assessment, pre-eclampsia screening, and perinatal mood tools.
Oncology
Performance status and functional capacity grading used across oncology practice.
Pediatrics
Age-specific scoring for newborns, children, and adolescents.
Pulmonology
Oxygenation indices, gas exchange ratios, and composite COPD prognosis tools.
Sleep Medicine
Daytime sleepiness and obstructive sleep apnoea screening instruments.
Explore by Specialty
Find calculators by clinical specialty.
Cardiology
Where cardiologists and anticoagulation clinics apply risk and bleeding scores.
Critical Care
Bedside scoring for organ dysfunction and sepsis across an ICU stay.
Emergency Medicine
Fast decision rules for triage, sepsis, and common emergency presentations.
Endocrinology
How diabetes and thyroid clinics turn laboratory results into dosing decisions.
Gastroenterology
Transplant ranking, fibrosis staging, and bleed triage in hepatology and endoscopy.
General Medicine
Cross-cutting tools used in general practice, ward rounds, and pre-assessment.
Internal Medicine
Everyday ward and clinic calculations for fluids, dosing, and staging.
Nephrology
Filtration, dosing, and dialysis checks that move as kidney function changes.
Neurology
Shared numeric scales for stroke units, haemorrhage grading, and recurrence risk.
Obstetrics
Date-bound antenatal tools repeated through pregnancy for dating and screening.
Pediatrics
Growth- and age-referenced tools used from the delivery suite to paediatric wards.
Pulmonology
Oxygenation and prognosis measures used on the wards and in respiratory clinics.
What you will find in this library
MedCalcHub is a free reference of 143 clinical calculators — risk scores, estimates, staging criteria, and dosing aids — for healthcare professionals, trainees, and students who need a number during a shift. Every calculator page shows the formula behind the result, the inputs it expects, notes on interpreting the output, the sources it draws on, and the mistakes that most often lead clinicians astray. The full alphabetical list covers everything in one place.
The library is organised two ways on purpose. Categories group calculators by what is being calculated — kidney function, cardiac risk, fluid balance — while specialties group the same tools by the clinical area they are used in. When two tools look interchangeable, the comparison view lines up their purpose, inputs, formula, and limitations so the differences become visible before you rely on a result.
Browse by subject
Start from the calculation you want to make. Each category page explains its domain and lists every tool it contains.
Browse by clinical area
Start from the ward, clinic, or setting you work in, and see which decisions each tool is there to support.
Compare before you choose
Put up to three calculators side by side to check what each one asks for and what it can and cannot tell you.
Calculators support clinical judgement; they do not replace it. Outputs depend on the values you enter and on the population a tool was derived in, so results should always be read alongside the patient in front of you. Our About page describes how entries are written, which sources they cite, and how review status is recorded.