Clinical tools

Medical Calculators

Find clinical tools by speciality and subject. Calculation will become available only after formula, clinical and licensing review.

Catalogue in development

Browse core tools being assessed. These entries are not yet usable calculators. Every formula, clinical interpretation and licence requires separate verification and approval before calculation is enabled.

170 tools found

Diagnostic scoreMC-087

2025 ISTH overt DIC score

Support diagnosis/classification of overt disseminated intravascular coagulation

Primary: HematologyIn development
Delirium assessmentMC-078

4AT

Rapidly screen for delirium and cognitive impairment

Primary: GeriatricsIn development
Clinical prediction ruleMC-086

4Ts score

Estimate pretest probability of heparin-induced thrombocytopenia

Primary: HematologyIn development
Clinical prediction ruleMC-100

ABC massive transfusion score

Predict likely need for massive transfusion in trauma

Primary: Transfusion MedicineIn development
Clinical prediction ruleMC-115

ABCD2

Historical short-term stroke-risk score after TIA

Primary: NeurologyIn development
Risk equationMC-014

AHA PREVENT

Estimate 10- and 30-year total CVD, ASCVD and heart-failure risk

Primary: CardiologyIn development
Sleep-study calculationMC-051

AHI / RDI

Calculate respiratory events per hour of sleep/recording

Primary: Respiratory Medicine and Sleep MedicineIn development
Clinical prediction ruleMC-074

AIMS65

Estimate inpatient mortality in upper GI bleeding

Primary: Gastroenterology and HepatologyIn development
Clinical prediction ruleMC-161

Alvarado / AIR score

Risk stratify suspected appendicitis

Primary: SurgeryIn development
Laboratory calculationMC-170

ANC

Calculate absolute neutrophil count

Primary: PathologyIn development
Clinical prediction ruleMC-009

Apfel simplified PONV score

Estimate postoperative nausea/vomiting risk

Primary: AnesthesiologyIn development
Neonatal assessmentMC-126

Apgar score

Standardize newborn condition at defined minutes after birth

Primary: PediatricsIn development
Risk scoreMC-070

APRI

Estimate likelihood of liver fibrosis/cirrhosis

Primary: Gastroenterology and HepatologyIn development
Clinical prediction ruleMC-011

ARISCAT

Estimate postoperative pulmonary-complication risk

Primary: AnesthesiologyIn development
Clinical classificationMC-006

ASA Physical Status

Standardize preoperative physical-status classification

Primary: AnesthesiologyIn development
Disease activity instrumentsMC-153

ASDAS / BASDAI

Assess axial spondyloarthritis disease activity

Primary: RheumatologyIn development
Imaging scoreMC-113

ASPECTS

Standardize early ischemic change in anterior-circulation stroke

Primary: RadiologyIn development
Screening questionnaireMC-119

AUDIT-C / AUDIT

Screen for unhealthy alcohol use

Primary: PsychiatryIn development
Functional scoreMC-081

Barthel Index

Measure independence in basic activities of daily living

Primary: Rehabilitation MedicineIn development
Radiobiologic calculationMC-147

BED / EQD2

Compare radiation fractionation schedules using linear-quadratic model

Primary: Radiology and Radiation OncologyIn development
Performance scoreMC-083

Berg Balance Scale

Assess static and dynamic balance

Primary: Rehabilitation MedicineIn development
Clinical prediction ruleMC-075

BISAP

Estimate mortality risk in acute pancreatitis

Primary: Gastroenterology and HepatologyIn development
Clinical scoreMC-124

Bishop score

Assess cervical favorability before induction

Primary: Obstetrics and GynecologyIn development
Anthropometric calculationMC-056

BMI

Calculate weight-for-height index

Primary: Lifestyle MedicineIn development
Prognostic scoreMC-046

BODE index

Estimate COPD mortality risk using BMI, obstruction, dyspnea and exercise

Primary: Respiratory Medicine and Sleep MedicineIn development
Pressure-injury risk scoreMC-085

Braden Scale

Estimate pressure-injury risk

Primary: GeriatricsIn development
Anthropometric calculationMC-059

BSA (Mosteller)

Calculate body surface area

Primary: OncologyIn development
Clinical prediction scoreMC-065

Burch-Wartofsky Point Scale

Support assessment of possible thyroid storm

Primary: Endocrinology and DiabetologyIn development
Drug-dose formulaMC-094

Calvert carboplatin dose

Calculate carboplatin dose from target AUC and GFR

Primary: OncologyIn development
Clinical prediction ruleMC-158

Caprini VTE score

Stratify perioperative VTE risk

Primary: SurgeryIn development
Disease activity scoreMC-150

CDAI / SDAI

Quantify rheumatoid-arthritis disease activity

Primary: RheumatologyIn development
Clinical prediction ruleMC-102

Centor / McIsaac

Estimate likelihood of group A streptococcal pharyngitis and guide testing

Primary: Infectious Diseases and MicrobiologyIn development
Clinical prediction ruleMC-017

CHA2DS2-VASc / CHA2DS2-VA

Estimate thromboembolic risk in atrial fibrillation

Primary: CardiologyIn development
Clinical classificationMC-068

Child-Pugh

Classify cirrhosis severity

Primary: Gastroenterology and HepatologyIn development
Clinical prediction ruleMC-093

CISNE

Stratify complications in apparently stable febrile neutropenia with solid tumors

Primary: OncologyIn development
Withdrawal severity scoreMC-120

CIWA-Ar

Guide symptom-triggered alcohol-withdrawal treatment in suitable patients

Primary: PsychiatryIn development
Pediatric renal equationMC-107

CKiD U25 eGFR

Estimate GFR in children and young adults with CKD

Primary: PediatricsIn development
Patient-reported questionnaireMC-049

COPD Assessment Test (CAT)

Assess COPD health status

Primary: Respiratory Medicine and Sleep MedicineIn development
Laboratory calculationMC-167

Corrected calcium

Estimate albumin-adjusted total calcium

Primary: PathologyIn development
Transfusion calculationMC-098

Corrected count increment (CCI)

Assess platelet transfusion increment and possible refractoriness

Primary: Transfusion MedicineIn development
Withdrawal severity scoreMC-121

COWS

Assess opioid-withdrawal severity

Primary: PsychiatryIn development
Clinical prediction ruleMC-044

CURB-65 / CRB-65

Estimate mortality risk and support site-of-care decisions in community-acquired pneumonia

Primary: Respiratory Medicine and Sleep MedicineIn development
Clinical prediction ruleMC-023

DAPT score

Estimate benefit/harm of extending dual antiplatelet therapy

Primary: CardiologyIn development
Disease activity modelMC-151

DAS28-ESR / DAS28-CRP

Quantify rheumatoid-arthritis disease activity

Primary: RheumatologyIn development
Clinical prediction ruleMC-047

DECAF

Estimate inpatient mortality during acute COPD exacerbation

Primary: Respiratory Medicine and Sleep MedicineIn development
Laboratory conversionMC-064

eAG from HbA1c

Convert HbA1c to estimated average glucose

Primary: Endocrinology and DiabetologyIn development
Composite severity scoreMC-004

EASI

Quantify extent and severity of atopic dermatitis

Primary: DermatologyIn development
Patient-reported questionnaireMC-136

Epworth Sleepiness Scale

Measure subjective daytime sleepiness

Primary: Respiratory Medicine and Sleep MedicineIn development
Clinical prediction ruleMC-103

FeverPAIN

Estimate streptococcal likelihood and support antibiotic strategy for sore throat

Primary: Family Medicine and Primary CareIn development
Risk scoreMC-069

FIB-4

Risk stratify advanced liver fibrosis

Primary: Gastroenterology and HepatologyIn development
Observational scoreMC-141

FLACC pain scale

Assess pain behaviors in nonverbal children

Primary: PediatricsIn development
Risk modelMC-066

FRAX

Estimate 10-year major osteoporotic and hip-fracture probability

Primary: RheumatologyIn development
Patient-reported questionnaireMC-117

GAD-7

Measure generalized-anxiety symptoms and support screening

Primary: PsychiatryIn development
Replacement calculationMC-099

Ganzoni iron deficit

Estimate total iron deficit

Primary: HematologyIn development
Neurologic scoreMC-033

Glasgow Coma Scale

Standardize level of consciousness

Primary: Emergency MedicineIn development
Clinical prediction ruleMC-073

Glasgow-Blatchford Score

Estimate need for intervention/death in upper GI bleeding before endoscopy

Primary: Gastroenterology and HepatologyIn development
Risk modelMC-022

GRACE 2.0

Estimate death or MI risk after acute coronary syndrome

Primary: CardiologyIn development
Risk modelMC-008

Gupta MICA

Estimate perioperative myocardial infarction or cardiac arrest risk

Primary: AnesthesiologyIn development
Clinical prediction ruleMC-019

HAS-BLED

Estimate bleeding risk in atrial fibrillation

Primary: CardiologyIn development
Clinical prediction ruleMC-020

HEART score / HEART Pathway

Risk stratify undifferentiated chest pain for short-term major cardiac events

Primary: Emergency MedicineIn development
Clinical prediction ruleMC-090

HScore

Estimate probability of reactive hemophagocytic syndrome

Primary: HematologyIn development
Neurologic/imaging classificationsMC-114

Hunt-Hess / WFNS / modified Fisher

Grade clinical and imaging severity of aneurysmal subarachnoid hemorrhage

Primary: NeurologyIn development
Prognostic scoreMC-112

ICH score

Estimate mortality risk after spontaneous intracerebral hemorrhage

Primary: NeurologyIn development
Dose/physiology calculationMC-058

Ideal and adjusted body weight

Support ventilation and selected drug-dose calculations

Primary: Internal MedicineIn development
Structured clinical assessmentMC-155

IOC REDs CAT2

Assess suspected relative energy deficiency in sport and stratify participation risk

Primary: Sports MedicineIn development
Diagnostic stagingMC-037

KDIGO AKI stage

Stage acute kidney injury using creatinine and urine output

Primary: NephrologyIn development
Clinical prediction ruleMC-091

Khorana score

Estimate ambulatory cancer-associated VTE risk before systemic therapy

Primary: OncologyIn development
Diagnostic classificationMC-168

Light's criteria

Classify pleural effusion as exudative or transudative

Primary: PathologyIn development
Dynamic prognostic modelMC-072

Lille model

Assess response after corticosteroid treatment for severe alcohol-associated hepatitis

Primary: Gastroenterology and HepatologyIn development
Structured imaging classificationMC-145

Lung-RADS

Standardize lung-cancer screening CT assessment

Primary: RadiologyIn development
Prognostic calculationMC-071

Maddrey Discriminant Function

Assess severity in alcohol-associated hepatitis

Primary: Gastroenterology and HepatologyIn development
Airway classificationMC-013

Mallampati classification

Describe oropharyngeal view as one component of airway assessment

Primary: AnesthesiologyIn development
Perioperative calculationMC-101

Maximum allowable blood loss

Estimate blood loss to a selected minimum hematocrit/hemoglobin

Primary: Transfusion MedicineIn development
Risk modelMC-067

MELD 3.0

Estimate short-term mortality in advanced liver disease and support allocation contexts

Primary: Gastroenterology and HepatologyIn development
Clinical/imaging scoreMC-149

Mirels score

Estimate impending pathologic fracture risk in long-bone metastases

Primary: Radiology and Radiation OncologyIn development
Patient-reported scaleMC-048

mMRC dyspnea scale

Grade activity-related breathlessness

Primary: Respiratory Medicine and Sleep MedicineIn development
Recovery scoreMC-012

Modified Aldrete Score

Assess readiness for discharge from post-anesthesia care

Primary: AnesthesiologyIn development
Dose-equivalence calculationMC-138

Morphine milligram equivalents (MME)

Convert total opioid regimen to an approximate morphine-equivalent daily dose for risk review

Primary: Palliative Care and Pain MedicineIn development
Early warning scoreMC-029

NEWS2

Detect and escalate acute physiological deterioration

Primary: Critical CareIn development
Neurologic scoreMC-111

NIH Stroke Scale

Quantify neurologic deficit in acute stroke

Primary: NeurologyIn development
Prognostic scoreMC-134

Ocular Trauma Score

Estimate visual prognosis after open-globe injury

Primary: OphthalmologyIn development
Risk modelMC-133

OHTS/EGPS 5-year glaucoma risk

Estimate conversion from ocular hypertension to primary open-angle glaucoma

Primary: OphthalmologyIn development
Clinical prediction ruleMC-018

ORBIT bleeding score

Estimate major bleeding risk in AF on anticoagulation

Primary: CardiologyIn development
Physiologic calculationMC-035

P/F and S/F ratios

Quantify hypoxemia and support ARDS classification

Primary: Critical CareIn development
Functional scoreMC-139

Palliative Performance Scale

Describe functional status and support prognosis/communication

Primary: Palliative Care and Pain MedicineIn development
Prognostic scoreMC-140

Palliative Prognostic Index

Estimate short-term survival in advanced illness

Primary: Palliative Care and Pain MedicineIn development
Resuscitation estimateMC-162

Parkland burn resuscitation

Estimate initial crystalloid requirement after major burns

Primary: SurgeryIn development
Composite severity scoreMC-053

PASI

Quantify psoriasis severity, mainly for trials/systemic therapy monitoring

Primary: DermatologyIn development
Clinical prediction rulesMC-129

PECARN pediatric head trauma rules

Identify children at very low risk of clinically important TBI after minor blunt head trauma

Primary: PediatricsIn development
Clinical prediction ruleMC-001

PEN-FAST

Identify adults with a low-risk penicillin-allergy label who may be considered for delabelling pathways

Primary: Allergy and Clinical ImmunologyIn development
Clinical prediction ruleMC-040

PERC

Avoid testing in very-low-risk patients with suspected PE

Primary: Emergency MedicineIn development
Risk scoreMC-043

PESI / simplified PESI

Estimate short-term mortality risk in confirmed PE

Primary: Respiratory Medicine and Sleep MedicineIn development
Patient-reported questionnaireMC-116

PHQ-9

Measure depressive symptom severity and support screening

Primary: PsychiatryIn development
Clinical prediction ruleMC-089

PLASMIC score

Estimate probability of severe ADAMTS13 deficiency in suspected TTP

Primary: HematologyIn development
Risk modelMC-160

POSSUM / P-POSSUM

Estimate surgical morbidity/mortality

Primary: SurgeryIn development
Risk modelMC-024

PRECISE-DAPT

Estimate bleeding risk during DAPT

Primary: CardiologyIn development
Laboratory/time-series calculationMC-166

PSA density / PSA doubling time

Derive PSA metrics used in prostate evaluation/monitoring

Primary: UrologyIn development
Extent estimateMC-052

Psoriasis BSA

Estimate body surface area affected by psoriasis

Primary: DermatologyIn development
Bedside risk scoreMC-031

qSOFA

Flag higher risk among patients with suspected infection

Primary: Critical CareIn development
Laboratory calculationMC-077

R factor for liver injury

Classify hepatocellular, cholestatic or mixed liver injury pattern

Primary: Gastroenterology and HepatologyIn development
Clinical prediction ruleMC-076

Ranson criteria

Estimate severity in acute pancreatitis

Primary: Gastroenterology and HepatologyIn development
Patient-reported compositeMC-152

RAPID3

Track rheumatoid-arthritis status without formal joint count

Primary: RheumatologyIn development
Structured classificationMC-097

RECIST 1.1 response

Classify solid-tumor imaging response

Primary: RadiologyIn development
Diagnostic classificationMC-055

RegiSCAR DRESS score

Classify likelihood of DRESS

Primary: DermatologyIn development
Laboratory calculationMC-171

Reticulocyte index / RPI

Adjust reticulocyte response for anemia and maturation

Primary: PathologyIn development
Prognostic scoreMC-163

Revised Baux score

Estimate burn mortality risk

Primary: SurgeryIn development
Physiologic indexMC-034

ROX index

Estimate risk of failure during high-flow nasal oxygen

Primary: Critical CareIn development
Laboratory calculationMC-169

SAAG

Classify ascites by portal-hypertension likelihood

Primary: Gastroenterology and HepatologyIn development
Structured concussion assessmentMC-154

SCAT6 / Child SCAT6

Standardize multimodal assessment of suspected sports-related concussion

Primary: Sports MedicineIn development
Composite severity scoreMC-003

SCORAD

Quantify atopic dermatitis severity

Primary: DermatologyIn development
Risk equationMC-016

SCORE2 / SCORE2-OP

Estimate fatal and nonfatal CVD risk in European populations

Primary: CardiologyIn development
Prognostic scoreMC-054

SCORTEN

Estimate mortality in SJS/TEN

Primary: DermatologyIn development
Clinical criteriaMC-032

SIRS criteria

Identify systemic inflammatory response

Primary: Critical CareIn development
Organ dysfunction scoreMC-030

SOFA

Quantify organ dysfunction in critical illness

Primary: Critical CareIn development
Risk modelMC-159

SORT

Estimate 30-day mortality after inpatient surgery

Primary: SurgeryIn development
Clinical prediction ruleMC-165

STONE score

Estimate likelihood of uncomplicated ureteral stone

Primary: UrologyIn development
Screening questionnaireMC-010

STOP-Bang

Screen for obstructive sleep apnea risk

Primary: Respiratory Medicine and Sleep MedicineIn development
Performance testMC-082

Timed Up and Go

Assess functional mobility and fall risk

Primary: Rehabilitation MedicineIn development
Clinical prediction ruleMC-021

TIMI UA/NSTEMI

Estimate ischemic-event risk in UA/NSTEMI

Primary: CardiologyIn development
Patient-reported scoreMC-005

UAS7

Track weekly urticaria activity

Primary: Allergy and Clinical ImmunologyIn development
Imaging calculationMC-144

Volume doubling time

Calculate volumetric growth rate between scans

Primary: RadiologyIn development
Anthropometric calculationMC-057

Waist-to-height ratio

Screen central adiposity risk

Primary: Lifestyle MedicineIn development
Clinical prediction ruleMC-042

Wells DVT

Estimate pretest probability of lower-extremity DVT

Primary: Emergency MedicineIn development
Clinical prediction ruleMC-039

Wells PE

Estimate pretest probability of pulmonary embolism

Primary: Emergency MedicineIn development
Clinical severity scoreMC-131

Westley croup score

Grade croup severity

Primary: PediatricsIn development
Risk chart/modelMC-015

WHO CVD risk

Estimate 10-year cardiovascular risk by WHO region

Primary: Public HealthIn development
Diagnostic algorithmMC-041

YEARS PE algorithm

Guide D-dimer threshold and imaging in suspected PE

Primary: Emergency MedicineIn development