Clinical Calculators calculators
Validated medical scores and formulas: CHA2DS2-VASc, GCS, MELD, Wells, ABG, sodium correction and screening questionnaires.
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Centor Score CalculatorEstimate the chance a sore throat is strep with the Centor and McIsaac criteriaCHA2DS2-VASc Score CalculatorScore stroke risk in atrial fibrillation with CHA2DS2-VASc and CHA2DS2-VACURB-65 CalculatorScore community-acquired pneumonia severity with CURB-65 or CRB-65Edinburgh Postnatal Depression ScaleScore the 10-question EPDS for postnatal and antenatal depressionEpworth Sleepiness ScaleRate your chance of dozing in eight situations to measure daytime sleepinessFramingham Risk Score CalculatorEstimate 10-year cardiovascular disease risk and heart ageGAD-7 Anxiety TestScore the seven-question GAD-7 and see your anxiety severity bandGlasgow Coma Scale CalculatorScore eye, verbal and motor responses for a GCS total and GCS-PHEART Score CalculatorRisk-stratify chest pain for major adverse cardiac events in six weeksLab Unit Converter (mg/dL to mmol/L)Convert cholesterol, glucose, creatinine and more between US and SI unitsMELD Score CalculatorCalculate MELD 3.0, MELD-Na and original MELD liver disease scoresPHQ-9 Depression TestScore the nine-question PHQ-9 and see the depression severity bandSTOP-BANG Sleep Apnea ScoreScreen for obstructive sleep apnea risk with eight yes/no questions
More clinical calculators tools
A-a Gradient CalculatorAlveolar–arterial oxygen gradient with the expected value for ageABCD2 Score CalculatorTwo-day stroke risk after a transient ischaemic attack (TIA)ABG InterpreterStep-by-step blood gas analysis: primary disorder, compensation, anion gapAbsolute Neutrophil Count CalculatorANC from white count and differential, with neutropenia severity and gradeAdjusted Body Weight CalculatorAdjusted body weight from actual and ideal (Devine) body weightAlvarado Score CalculatorMANTRELS score (0–10) for the likelihood of acute appendicitisAnkle-Brachial Index CalculatorABI for each leg from Doppler pressures, using 2024 ACC/AHA categoriesASRS Adult ADHD Self-ReportScore the six-question WHO adult ADHD screener (ASRS v1.1 Part A)AUDIT Alcohol Screening TestScore the WHO 10-question AUDIT or the 3-question AUDIT-CBishop Score CalculatorScore cervical favourability (0–13) before induction of labourBraden Scale CalculatorPressure injury (bedsore) risk from six nursing subscales, 6–23BUN to Creatinine Ratio CalculatorWork out the BUN/creatinine ratio in US or SI units and see what it suggestsBurn Surface Area CalculatorEstimate % total body surface area burned by rule of nines or Lund–BrowderCanadian CT Head RuleApply the Canadian CT Head Rule to adults with minor head injuryCaprini VTE Risk ScoreScore venous thromboembolism risk in surgical patients with the Caprini modelChild-Pugh Score CalculatorGrade cirrhosis severity as Child-Pugh class A, B or C from five findingsCorrected Sodium CalculatorCorrect serum sodium for high glucose with the Katz and Hillier factorsDiabetes Risk Calculator (FINDRISC)Estimate your 10-year type 2 diabetes risk with the 8-question FINDRISCECG Heart Rate CalculatorRead heart rate off an ECG strip with the 300, 1500 or 6-second methodFENa CalculatorFractional excretion of sodium and urea to separate prerenal from renal AKIFIB-4 CalculatorEstimate advanced liver fibrosis risk from age, AST, ALT and plateletsFree Water Deficit CalculatorEstimate the free water deficit in hypernatremia from sodium and weightHAS-BLED Score CalculatorEstimate 1-year major bleeding risk in atrial fibrillation on anticoagulationHOMA-IR CalculatorInsulin resistance (HOMA-IR) and beta-cell function (HOMA-B) from fasting labsMedication Half-Life CalculatorSee how much of a drug remains over time and when steady state is reachedMorse Fall ScaleScore inpatient fall risk with the six-item Morse Fall Scale (0–125)NEWS2 Score CalculatorCalculate the National Early Warning Score 2 from six vital signsNIH Stroke Scale CalculatorScore all 15 NIHSS items and get the total stroke severity (0–42)Number Needed to Treat CalculatorTurn trial event rates into NNT, NNH, absolute and relative risk reductionOttawa Ankle RulesCheck whether the Ottawa rules call for an ankle or foot X-ray seriesOxygen Tank Duration CalculatorFind how long an oxygen cylinder will last at a given flow ratePERC Rule CalculatorApply the 8 pulmonary embolism rule-out criteria in low-risk patientsPerceived Stress ScaleScore the 10-item Perceived Stress Scale (PSS-10) with correct reverse scoringPulse Pressure CalculatorFind pulse pressure from a BP reading and see if it is wide or narrowQRISK3 CalculatorEstimate 10-year risk of heart attack or stroke with the UK QRISK3 algorithmqSOFA Score CalculatorQuick bedside sepsis screen: respiratory rate, mentation and systolic BPRevised Cardiac Risk Index CalculatorEstimate the risk of major cardiac complications after noncardiac surgerySCORE2 Cardiovascular Risk CalculatorEuropean 10-year risk of heart attack and stroke by risk regionSensitivity and Specificity CalculatorGet sensitivity, specificity, PPV, NPV and likelihood ratios from a 2×2 tableSerum Osmolality CalculatorCalculate serum osmolality and the osmolal gap from routine labsSIRS Criteria CalculatorCheck the four SIRS criteria from vital signs and white cell countSOFA Score CalculatorScore organ dysfunction across six systems, from 0 to 24Tidal Volume CalculatorLung-protective tidal volumes from predicted body weight (4–8 mL/kg)TIMI Risk Score CalculatorScore 14-day risk of death or ischaemic events in UA/NSTEMIWells Score for DVTEstimate the pretest probability of deep vein thrombosisWells Score for PEEstimate the pretest probability of pulmonary embolismWinter's Formula CalculatorExpected PaCO₂ in metabolic acidosis and whether compensation is adequateAPACHE II Score CalculatorICU severity of illness score from the worst values in the first 24 hoursAPRI Score CalculatorAST to Platelet Ratio Index for liver fibrosis and cirrhosisCardiac Output CalculatorCardiac output, cardiac index and stroke volume by HR × SV or the Fick methodDelta Gap CalculatorDelta gap and delta ratio to uncover mixed acid–base disordersLight's Criteria CalculatorClassify a pleural effusion as exudate or transudate from protein and LDHMaximum Allowable Blood Loss CalculatorEstimate blood volume and how much loss brings Hct to a chosen floorP/F Ratio CalculatorPaO₂/FiO₂ ratio with Berlin ARDS severity and altitude correctionPediatric eGFR (Schwartz) CalculatorEstimate a child’s GFR from height and serum creatininePediatric ETT Size CalculatorAge-based endotracheal tube size and insertion depth for children 1–10Ranson Criteria CalculatorScore acute pancreatitis severity at admission and at 48 hoursReticulocyte Production Index CalculatorCorrect the reticulocyte count for anemia and get the production indexRSBI CalculatorRapid shallow breathing index (f/VT) for ventilator weaning trialsShock Index CalculatorHeart rate ÷ systolic pressure, plus the modified shock indexUrine Output CalculatorConvert collected urine into mL/kg/hr and check KDIGO oliguria criteria