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Medical calculators

117 clinical calculators and scales across 14 specialties — from cardiology to psychiatry.

Custom calculator within the app lets you use all calculators together in one workspace.

Multi-calculator → Enter patient data once to run two calculators at the same time. In the workspace, you can run three; after the first payment, ten.

Cardiology 24

Dutch Lipid Clinic NetworkDiagnosis of familial hypercholesterolaemia using the DLCN score H2FPEFProbability of heart failure with preserved ejection fraction Lp(a) — interpretationClinical interpretation of lipoprotein(a) levels, EAS thresholds SCORE2 + CKDReclassification of cardiovascular risk in kidney disease CHA₂DS₂-VAScStroke risk in atrial fibrillation HAS-BLEDBleeding risk during anticoagulation HEART ScoreAssessment of chest pain in the emergency department GRACE ACSPrognosis in acute coronary syndrome TIMI UA/NSTEMIRisk in unstable angina and NSTEMI TIMI STEMI30-day mortality in STEMI ASCVD 201310-year cardiovascular risk (ACC/AHA) PREVENT 202310-year ASCVD risk (AHA 2023) Framingham10-year coronary risk using the Framingham score RCRIPreoperative cardiac risk (Lee Index) MAPMean arterial pressure QTcQT interval correction (Bazett, Fridericia, Framingham) LDL (Friedewald)LDL cholesterol calculation using the Friedewald formula NYHAFunctional class of heart failure Duke IEDuke criteria for infective endocarditis SCORE210-year risk of fatal and non-fatal cardiovascular events (ESC) CapriniVTE risk in surgical patients PaduaVTE risk in hospitalised medical patients Wells PEClinical probability of pulmonary embolism Wells DVTClinical probability of deep vein thrombosis

Pulmonology 6

Borg scale (dyspnoea)Severity of exertional dyspnoea/fatigue, 0–10 PERCPulmonary embolism rule-out criteria GenevaRevised Geneva score (pulmonary embolism) CURB-65Severity of community-acquired pneumonia PSI/PORTPneumonia severity index ARISCATPreoperative pulmonary risk

ICU 11

Morse Fall ScalePatient fall risk NEWS 2National Early Warning Score APACHE IISeverity of illness in the ICU SOFAAssessment of organ dysfunction in sepsis qSOFARapid assessment of sepsis SIRSSystemic inflammatory response criteria Acid–base statusAcid–base status interpreter MMEMorphine milligram equivalent RASSRichmond Agitation–Sedation Scale Tidal volumeTidal volume calculation for lung-protective ventilation (ARDS) SAPS IISimplified ICU severity score

Neurology 11

Oswestry Disability Index (ODI)Disability due to back pain Roland–Morris (RMDQ)Back pain disability questionnaire VAS / NRS (pain)Pain intensity — visual analogue / numerical rating scale NIHSSNIH Stroke Scale GCSGlasgow Coma Scale ABCD²Stroke risk after TIA Hunt & HessSeverity of subarachnoid haemorrhage mRSModified Rankin Scale ASPECTSCT assessment of ischaemia in the MCA territory DRAGONPrediction of thrombolysis outcomes in stroke ICH ScorePrognosis in intracerebral haemorrhage

Nephrology 10

IPSSInternational Prostate Symptom Score Cockcroft-GaultCreatinine clearance CKD-EPI 2021Estimated GFR (without race adjustment) MDRDEstimated GFR using the MDRD formula FENaFractional excretion of sodium OsmolarityCalculated and measured osmolarity Free water deficitDeficit calculation in hypernatraemia Na⁺ correctionSodium correction in hyperglycaemia Anion gapAnion gap + Δ/Δ analysis AG / AlbuminAlbumin correction of the anion gap

Gastroenterology 8

Wexner scoreSeverity of anal incontinence (Cleveland), 0–20 Child-PughSeverity of liver cirrhosis MELD-NaPrognosis in cirrhosis / transplant priority FIB-4Liver fibrosis index R-FactorType of liver injury (hepatocellular vs cholestatic) Glasgow-BlatchfordNeed for intervention in gastrointestinal bleeding RockallPrognosis in upper gastrointestinal bleeding RansonPrediction of acute pancreatitis severity

Endocrinology 5

BMI / BSABody mass index and body surface area Ideal body weight (Devine)Ideal body weight using the Devine formula HOMA-IRInsulin resistance index Ca²⁺ correctionAlbumin correction of calcium Steroid converterEquivalent glucocorticoid doses

Oncology 6

Gleason scoreGleason grading and score in prostate cancer (ISUP) R-IPIPrognosis in DLBCL in the rituximab era ECOGPerformance status of a cancer patient KarnofskyKarnofsky Performance Status Scale CalvertCarboplatin dose using the Calvert formula CrCl (oncology)Creatinine clearance for chemotherapy dosing

Haematology 6

Colour indexRed blood cell haemoglobin content, with MCH calculation 4T (HIT)Probability of heparin-induced thrombocytopenia DIC ISTHDiagnosis of disseminated intravascular coagulation (ISTH) HScoreProbability of haemophagocytic syndrome ANCAbsolute neutrophil count Reticulocyte indexReticulocyte index (corrected)

Infections 4

Centor/McIsaacProbability of streptococcal pharyngitis MASCCComplication risk in febrile neutropenia PCPSeverity of Pneumocystis pneumonia PSI (reference)PSI/PORT Score — reference card for the infectious disease context

Paediatrics 9

Silverman scoreSeverity of neonatal respiratory distress, 0–10 Tanner stagesStages of sexual development I–V Downes scoreSeverity of neonatal respiratory failure, 0–10 PECARNNeed for CT in paediatric traumatic brain injury Paediatric GCSPaediatric Glasgow Coma Scale Holliday–SegarCalculation of paediatric maintenance fluid requirements Paediatric BMICDC BMI percentile for children ApgarApgar assessment of the newborn BroselowPaediatric tape — estimated weight based on height

Surgery 7

OHI-S hygiene indexSimplified Oral Hygiene Index (Greene–Vermillion) ISS (injury severity)Injury Severity Score — sum of the squares of the 3 highest AIS scores, 0–75 AlvaradoProbability of appendicitis ParklandFluid therapy for burns Surgical ApgarPrediction of postoperative complications Canadian CT rulesNeed for CT in mild traumatic brain injury Ottawa rulesIndications for X-ray in foot/knee injuries

Obstetrics 4

Pregnancy datingEstimated due date and gestational age BishopCervical readiness for induction of labour GDM riskRisk of gestational diabetes mellitus Pre-eclampsiaAssessment of pre-eclampsia risk

Psychiatry 6

Hamilton HAM-DHamilton Depression Rating Scale, 17 items PHQ-9Depression questionnaire (Patient Health Questionnaire) GAD-7Generalised anxiety disorder questionnaire AUDITTest for alcohol-related disorders CIWA-ArAssessment of alcohol withdrawal syndrome severity MMSE / MoCAScreening for cognitive impairment

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