NOTE: All calculations must be re-checked and should not be used alone to guide patient care. See disclaimer.
Cardiology
Critical Care
Endocrinology
Gastroenterology
Hematology/Oncology
Hepatology
Infectious Disease
Nephrology
Neurology
OB-Gyn
Orthopedics
Pediatrics
Pulmonology
Surgery
Cardiac
Endocrine/Metabolic
Gastrointestinal
Hematology
Immunology
Musculoskeletal
Neurologic
Renal
Respiratory
No favorites yet. Add some by clicking the plus sign on an Equation page.
Absolute Neutrophil Count (ANC)
Units:
US
SI
Modified Centor Score for Strep Pharyngitis
Patient Age Range (not valid for <2)
3-14 years old
+1
15-44 years old
0
≥ 45 years old
-1
Exudate or Swelling on Tonsils?
Yes
+1
Tender/swollen anterior cervical lymph nodes?
Yes
+1
Fever? (T > 38° C, 100.4° F)
Yes
+1
Absence of Cough?
Yes
+1
Probability of Strep Pharyngitis
Source:
Empirical Validation of Guidelines for the Management of Pharyngitis in Children and Adults.
Posted in:
General
Equations
A-a O2 Gradient
Absolute Neutrophil Count (ANC)
Absolute Reticulocyte Count (Reticulocyte Index)
Age
Anion Gap
Basal Energy Expenditure
Bayesian Sensitivty, Specificity, Probabilities
Bicarbonate Deficit
BMI and Body Surface Area (BSA)
Calcium Correction for Hypoalbuminemia
Corrected QT Interval (QTc)
Creatinine Clearance (Cockcroft-Gault Equation)
CSF WBC Correction for RBCs
Endotracheal Tube (ETT) Size for Pediatrics
Fractional Excretion of Sodium (FENa)
Fractional Excretion of Urea (FEUrea)
Free Water Deficit in Hypernatremia
Ideal Body Weight
LDL Calculated
Maintenance Fluids Calculations
MDRD GFR Equation
Mean Arterial Pressure (MAP)
Oxygenation Index
Parkland Formula for Burns
Pediatric Ins and Outs (per kg and per hour)
Phenytoin/Dilantin Correction for Albumin or Renal Failure
Pregnancy Due Dates Calculator
Serum Osmolality/Osmolarity
Sodium Correction for Hyperglycemia
Sodium Correction Rate in Hyponatremia
Sodium Deficit in Hyponatremia
Stool Osmolar/Osmotic Gap
Transtubular Potassium Gradient (TTKG)
Winters’ Formula for Metabolic Acidosis Compensation
Scores
ABCD2 Score for TIA
APACHE II Score for ICU Mortality
APGAR Score
CHADS2 Score for Atrial Fibrillation Stroke Risk
Child-Pugh Score for Cirrhosis Mortality
CURB-65 Severity Score for Community-Acquired Pneumonia
Framingham Cardiac Risk Score
Framingham Cardiac Risk Score (SI Units)
Glasgow Coma Scale/Score
Glasgow-Blatchford Bleeding Score (GBS)
Hunt and Hess Classification of Subarachnoid Hemorrhage (SAH)
Intracerebral Hemorrhage (ICH) Score
Maddrey’s Discriminant Function for Alcoholic Hepatitis
MELD Score (Model For End-Stage Liver Disease) (12 and older)
Modified Centor Score for Strep Pharyngitis
Ottawa and Pittsburgh Knee Rules
Ottawa Ankle Rules
Parkland Formula for Burns
PELD Score (Pediatric End-Stage Liver Disease) (younger than 12)
PERC Rule for Pulmonary Embolism
PSI/PORT Score: Pneumonia Severity Index for Adult CAP
Ranson’s Criteria for Pancreatitis Mortality
San Francisco Syncope Rule to Predict Serious Outcomes
TIMI Risk Score for STEMI
TIMI Risk Score for UA/NSTEMI
Well’s Criteria for DVT
Well’s Criteria for Pulmonary Embolism / PE
Intubation Supplies
Diagnostic Instruments
Anesthesia Supplies
ECG Supplies
Cautery Supplies