Medical calculators
Clinical scores and formulas — each with its primary source.
273 calculators
Cardiology28
- CHA₂DS₂-VAStroke risk in atrial fibrillation (ESC 2024, sex removed)
- HAS-BLEDMajor bleeding risk on anticoagulation
- HEART Score6-week MACE risk in chest pain
- Shock indexHeart rate ÷ systolic blood pressure — bedside marker of hypovolaemic shock
- ÖGARI pre-operative cardiac work-up (Austrian guideline 2026)ECG, echocardiography and cardiac biomarkers before elective non-cardiac surgery by METs, surgical category and symptoms
- SCORE2 (ESC 2021, age 40–69)10-year risk of fatal and non-fatal cardiovascular disease in apparently healthy Europeans aged 40–69
- SCORE2-OP (ESC 2021, age ≥ 70)10-year risk of fatal and non-fatal cardiovascular disease in apparently healthy Europeans aged 70 and over
- CHA₂DS₂-VAScStroke risk in atrial fibrillation (classic score incl. female sex)
- Marburg Heart Score (Marburger Herz-Score)Rules out coronary heart disease as the cause of chest pain in primary care
- H₂FPEF scoreLikelihood of heart failure with preserved ejection fraction in unexplained dyspnoea
- TIMI risk score (UA/NSTEMI)14-day risk of death, MI or urgent revascularisation in unstable angina / NSTEMI
- QTc (Bazett / Fridericia)Heart-rate-corrected QT interval with Bazett or Fridericia
- Mean arterial pressure (MAP)Mean arterial pressure from systolic and diastolic blood pressure
- Cholesterol mg/dL → mmol/LConvert cholesterol from mg/dL to mmol/L
- Triglycerides mg/dL → mmol/LConvert triglycerides from mg/dL to mmol/L
- LDL cholesterol mg/dL → mmol/LConvert ldl cholesterol from mg/dL to mmol/L
- LDL cholesterol mmol/L → mg/dLConvert ldl cholesterol from mmol/L to mg/dL
- HDL cholesterol mg/dL → mmol/LConvert hdl cholesterol from mg/dL to mmol/L
- HDL cholesterol mmol/L → mg/dLConvert hdl cholesterol from mmol/L to mg/dL
- Troponin ng/mL → ng/LConvert troponin from ng/mL to ng/L
- Troponin ng/L → ng/mLConvert troponin from ng/L to ng/mL
- Revised Cardiac Risk Index (Lee)Risk of major cardiac complications after elective non-cardiac surgery
- Duke Activity Status Index (DASI)Self-reported functional capacity before surgery, with estimated VO₂peak
- Wells score (deep vein thrombosis)Pre-test probability of leg DVT (two-level: likely / unlikely)
- GRACE score (in-hospital mortality)Risk of in-hospital death in acute coronary syndrome (Granger 2003 nomogram)
- QTc (Framingham / Hodges)Heart-rate-corrected QT with the linear Framingham or Hodges formula
- Canadian Syncope Risk Score (CSRS)30-day risk of serious outcomes after emergency-department assessment of syncope
- San Francisco Syncope RuleIdentifying emergency patients with syncope at risk of short-term serious outcomes (CHESS)
Respiratory / Infection26
- Wells score (pulmonary embolism)Clinical probability for PE
- CURB-65Severity and site of care in community-acquired pneumonia
- qSOFABedside alert for poor outcome in suspected infection
- CRB-65Mortality risk and treatment setting in community-acquired pneumonia — no blood test needed
- Centor scoreProbability of group A streptococcal pharyngitis in adolescents and adults (≥ 15 years)
- McIsaac score (modified Centor)Age-adjusted probability of group A streptococcal pharyngitis from 3 years of age
- FeverPAIN scoreLikelihood of streptococcal (group A/C/G) sore throat in primary care, from 3 years of age
- Pressure (blood gas) mmHg → kPaConvert pressure (blood gas) from mmHg to kPa
- Pressure (blood gas) kPa → mmHgConvert pressure (blood gas) from kPa to mmHg
- BODE index (COPD)Multidimensional mortality risk grading in stable COPD
- GOLD ABE assessment (COPD)Initial COPD group (A, B, E) to guide first pharmacological treatment — GOLD 2023+
- DECAF score (COPD exacerbation)In-hospital mortality risk in patients admitted with an acute exacerbation of COPD
- A–a oxygen gradientAlveolar–arterial O₂ difference from a blood gas, in kPa (mmHg input accepted)
- PaO₂/FiO₂ ratio (ARDS severity, Berlin)Oxygenation index with Berlin ARDS severity grading; PaO₂ in kPa or mmHg
- ROX index (high-flow nasal oxygen)Predicts success or failure of high-flow nasal oxygen in hypoxaemic respiratory failure
- Light's criteria (pleural effusion)Classify a pleural effusion as exudate or transudate
- Murray lung injury scoreSeverity of acute lung injury from chest X-ray, oxygenation, PEEP and compliance
- Predicted body weight & protective tidal volumeTidal volume in mL from predicted body weight (ARDSNet formula) for lung-protective ventilation
- ARISCAT scoreRisk of postoperative pulmonary complications
- Revised Geneva score (simplified)Clinical pre-test probability of pulmonary embolism, one point per item
- YEARS algorithmRule out pulmonary embolism with a D-dimer threshold adapted to three clinical items
- Age-adjusted D-dimer cut-offD-dimer threshold for excluding PE in patients over 50 (age × 10 µg/L)
- PERC rulePulmonary Embolism Rule-out Criteria — skip D-dimer when gestalt probability is already low
- sPESI (simplified Pulmonary Embolism Severity Index)30-day mortality risk in confirmed acute pulmonary embolism
- PESI (Pulmonary Embolism Severity Index)30-day mortality risk class (I–V) in confirmed acute pulmonary embolism
- Hestia criteriaEligibility for outpatient treatment of acute pulmonary embolism
Neurology15
- Glasgow Coma ScaleLevel of consciousness
- 4AT (delirium screen)Rapid delirium and cognitive-impairment screen for adults in acute care
- Canadian CT Head RuleNeed for head CT after minor head injury (GCS 13–15) in adults
- Canadian C-Spine RuleNeed for cervical-spine imaging in alert, stable adults after blunt trauma
- NEXUS criteria (cervical spine)Clinical clearance of the cervical spine without imaging after blunt trauma
- NIH Stroke Scale (NIHSS)Standardised severity of the neurological deficit in acute stroke
- Modified Rankin Scale (mRS)Global disability and dependence after stroke
- ABCD² scoreEarly stroke risk after transient ischaemic attack (TIA)
- ICH score30-day mortality risk in spontaneous intracerebral haemorrhage
- Hunt & Hess scaleClinical grade of aneurysmal subarachnoid haemorrhage
- WFNS grade (subarachnoid haemorrhage)GCS-based clinical grade of subarachnoid haemorrhage
- Modified Fisher scaleCT grade of subarachnoid haemorrhage — risk of symptomatic vasospasm
- RACE scalePrehospital screen for large-vessel occlusion in suspected stroke
- ICH volume (ABC/2)Bedside estimate of intracerebral haemorrhage volume from three CT diameters
- Ottawa subarachnoid haemorrhage ruleRuling out subarachnoid haemorrhage in alert adults with acute non-traumatic headache
Renal22
- eGFR (CKD-EPI 2021)Estimated glomerular filtration rate, race-free equation
- Creatinine clearance (Cockcroft-Gault)The CrCl estimate many product labels refer to for dose adjustment
- Uric acid mg/dL → µmol/LConvert uric acid from mg/dL to µmol/L
- Uric acid µmol/L → mg/dLConvert uric acid from µmol/L to mg/dL
- Phosphate (as phosphorus) mg/dL → mmol/LConvert phosphate (as phosphorus) from mg/dL to mmol/L
- Phosphate (as phosphorus) mmol/L → mg/dLConvert phosphate (as phosphorus) from mmol/L to mg/dL
- Urine albumin-to-creatinine ratio (ACR) mg/g → mg/mmolConvert urine albumin-to-creatinine ratio (acr) from mg/g to mg/mmol
- Urine albumin-to-creatinine ratio (ACR) mg/mmol → mg/gConvert urine albumin-to-creatinine ratio (acr) from mg/mmol to mg/g
- Urine protein-to-creatinine ratio (PCR) mg/g → mg/mmolConvert urine protein-to-creatinine ratio (pcr) from mg/g to mg/mmol
- Urine protein-to-creatinine ratio (PCR) mg/mmol → mg/gConvert urine protein-to-creatinine ratio (pcr) from mg/mmol to mg/g
- eGFR (EKFC equation)European Kidney Function Consortium creatinine eGFR, valid from childhood to old age
- KDIGO AKI stagingAcute kidney injury stage from creatinine rise, urine output and dialysis
- Kidney Failure Risk Equation (4-variable)2- or 5-year risk of kidney failure (dialysis / transplant) in CKD G3–G5
- FENa (fractional excretion of sodium)Separate prerenal azotaemia from acute tubular necrosis in oliguric AKI
- FEUrea (fractional excretion of urea)Prerenal vs tubular AKI when the patient has received diuretics
- Creatinine µmol/L → mg/dLConvert serum creatinine from SI (µmol/L) to conventional units (mg/dL)
- Creatinine mg/dL → µmol/LConvert serum creatinine from conventional units (mg/dL) to SI (µmol/L)
- Urea mmol/L → BUN mg/dLConvert SI urea (mmol/L) to US blood urea nitrogen (BUN, mg/dL)
- Urea mg/dL → BUN mg/dLConvert urea in mg/dL (German “Harnstoff”, Turkish “üre”) to blood urea nitrogen (BUN)
- Bedside Schwartz eGFR (children)Estimated GFR in children from height and serum creatinine (CKiD 2009)
- Transtubular potassium gradient (TTKG)Index of distal nephron potassium secretion from urine and plasma K and osmolality
- Creatinine clearance (24-hour urine)Measured creatinine clearance from a timed urine collection and serum creatinine
Gastroenterology / hepatology28
- Appendicitis Inflammatory Response (AIR) scoreProbability of acute appendicitis from clinical signs, WBC, neutrophils and CRP
- Alvarado score (MANTRELS)Clinical score for suspected acute appendicitis
- VITRO score (VWF/platelet ratio)Non-invasive estimate of clinically significant portal hypertension in compensated advanced chronic liver disease
- Baveno VII–VITRO algorithm for CSPHRule in or rule out clinically significant portal hypertension from liver stiffness, platelets and VITRO
- Bilirubin mg/dL → µmol/LConvert bilirubin from mg/dL to µmol/L
- Ammonia µg/dL → µmol/LConvert ammonia from µg/dL to µmol/L
- Ammonia µmol/L → µg/dLConvert ammonia from µmol/L to µg/dL
- Albumin g/dL → g/LConvert albumin from g/dL to g/L
- Albumin g/L → g/dLConvert albumin from g/L to g/dL
- Glasgow-Blatchford scorePre-endoscopy risk in upper GI bleeding — who can be managed as an outpatient
- Rockall score (pre-endoscopy)Clinical Rockall score at presentation in upper GI bleeding, before endoscopy
- Rockall score (complete, post-endoscopy)Mortality and rebleeding risk after endoscopy in upper GI bleeding
- Child-Pugh scoreSeverity of chronic liver disease / cirrhosis (class A, B, C)
- MELD score (UNOS / OPTN)Original MELD — 3-month mortality in end-stage liver disease
- MELD-Na (OPTN 2016)MELD with serum sodium — US liver allocation 2016–2023
- reMELD-Na (Eurotransplant labMELD)Eurotransplant's refitted MELD-Na, used for liver allocation since 25 March 2025
- FIB-4 indexRule out advanced liver fibrosis with routine blood tests (MASLD, viral hepatitis)
- NAFLD fibrosis score (NFS)Advanced fibrosis in fatty liver disease (MASLD/NAFLD)
- BISAP scoreEarly in-hospital mortality risk in acute pancreatitis (first 24 h)
- Maddrey discriminant functionSeverity of alcohol-associated hepatitis — who may benefit from corticosteroids
- Lille modelResponse to corticosteroids on day 7 in severe alcohol-associated hepatitis
- Ranson criteria (acute pancreatitis)Severity of non-gallstone acute pancreatitis at admission and 48 h
- Glasgow–Imrie score (acute pancreatitis)Severity prediction in acute pancreatitis within 48 hours (any aetiology)
- Boey score (perforated peptic ulcer)Operative mortality risk in perforated peptic ulcer
- Mannheim Peritonitis Index (MPI)Mortality risk in secondary peritonitis, scored at laparotomy
- APRI (AST to platelet ratio index)Non-invasive estimate of liver fibrosis and cirrhosis (Wai 2003)
- MELD 3.0MELD updated with sex and albumin (Kim 2021) — US liver allocation since 2023
- Pediatric Appendicitis Score (PAS)Likelihood of appendicitis in children with acute abdominal pain
Metabolic40
- Body mass indexWeight-for-height index
- Anion gapClassification of metabolic acidosis
- Corrected calciumTotal calcium corrected for albumin
- LDL cholesterol (Friedewald)Calculated LDL-C in mmol/L, read against ESC/EAS 2019 targets
- Vitamin D (25-OH) ng/mL → nmol/LConvert vitamin d (25-oh) from ng/mL to nmol/L
- Magnesium mg/dL → mmol/LConvert magnesium from mg/dL to mmol/L
- Magnesium mmol/L → mg/dLConvert magnesium from mmol/L to mg/dL
- Cortisol µg/dL → nmol/LConvert cortisol from µg/dL to nmol/L
- Cortisol nmol/L → µg/dLConvert cortisol from nmol/L to µg/dL
- Testosterone ng/dL → nmol/LConvert testosterone from ng/dL to nmol/L
- Testosterone nmol/L → ng/dLConvert testosterone from nmol/L to ng/dL
- Free T4 (fT4) ng/dL → pmol/LConvert free t4 (ft4) from ng/dL to pmol/L
- Free T4 (fT4) pmol/L → ng/dLConvert free t4 (ft4) from pmol/L to ng/dL
- Free T3 (fT3) pg/mL → pmol/LConvert free t3 (ft3) from pg/mL to pmol/L
- Free T3 (fT3) pmol/L → pg/mLConvert free t3 (ft3) from pmol/L to pg/mL
- C-peptide ng/mL → nmol/LConvert c-peptide from ng/mL to nmol/L
- C-peptide nmol/L → ng/mLConvert c-peptide from nmol/L to ng/mL
- Aldosterone ng/dL → pmol/LConvert aldosterone from ng/dL to pmol/L
- Aldosterone pmol/L → ng/dLConvert aldosterone from pmol/L to ng/dL
- DHEA-S µg/dL → µmol/LConvert dhea-s from µg/dL to µmol/L
- DHEA-S µmol/L → µg/dLConvert dhea-s from µmol/L to µg/dL
- Corrected sodium in hyperglycaemiaSodium corrected for the dilutional effect of high glucose (Hillier factor 2.4)
- Estimated average glucose from HbA1cTranslate HbA1c (IFCC mmol/mol or %) into average glucose in mmol/L (ADAG)
- Winters’ formula (expected pCO₂)Expected respiratory compensation in metabolic acidosis, in mmHg
- Winters’ formula in kPaExpected pCO₂ in metabolic acidosis for blood gas analysers reporting kPa
- Delta ratio (Δ anion gap / Δ HCO₃⁻)Look for a second metabolic disorder alongside a high anion gap acidosis
- Henderson–Hasselbalch pH checkCalculate pH from HCO₃⁻ and pCO₂ to check a blood gas for internal consistency
- Glucose mmol/L → mg/dLConvert blood or plasma glucose from mmol/L to mg/dL
- Glucose mg/dL → mmol/LConvert blood or plasma glucose from mg/dL to mmol/L
- HbA1c % → mmol/molConvert HbA1c from NGSP/DCCT percent to IFCC mmol/mol
- HbA1c mmol/mol → %Convert HbA1c from IFCC mmol/mol to NGSP/DCCT percent
- Cholesterol mmol/L → mg/dLConvert total, LDL or HDL cholesterol from mmol/L to mg/dL
- Triglycerides mmol/L → mg/dLConvert serum triglycerides from mmol/L to mg/dL
- Calcium mmol/L → mg/dLConvert total or ionised calcium from mmol/L to mg/dL
- Calcium mg/dL → mmol/LConvert total or ionised calcium from mg/dL to mmol/L
- 25-OH vitamin D nmol/L → ng/mLConvert 25-hydroxyvitamin D from nmol/L to ng/mL
- Serum osmolality (calculated)Calculated serum osmolality from sodium, glucose and urea
- HOMA-IR (insulin resistance)Homeostasis model assessment of insulin resistance from fasting glucose and insulin
- Free water deficit (hypernatraemia)Estimated water deficit in hypernatraemia from sodium, weight and total body water fraction
- Osmolal gapMeasured minus calculated serum osmolality — screens for unmeasured osmoles
Haematology / oncology / thrombosis15
- ECOG performance statusFunctional status grade (0–5) in patients with cancer
- Karnofsky performance statusFunctional status (0–100 %) with ECOG equivalent
- International Prognostic Index (IPI)Prognosis in aggressive non-Hodgkin lymphoma (DLBCL)
- Revised IPI (R-IPI)Prognosis in DLBCL treated with R-CHOP
- FLIPI (Follicular Lymphoma International Prognostic Index)Risk group at diagnosis of follicular lymphoma
- 4Ts score (heparin-induced thrombocytopenia)Pre-test probability of HIT
- ISTH overt DIC scoreLaboratory score for overt disseminated intravascular coagulation
- PLASMIC scoreLikelihood of severe ADAMTS13 deficiency (TTP) in thrombotic microangiopathy
- HScore (reactive haemophagocytic syndrome)Probability of secondary HLH in adults
- MASCC risk index (febrile neutropenia)Identifies low-risk febrile neutropenia suitable for outpatient care
- CISNE score (Clinical Index of Stable Febrile Neutropenia)Risk of serious complications in apparently stable febrile neutropenia (solid tumours)
- Padua Prediction ScoreVTE risk in hospitalised medical patients — who needs thromboprophylaxis
- Khorana scoreRisk of chemotherapy-associated VTE in ambulatory cancer patients
- Vienna CATS score (CATS/MICA model)6-month risk of cancer-associated VTE from tumour site and D-dimer
- IMPROVE bleeding risk scoreIn-hospital bleeding risk in acutely ill medical patients before thromboprophylaxis
Rheumatology7
- DAS28-ESRDisease Activity Score in 28 joints with ESR — rheumatoid arthritis
- DAS28-CRPDisease Activity Score in 28 joints with CRP — rheumatoid arthritis
- CDAI (Clinical Disease Activity Index)Laboratory-free disease activity in rheumatoid arthritis
- SDAI (Simplified Disease Activity Index)Disease activity in rheumatoid arthritis including CRP
- ASDAS-CRPAxial Spondyloarthritis Disease Activity Score (CRP version)
- 2010 ACR/EULAR rheumatoid arthritis classification criteriaClassifies newly presenting synovitis as definite RA (≥ 6/10 points)
- 2015 ACR/EULAR gout classification criteriaClassifies gout from clinical, laboratory and imaging findings (≥ 8 points)
Psychiatry7
- PHQ-9 (Patient Health Questionnaire-9)Depression severity over the last 2 weeks
- PHQ-2Two-item depression screen (mood and anhedonia)
- GAD-7 (Generalized Anxiety Disorder-7)Anxiety severity over the last 2 weeks
- GAD-2Two-item anxiety screen (core items of the GAD-7)
- AUDIT (Alcohol Use Disorders Identification Test)Hazardous drinking, harmful use and possible dependence (past year)
- AUDIT-CThree-item alcohol consumption screen with sex-specific cut-offs
- CIWA-Ar (alcohol withdrawal)Severity of alcohol withdrawal, for symptom-triggered treatment
Obstetrics / gynaecology9
- Estradiol pg/mL → pmol/LConvert estradiol from pg/mL to pmol/L
- Estradiol pmol/L → pg/mLConvert estradiol from pmol/L to pg/mL
- Progesterone ng/mL → nmol/LConvert progesterone from ng/mL to nmol/L
- Progesterone nmol/L → ng/mLConvert progesterone from nmol/L to ng/mL
- 17-OH progesterone ng/mL → nmol/LConvert 17-oh progesterone from ng/mL to nmol/L
- 17-OH progesterone nmol/L → ng/mLConvert 17-oh progesterone from nmol/L to ng/mL
- Edinburgh Postnatal Depression Scale (EPDS)Screening for perinatal depression (past 7 days)
- APGAR scoreNewborn status at 1 and 5 minutes after birth
- Bishop scoreCervical readiness before induction of labour
Emergency / ICU / surgery23
- NEWS2National Early Warning Score 2 — detecting clinical deterioration in adults (SpO₂ scale 1)
- SOFA scoreSequential (Sepsis-related) Organ Failure Assessment — organ dysfunction for the Sepsis-3 definition
- SIRS criteriaSystemic inflammatory response syndrome (ACCP/SCCM 1992)
- Ottawa ankle rulesNeed for ankle or foot radiographs after acute ankle injury in adults
- ÖGARI pre-operative laboratory tests (Austrian guideline 2026)Which pre-operative blood tests the Austrian ÖGARI guideline recommends by ASA class and surgical category
- SAPS 3 admission scoreICU severity of illness from data within 1 hour of ICU admission
- SAPS 3 predicted hospital mortalityConvert a SAPS 3 admission score into predicted hospital mortality (general or Central/Western Europe equation)
- TISS-28 (Therapeutic Intervention Scoring System)Daily ICU nursing workload from 28 therapeutic activities
- PECARN head injury rule (< 2 years)Need for CT after minor head trauma in children under 2 (GCS 14–15)
- PECARN head injury rule (≥ 2 years)Need for CT after minor head trauma in children aged 2–17 (GCS 14–15)
- Paediatric Glasgow Coma ScaleLevel of consciousness in preverbal children (≤ 2 years)
- APACHE IIICU severity of illness from the worst values in the first 24 hours
- Richmond Agitation-Sedation Scale (RASS)Depth of sedation and agitation in ICU patients
- Apfel score (PONV)Risk of postoperative nausea and vomiting in adults
- Modified Aldrete scoreReadiness for discharge from the post-anaesthesia care unit (PACU)
- Parkland formula (burns)Initial 24-hour crystalloid estimate in major burns
- Holliday–Segar maintenance fluidsDaily maintenance fluid requirement by body weight (100/50/20 rule)
- Revised Trauma Score (RTS)Physiological severity of injury (weighted RTS, 0–7.84)
- Revised Baux score (burns)Burn mortality index combining age, burn size and inhalation injury
- Surgical Apgar ScoreIntraoperative 10-point score for 30-day major complications or death
- Ottawa knee ruleNeed for knee radiographs after acute knee injury in adults
- Kocher criteria (septic arthritis of the hip)Septic arthritis versus transient synovitis in children with an acutely irritable hip
- LRINEC scoreLaboratory risk indicator for necrotising fasciitis in severe soft-tissue infection
Lab values & unit conversion49
- Iron µg/dL → µmol/LConvert iron from µg/dL to µmol/L
- Iron µmol/L → µg/dLConvert iron from µmol/L to µg/dL
- Lactate mg/dL → mmol/LConvert lactate from mg/dL to mmol/L
- Lactate mmol/L → mg/dLConvert lactate from mmol/L to mg/dL
- Vitamin B12 pg/mL → pmol/LConvert vitamin b12 from pg/mL to pmol/L
- Vitamin B12 pmol/L → pg/mLConvert vitamin b12 from pmol/L to pg/mL
- Folate ng/mL → nmol/LConvert folate from ng/mL to nmol/L
- Folate nmol/L → ng/mLConvert folate from nmol/L to ng/mL
- Haemoglobin g/dL → mmol/LConvert haemoglobin from g/dL to mmol/L
- Haemoglobin mmol/L → g/dLConvert haemoglobin from mmol/L to g/dL
- Haemoglobin g/dL → g/LConvert haemoglobin from g/dL to g/L
- Haemoglobin g/L → g/dLConvert haemoglobin from g/L to g/dL
- C-reactive protein (CRP) mg/dL → mg/LConvert c-reactive protein (crp) from mg/dL to mg/L
- C-reactive protein (CRP) mg/L → mg/dLConvert c-reactive protein (crp) from mg/L to mg/dL
- Temperature °F → °CConvert temperature from °F to °C
- Temperature °C → °FConvert temperature from °C to °F
- Body weight lb → kgConvert body weight from lb to kg
- Body weight kg → lbConvert body weight from kg to lb
- Height in → cmConvert height from in to cm
- Height cm → inConvert height from cm to in
- Digoxin ng/mL → nmol/LConvert digoxin from ng/mL to nmol/L
- Digoxin nmol/L → ng/mLConvert digoxin from nmol/L to ng/mL
- Phenytoin µg/mL → µmol/LConvert phenytoin from µg/mL to µmol/L
- Phenytoin µmol/L → µg/mLConvert phenytoin from µmol/L to µg/mL
- Valproate µg/mL → µmol/LConvert valproate from µg/mL to µmol/L
- Valproate µmol/L → µg/mLConvert valproate from µmol/L to µg/mL
- Carbamazepine µg/mL → µmol/LConvert carbamazepine from µg/mL to µmol/L
- Carbamazepine µmol/L → µg/mLConvert carbamazepine from µmol/L to µg/mL
- Theophylline µg/mL → µmol/LConvert theophylline from µg/mL to µmol/L
- Theophylline µmol/L → µg/mLConvert theophylline from µmol/L to µg/mL
- Paracetamol (acetaminophen) mg/L → µmol/LConvert paracetamol (acetaminophen) from mg/L to µmol/L
- Paracetamol (acetaminophen) µmol/L → mg/LConvert paracetamol (acetaminophen) from µmol/L to mg/L
- Ethanol mg/dL → mmol/LConvert ethanol from mg/dL to mmol/L
- Ethanol mmol/L → mg/dLConvert ethanol from mmol/L to mg/dL
- Copper µg/dL → µmol/LConvert copper from µg/dL to µmol/L
- Copper µmol/L → µg/dLConvert copper from µmol/L to µg/dL
- Zinc µg/dL → µmol/LConvert zinc from µg/dL to µmol/L
- Zinc µmol/L → µg/dLConvert zinc from µmol/L to µg/dL
- Total protein g/dL → g/LConvert total protein from g/dL to g/L
- Total protein g/L → g/dLConvert total protein from g/L to g/dL
- Fibrinogen mg/dL → g/LConvert fibrinogen from mg/dL to g/L
- Fibrinogen g/L → mg/dLConvert fibrinogen from g/L to mg/dL
- D-dimer µg/mL → ng/mLConvert d-dimer from µg/mL to ng/mL
- D-dimer ng/mL → µg/mLConvert d-dimer from ng/mL to µg/mL
- Absolute neutrophil count (ANC)Neutrophils per litre from the white cell count and differential, with neutropenia grade
- Reticulocyte production index (RPI)Correct the reticulocyte percentage for anaemia and early release to judge marrow response
- Bilirubin µmol/L → mg/dLConvert total or direct bilirubin from µmol/L to mg/dL
- Corticosteroid conversion (prednisolone equivalent)Convert a systemic glucocorticoid dose to its prednisolone-equivalent dose
- Mentzer indexMCV ÷ red cell count — iron deficiency vs thalassaemia trait in microcytosis
General4
- Body surface area (Mosteller / DuBois)Body surface area from height and weight
- Charlson Comorbidity Index (CCI)Comorbidity burden and 1-year mortality (original 1987 weights)
- Adjusted body weightIdeal body weight (Devine) plus 40 % of the excess weight, for overweight patients
- Lean body weight (Janmahasatian)Fat-free mass from sex, weight and height (Janmahasatian 2005)