Clinical calculators

124 calculators in current use, each built from its primary publication and listed with its references. Where the field has moved on, the current version is the default and the older one is kept, labelled, for comparison. Pogosh offers a calculator when a case warrants it; nothing is calculated until you press Calculate.

Show superseded versions (25) 124 shown

Acid-base / renal

Anion gap (with albumin correction)Acid-base / renal · based on Emmett M and Narins RG (1977) · 4 inputs Calculated serum osmolalityAcid-base / renal · based on Dorwart WV and Chalmers L (1975) · 5 inputs Creatinine clearance (Cockcroft–Gault)Acid-base / renal · based on Cockcroft DW and Gault MH (1976) · 4 inputs Creatinine clearance from a timed urine collectionAcid-base / renal · based on Cockcroft DW and Gault MH (1976) · 4 inputs eGFR — CKD-EPI 2021 race-free (creatinine; creatinine–cystatin C)Acid-base / renal · based on Inker LA et al. (2021) · 4 inputs Expected serum sodium change from infusate and urine outputAcid-base / renal · based on Adrogué HJ and Madias NE (2000) · 9 inputs Fractional excretion of sodium (FENa)Acid-base / renal · based on Espinel CH (1976) · 4 inputs Free water deficit in hypernatremiaAcid-base / renal · based on Yun G et al. (2023) · 3 inputs Infusate rate for a target sodium change (Adrogué–Madias)Acid-base / renal · based on Adrogué HJ and Madias NE (2000) · 6 inputs Kinetic eGFR (creatinine changing acutely)Acid-base / renal · based on Chen S (2013) · 6 inputs Osmolal gapAcid-base / renal · based on Purssell RA et al. (2001) · 6 inputs Residual renal urea clearance (Kru) in hemodialysisAcid-base / renal · based on National Kidney Foundation (2015) · 5 inputs Sodium corrected for hyperglycemiaAcid-base / renal · based on Katz MA (1973) · 2 inputs Sodium deficit (hyponatremia)Acid-base / renal · based on Adrogué HJ and Madias NE (2000) · 4 inputs

Body measurements

Body mass index (BMI)Body measurements · published 2000 · 2 inputs Body surface areaBody measurements · based on Mosteller RD (1987) · 2 inputs Ideal, lean and adjusted body weightBody measurements · based on Janmahasatian S et al. (2005) · 3 inputs Lean body mass from urinary creatinine excretionBody measurements · based on Forbes GB and Bruining GJ (1976) · 1 input

Cardiac

AHA PREVENT equations — 10- and 30-year risk of total CVD, ASCVD and heart failure (2023)Cardiac · based on Khan SS et al. (2024) · 14 inputs Aortic Dissection Detection Risk Score (ADD-RS) with D-dimer (ADvISED)Cardiac · based on Isselbacher EM et al. (2022) · 13 inputs Cardiac output by the Fick principleCardiac · based on Nunn JF (1993) · 7 inputs CHA2DS2-VASc (atrial fibrillation stroke risk)Cardiac · based on Lip GY et al. (2010) · 7 inputs Corrected QT interval (QTc)Cardiac · based on Bazett HC (1920) · 2 inputs HAS-BLED (bleeding risk on anticoagulation in AF)Cardiac · based on Pisters R et al. (2010) · 9 inputs HEART score for chest pain in the emergency departmentCardiac · based on Six AJ et al. (2008) · 5 inputs Intracranial hemorrhage risk with thrombolysis for MI in older adults (Brass)Cardiac · based on Brass LM et al. (2000) · 8 inputs Pooled Cohort Equations — 10-year ASCVD risk (ACC/AHA 2013)Cardiac · based on Goff DC Jr et al. (2013) · 9 inputs Pulmonary vascular resistanceCardiac · based on Humbert M et al. (2022) · 3 inputs Revised Jones criteria for acute rheumatic fever (AHA 2015)Cardiac · based on Gewitz MH et al. (2015) · 11 inputs San Francisco Syncope RuleCardiac · based on Quinn JV et al. (2004) · 5 inputs TIMI risk score — STEMICardiac · based on Morrow DA et al. (2000) · 8 inputs TIMI risk score — UA / NSTEMICardiac · based on Antman EM et al. (2000) · 7 inputs

Cardiovascular

Mean arterial pressure (MAP)Estimates mean arterial pressure from a cuff reading as (SBP + 2 × DBP) / 3, with an optional heart-rate-corrected estimate because the standard formula underestimates MAP at faster heart rates.

Critical care

ABC score (Assessment of Blood Consumption) for massive transfusion in traumaCritical care · based on Nunez TC et al. (2009) · 4 inputs APACHE II severity scoreCritical care · based on Knaus WA et al. (1985) · 17 inputs Multiple Organ Dysfunction Score (MODS, Marshall)Critical care · based on Marshall JC et al. (1995) · 8 inputs qSOFA (quick SOFA) — Sepsis-3 bedside promptCritical care · based on Singer M et al. (2016) · 3 inputs Shock index (heart rate ÷ systolic blood pressure)Critical care · based on Rossaint R et al. (2023) · 2 inputs SIRS criteria (systemic inflammatory response syndrome)Counts the four 1992 ACCP/SCCM SIRS criteria (temperature, heart rate, respiratory rate or PaCO2, white cell count or bands); 2 or more meets SIRS. Sepsis-3 now defines sepsis by organ dysfunction instead.SOFA score (Sequential [Sepsis-related] Organ Failure Assessment)Critical care · based on Vincent JL et al. (1996) · 9 inputs

Critical care / anesthesia

Arterial oxygen content (CaO2)Critical care / anesthesia · based on Nunn JF (1993) · 3 inputs Estimated blood volume and allowable blood lossCritical care / anesthesia · based on Gross JB (1983) · 4 inputs Oxygen consumption (VO2) from expired gasCritical care / anesthesia · based on Nunn JF (1993) · 3 inputs Venous oxygen content (CvO2)Critical care / anesthesia · based on Nunn JF (1993) · 3 inputs

Electrolytes

Corrected calcium for albumin (Payne)Albumin-adjusted total calcium: the common form adds 0.8 mg/dL per 1 g/dL that albumin is below 4.0 (0.02 mmol/L per g/L below 40), with the original 1973 Payne formula alongside. Ionized calcium is preferred.

Endocrine

A1c ↔ estimated average glucose (ADAG)Endocrine · based on Nathan DM et al. (2008) · 2 inputs Cambridge diabetes risk score — probability of undiagnosed type 2 diabetes (Griffin)Endocrine · based on Griffin SJ et al. (2000) · 7 inputs Metabolic syndrome (harmonized 2009; AHA/NHLBI 2005 cut-offs)Endocrine · based on Alberti KG et al. (2009) · 5 inputs

Gastroenterology

Ranson criteria — gallstone pancreatitisGastroenterology · based on Ranson JH (1982) · 10 inputs Ranson criteria — non-gallstone pancreatitisGastroenterology · based on Ranson JH et al. (1974) · 11 inputs Serum–ascites albumin gradient (SAAG)Gastroenterology · published 1992 · 2 inputs

Gastrointestinal

Irritable bowel syndrome — Rome IV criteria and subtypeGastrointestinal · based on Mearin F et al. (2016) · 7 inputs Oakland score — safe discharge after lower GI bleedingGastrointestinal · based on Oakland K et al. (2017) · 7 inputs Strate rule — severe acute lower intestinal bleedingGastrointestinal · based on Strate LL et al. (2003) · 7 inputs

Geriatrics

STRATIFY fall-risk score for older inpatientsGeriatrics · based on Oliver D et al. (1997) · 5 inputs

Hematology

Absolute neutrophil count (ANC)Hematology · based on Freifeld AG et al. (2010) · 3 inputs ISTH overt DIC scoreHematology · based on Taylor FB Jr et al. (2001) · 4 inputs

Hematology / VTE

Caprini VTE risk score (surgical patients)Adds Caprini risk-factor points for venous thromboembolism in surgical patients and gives the ACCP 2012 risk category (very low, low, moderate, high) with the estimated baseline VTE risk without prophylaxis.Padua Prediction Score (VTE risk in hospitalized medical patients)Adds 11 weighted risk factors to identify hospitalized medical patients at high risk of venous thromboembolism (4 or more points) who may benefit from thromboprophylaxis.

Hematology/Oncology

MDS Revised International Prognostic Scoring System (IPSS-R)Hematology/Oncology · based on Greenberg PL et al. (2012) · 5 inputs Multiple myeloma, smoldering myeloma and MGUS (IMWG 2014)Hematology/Oncology · based on Rajkumar SV et al. (2014) · 11 inputs

Hepatology

MELD 3.0Hepatology · based on Kim WR et al. (2021) · 7 inputs PELD-Cr score (OPTN 2023 pediatric end-stage liver disease, with creatinine)Hepatology · published 2025 · 7 inputs

Infectious disease

2023 Duke-ISCVID criteria for infective endocarditisInfectious disease · based on Fowler VG et al. (2023) · 12 inputs McIsaac (modified Centor) score for streptococcal pharyngitisInfectious disease · based on McIsaac WJ et al. (1998) · 5 inputs

Laboratory

Phenytoin level corrected for albumin (Sheiner–Tozer)Laboratory · based on Kiang TK and Ensom MH (2016) · 3 inputs

Musculoskeletal

FRACTURE Index with BMD (Black) — 5-year fracture riskMusculoskeletal · based on Black DM et al. (2001) · 7 inputs Osteoporosis risk SCORE (Lydick) — who needs bone densitometryMusculoskeletal · based on Lydick E et al. (1998) · 6 inputs Osteoporosis Self-assessment Tool (OST)Musculoskeletal · based on Koh LK et al. (2001) · 3 inputs

Neonatology

Newborn hyperbilirubinemia — AAP 2022 phototherapy, escalation-of-care and exchange thresholds (≥ 35 weeks)Neonatology · based on Kemper AR et al. (2022) · 4 inputs

Neurology

Three-item scale for early prediction of stroke recovery (Baird)Neurology · based on Baird AE et al. (2001) · 3 inputs

Neurology / infectious

CSF protein correction for a traumatic tapNeurology / infectious · based on Nigrovic LE et al. (2011) · 5 inputs CSF white cell correction for a traumatic tapNeurology / infectious · based on Mayefsky JH and Roghmann KJ (1987) · 4 inputs

Neurology / trauma

ABCD² score (stroke risk after TIA)Neurology / trauma · based on Johnston SC et al. (2007) · 5 inputs Canadian CT Head Rule (minor head injury, adults)Neurology / trauma · based on Stiell IG et al. (2001) · 7 inputs Glasgow Coma ScaleNeurology / trauma · based on Teasdale G and Jennett B (1974) · 3 inputs NIH Stroke Scale (NIHSS)Neurology / trauma · based on Brott T et al. (1989) · 15 inputs

Obstetrics

Bishop score (cervical favourability for induction of labour)Scores dilation, effacement or cervical length, station, consistency and position (0–13) to judge whether the cervix is favourable before induction of labour; NICE uses 6 or less vs more than 6 to choose the method.Due date and gestational age (from LMP or EDD)Obstetrics · published 2017 · 3 inputs Gestational age from crown–rump length (Robinson)Obstetrics · based on Robinson HP and Fleming JE (1975) · 1 input Should the due date be changed? (LMP vs ultrasound, ACOG)Obstetrics · published 2017 · 2 inputs

Pediatrics

Apgar scorePediatrics · based on Apgar V (1953) · 5 inputs Bacterial Meningitis Score (children)Pediatrics · based on Nigrovic LE et al. (2002) · 5 inputs CDC growth percentiles, 2–20 years (BMI, stature, weight for age)Pediatrics · based on Kuczmarski RJ et al. (2000) · 5 inputs CDC weight-for-stature percentile (77–121 cm)Pediatrics · based on Kuczmarski RJ et al. (2000) · 3 inputs Kawasaki disease — complete and incomplete criteria (AHA 2017)Pediatrics · based on McCrindle BW et al. (2017) · 15 inputs Maintenance fluid rate (Holliday–Segar, 4-2-1)Pediatrics · based on Holliday MA and Segar WE (1957) · 1 input PECARN head injury rule — children aged 2 years and olderPediatrics · based on Kuppermann N et al. (2009) · 6 inputs PECARN head injury rule — children younger than 2 yearsPediatrics · based on Kuppermann N et al. (2009) · 6 inputs Pediatric Appendicitis Score (Samuel)Pediatrics · based on Samuel M (2002) · 8 inputs WHO growth standards, birth to 24 months (weight, length, head circumference, weight-for-length)Pediatrics · published 2006 · 6 inputs

Perioperative

Postoperative pneumonia risk index (Arozullah)Perioperative · published 2001 · 14 inputs Revised Cardiac Risk Index (Lee)Perioperative · based on Lee TH et al. (1999) · 6 inputs

Prognosis

1-year mortality after hospitalization, age ≥ 70 (Walter index)Prognosis · based on Walter LC et al. (2001) · 6 inputs

Psychiatry

PHQ-2 depression screenPsychiatry · based on Kroenke K et al. (2003) · 2 inputs

Pulmonary

Alveolar–arterial (A–a) oxygen gradientPulmonary · based on Mellemgaard K (1966) · 7 inputs BODE index for COPDPulmonary · based on Celli BR et al. (2004) · 4 inputs Brock University (PanCan) model — probability that a screen-detected lung nodule is cancerPulmonary · based on McWilliams A et al. (2013) · 10 inputs CURB-65 pneumonia severityPulmonary · based on Lim WS et al. (2003) · 5 inputs Peak expiratory flow variabilityPulmonary · based on Global Initiative for Asthma (2024) · 2 inputs Pneumonia Severity Index (PSI / PORT)Pulmonary · based on Fine MJ et al. (1997) · 20 inputs Predicted peak expiratory flow (adults)Pulmonary · based on Nunn AJ and Gregg I (1989) · 4 inputs Solitary pulmonary nodule malignancy probability (Mayo Clinic model)Pulmonary · based on Swensen SJ et al. (1997) · 6 inputs

Rheumatology

Behçet disease — International Criteria (ICBD 2014)Rheumatology · published 2014 · 7 inputs

Statistics

Diagnostic test performance (PPV, NPV, likelihood ratios, post-test probability)Statistics · based on Grimes DA and Schulz KF (2005) · 3 inputs

Toxicology

Acetaminophen level vs Rumack–Matthew treatment lineToxicology · based on Rumack BH and Matthew H (1975) · 2 inputs

Trauma / burns

Burn resuscitation fluid estimate (Parkland / ABA)Trauma / burns · based on Baxter CR and Shires T (1968) · 3 inputs

Trauma / orthopedics

Canadian C-Spine Rule (alert, stable adult trauma)Trauma / orthopedics · based on Stiell IG et al. (2001) · 9 inputs NEXUS low-risk criteria for cervical-spine imagingTrauma / orthopedics · based on Hoffman JR et al. (2000) · 5 inputs Ottawa ankle ruleTrauma / orthopedics · based on Stiell IG et al. (1993) · 4 inputs Ottawa foot ruleTrauma / orthopedics · based on Stiell IG et al. (1993) · 4 inputs Ottawa knee ruleTrauma / orthopedics · based on Stiell IG et al. (1996) · 5 inputs

Venous thromboembolism

Age-adjusted D-dimer cut-off for suspected PEVenous thromboembolism · based on Righini M et al. (2014) · 2 inputs Pulmonary embolism rule-out criteria (PERC)Venous thromboembolism · based on Kline JA et al. (2004) · 9 inputs Simplified Pulmonary Embolism Severity Index (sPESI)Venous thromboembolism · based on Jiménez D et al. (2010) · 6 inputs Wells score for DVT (2003 modified)Venous thromboembolism · based on Wells PS et al. (2003) · 10 inputs Wells score for pulmonary embolismVenous thromboembolism · based on Wells PS et al. (2000) · 7 inputs

Dosing utilities

Adult dose scaled to body surface areaDosing utilities · based on Du Bois D and Du Bois EF (1916) · 3 inputs BSA-based doseDosing utilities · based on Mosteller RD (1987) · 4 inputs Carboplatin dose (Calvert formula)Dosing utilities · based on Calvert AH et al. (1989) · 6 inputs Corticosteroid dose equivalence (glucocorticoid effect)Dosing utilities · based on Liu D et al. (2013) · 3 inputs IV infusion rate from a weight-based doseDosing utilities · 4 inputs Total iron deficit (Ganzoni)Dosing utilities · based on Ganzoni AM (1970) · 3 inputs Weight-based dose and liquid volumeDosing utilities · 4 inputs

Decision support for clinicians — review before acting. These calculators do not diagnose or decide. They are offered, never run automatically, and the treating clinician decides what a score means for the patient in front of them. Partners can call the same calculators through the Pogosh CDS API.