A-a Gradient
 
a/A Ratio
 
AaPO2 Correction for FIO2
 
Absolute Eosinophil Count
 
Absolute Lymphocyte Count
 
Absolute Neutrophil Count
 
Absolute Phagocyte Count
 
Absolute Reticulocyte Count
 
Acute Heart Failure Prediction Based on NT-proBNP and Clinical Features
 
Adjusted Cerebrospinal Fluid White Blood Cell Count in the Presence of Red Blood Cells
 
Albumin-bilirubin (ALBI) grade estimate of survival of adults with hepatocellular carcinoma (conventional and SI units)
 
Allowable Blood Loss
 
Aminoglycoside Clearance Estimate
 
Anion Gap Delta Delta Gradient Multicalc
 
Anion Gap Delta Delta Ratio Multicalc
 
Anion Gap in Hypoalbumin States
 
Anion Gap
 
Aris birth weight-for-gestational age percentiles, singletons, 22 to 42 weeks gestation
 
Ascites Albumin Gradient
 

Basal Energy Expenditure (Harris-Benedict estimation)
 
Basal metabolic rate (BMR) using Schofield equations in children and adolescents
 
Base Excess Determination
 
Bayesian Statistics I MultiCalc
 
Bayesian Statistics II MultiCalc
 
Benefit Increase / Number Needed to Treat Multicalc
 
Bicarbonate Deficit
 
Blood Ethanol Concentration Estimation
 
Blood pressure percentiles, 0 to 17 years (2017 standard)
 
Body mass index (BMI) percentiles and Z-scores, females 2 to 20 years (CDC)
 
Body mass index (BMI) percentiles and Z-scores, males 2 to 20 years (CDC)
 
Body Mass Index for Adults (BMI Quetelet's Index)
 
Body Mass Index for Adults (BMI Quetelet's Index, Metric)
 
Body Surface Area (BSA, Du Bois Method)
 
Body Surface Area (BSA, Gehan and George Method)
 
Body Surface Area (BSA, Mosteller, square root method)
 
Body Surface Area Based Dosing
 
Burn Injury Fluid Resuscitation (Brooke estimate)
 
Burn Injury Fluid Resuscitation (Demling dextran estimate)
 
Burn Injury Fluid Resuscitation (Evans estimate)
 
Burn Injury Fluid Resuscitation (Modified Brooke crystalloid estimate)
 
Burn Injury Fluid Resuscitation, Adult (Parkland crystalloid estimate)
 

Calcium Correction in Hypoalbuminemia (SI units)
 
Calcium Correction in Hypoalbuminemia
 
Calorie Requirements for Weight Maintenance and Weight Loss in Adult Females (Patient information)
 
Calorie Requirements for Weight Maintenance and Weight Loss in Adult Males (Patient information)
 
Carbon Dioxide Production
 
Cardiac Output MultiCalc
 
Cardiac Output Using Oxygen Saturation Data Only
 
Cardiac Output
 
Cardiac Power Output: CPO
 
CDC height-for-age percentiles for females, 2 to 20 years
 
CDC height-for-age percentiles for males, 2 to 20 years
 
CDC infant growth percentiles, 0 to 36 months
 
CDC infant head circumference-for-age percentiles, 0 to 36 months
 
CDC infant length-for-age percentiles, 0 to 36 months
 
CDC infant weight-for-age percentiles, 0 to 36 months
 
CDC infant weight-for-length percentiles, 0 to 36 months
 
CDC weight-for-age percentiles for females, 2 to 20 years
 
CDC weight-for-age percentiles for males, 2 to 20 years
 
CDC weight-for-height percentiles for females, 77 to 121 cm
 
CDC weight-for-height percentiles for males, 77 to 121 cm
 
Chi Square Analysis
 
Closing Capacity to Total Lung Volume Capacity
 
Closing Capacity
 
Closing Volume to Vital Capacity Ratio
 
Confidence Interval of a Binomial Proportion
 
Confidence Interval of a Difference Between Proportions
 
Confidence Interval of a Ratio of Proportions
 
Confidence Interval of a Ratio of Ratios
 
Confidence Interval of a Survey
 
COPE Statistic Adding Cost to Number Needed to Treat
 
Corrected/Adjusted Age of Preterm Infants
 
Cost of Smoking
 
Creatinine Clearance (measured)
 
Creatinine Clearance (measured, SI units)
 
Creatinine Clearance by Mass
 
Creatinine Clearance Estimate by Cockcroft-Gault Equation (SI units)
 
Creatinine Clearance Estimate by Cockcroft-Gault Equation with Ideal Body Weight
 
Creatinine Clearance Estimate by Cockcroft-Gault Equation
 
Creatinine Clearance Estimate by Jelliffe Formula
 
Creatinine Clearance Estimate by Sanaka Formula (for older subjects with low muscle mass)
 
Creatinine Kinetics MultiCalc
 
CSF IgG Index
 
CSF Protein Concentration Correction in Blood Contaminated CSF
 

Diffusing capacity for carbon monoxide (DLCO) corrected for anemia
 
Diffusing capacity for carbon monoxide (DLCO) correction of predicted value for anemia (SI units)
 
Digitalis Body Load
 
Dose Adjustment for Body Surface Area
 
Dose Driven IV-Drip Rate Calculator
 
Dynamic International Prognostic Scoring System-Plus (DIPSS-Plus) for Primary Myelofibrosis (PMF) in Adults and Adolescents
 

Endotracheal tube size for children (Age 1 to 8 years)
 
Energy Loss Index and the Severity of Asymptomatic Aortic Stenosis
 
England Fraser Index for Differentiating Beta-thalassemia Trait from Iron-deficiency
 
Epidural Formulation Compounding Calculator
 
Estimated Blood Volume
 
Estimated Date of Delivery (EDD) by LMP and Ultrasound
 
Estimated Delivery Date (Patient information)
 
Estimated energy requirement (EER) for females, birth to 18 years (revised 2023)
 
Estimated energy requirement (EER) for males, birth to 18 years (revised 2023)
 
EUTOS long-term survival (ELTS) score in adults with chronic myeloid leukemia (conventional and SI units)
 

False Negative Rate from Sensitivity and Prevalence
 
False Negative Ratio from Sensitivity and Prevalence
 
False Positive Rate from Specificity and Prevalence
 
False Positive Ratio from Specificity and Prevalence
 
Fat Free Mass, a Measure of Lean Body Weight
 
Fenton weight-for-gestational age percentiles, 22 to 50 weeks gestation (2007, not sex-specific)
 
Fractional Excretion of Amylase (Amylase to creatinine clearance ratio)
 
Fractional Excretion of Calcium (FECa)
 
Fractional Excretion of Magnesium (SI units)
 
Fractional Excretion of Magnesium
 
Fractional excretion of phosphate (FePO₄)
 
Fractional Excretion of Sodium (FENa)
 
Fractional Excretion of Sodium (FENa, SI units)
 
Fractional Excretion of Urate
 
Fractional Excretion of Urea (FEUrea)
 
Friedewald Equation for Low Density Lipoprotein (LDL-C)
 
Friedewald Equation for Low Density Lipoprotein (LDL-C, SI units)
 
Functional Residual Capacity
 

Gestational Age from Estimated Date of Delivery (EDD)
 
Glomerular Filtration Rate Estimation (eGFR) by AASK Equation
 
Glomerular Filtration Rate Estimation (eGFR) by CKD-EPI Equation (2009)
 
Glomerular Filtration Rate Estimation (eGFR) by CKD-EPI Equation with Creatinine and Cystatin C, without Race (2021)
 
Glomerular Filtration Rate Estimation (eGFR) by CKD-EPI Equation with Creatinine, without Race (2021)
 
Glomerular Filtration Rate Estimation (eGFR) by CKD-EPI Equation with Cystatin C, without Race (2012)
 
Glomerular Filtration Rate Estimation (eGFR) by CKiD U25 Equations with Creatinine and/or Cystatin C in Children and Adults ≤25 Years Old (2021)
 
Glomerular Filtration Rate Estimation (eGFR) by Quadratic Equation
 
Glomerular Filtration Rate Estimation (eGFR) by Schwartz Formula
 
Glomerular Filtration Rate Estimation (eGFR) by the Abbreviated MDRD Study Equation (SI units)
 
Glomerular Filtration Rate Estimation (eGFR) by the Abbreviated MDRD Study Equation
 
Glomerular Filtration Rate Estimation (eGFR) by the IDMS-Traceable MDRD Study Equation
 
Glomerular Filtration Rate Estimation (eGFR) by the MDRD Equation (SI units)
 
Glomerular Filtration Rate Estimation (eGFR) by the MDRD Equation
 
Glomerular Filtration Rate Estimation (eGFR) by Updated Schwartz Formula
 
Glucose Management Indicator (GMI)
 
Glycemic Assessment: A1C to Average Glucose Conversions
 
GNRI: Geriatric Nutritional Risk Index
 
Gorlin Formula for Valve Area
 
Gravity Flow Rate Calculator
 
Green King Index for Differentiating Beta-thalassemia Trait from Iron-deficiency
 

Height Potential: A Child's Target Height Based on Midparental Height
 
Henderson-Hasselbach Equation
 
Hepatitis C Fibrosis Prediction Score
 
HOMA Formula: Homeostasis Model Assessment of Insulin Resistance
 
Housestaff Activity Index
 
Hyponatremia Correction Infusate Rate
 

Ideal body weight (method of Devine) and adjusted body weight for adults
 
Ideal Body Weight (method of Lorenz)
 
Ideal body weight in adults (body mass index [BMI]-based)
 
Ideal Body Weight Percentage
 
In-Flight PaO2 Estimation (using PFT's)
 
In-Flight PaO2 Estimation
 
Injury Severity Score (ISS)
 
Inspiratory Capacity
 
International Normalized Ratio of Prothrombin Time (INR)
 
IV Drip Maintenance Rate Calculator
 

Kappa Measurement of Inter-observer Agreement MultiCalc
 
Kappa Measurement of Inter-observer Agreement: Bennett's Kappa
 
Kappa Measurement of Inter-observer Agreement: Cohen's Kappa
 
Kappa Measurement of Inter-observer Agreement: Scott's Kappa
 
Kt/V Dialysis Dose Barth Formula
 
Kt/V Dialysis Dose Basile Formula
 
Kt/V Dialysis Dose Daugirdas Formula
 
Kt/V Dialysis Dose Formulae MultiCalc
 
Kt/V Dialysis Dose Jindal Formula
 
Kt/V Dialysis Dose Kerr Formula
 
Kt/V Dialysis Dose Keshaviah Formula
 
Kt/V Dialysis Dose Lowrie Formula
 

Lactate-Albumin Ratio (LAR) in Severe Pancreatitis with Acute Kidney Injury
 
Lean Body Weight (Female)
 
Lean Body Weight (Male)
 
Lean Body Weight Based on Creatinine Production
 
Likelihood Ratio MultiCalc
 
Likelihood Ratio of Negative from Raw Data
 
Likelihood Ratio of Positive from Raw Data
 
Lipoprotein Insulin Resistance Index (LPIR Index)
 
Lung Age Estimation for Smoking Cessation Counseling
 
Lung Volume Multicalc
 

Maintenance fluid calculation for children based on daily fluid requirements
 
Maintenance Fluid Calculation for Children Based on Hourly Fluid Requirements
 
Mantle Cell Lymphoma International Prognostic Index (MIPI)
 
Martin Equation for Low Density Lipoprotein (LDL-C)
 
Mean Arterial Pressure (MAP) in Adults and Children (conventional or SI units)
 
Mean Corpuscular Hemoglobin Concentration
 
Mean Corpuscular Hemoglobin
 
Mean Corpuscular Volume
 
Mean Vascular Pressure (systemic or pulmonary)
 
MELD 3.0 Score EXCLUDING Serum Albumin
 
MELD 3.0 Score Including Serum Albumin
 
MELD/MELDNa scores (2016)(SI units)
 
MELD/MELDNa scores (2016)
 
Mifflin-St Jeor Resting Energy Expenditure (REE)
 
Model for Endstage Liver Disease (MELD) score in adults (not for liver transplantation listing purposes) (conventional units)
 
Model for Endstage Liver Disease (MELD) score in adults (not for liver transplantation listing purposes) (SI units)
 
Moser Discriminant Function for X-ALD
 

Nasal Cannula Oxygen Fractional Inspired O₂ (FiO₂) Estimate
 
Negative Predictive Value from Raw Data
 
Negative Predictive Value of a Test
 
NIH Chronic Prostatitis Symptom Index
 
Normal Range for Body Weight
 
Number Needed to Harm (NNH) from Odds Ratio (OR) and Patient Expected Event Rate (PEER)
 
Number Needed to Treat (NNT) from Odds Ratio (OR) and Patient Expected Event Rate (PEER)
 

Odds from Probability
 
Odds Ratio and Relative Risk
 
Olsen infant BMI-for-gestational-age percentiles, 24 to 41 weeks gestation
 
Olsen infant head circumference-for-gestational-age percentiles, 23 to 41 weeks gestation
 
Olsen infant length-for-gestational-age percentiles, 23 to 41 weeks gestation
 
Olsen infant weight-for-gestational-age percentiles, 23 to 41 weeks gestation
 
Osmolal Gap Calculator (SI units)
 
Osmolal Gap Calculator
 
Osmolality Estimator (serum)
 
Osmolar Clearance
 
Overall Accuracy of a Test from Raw Data
 
Overall Accuracy of a Test from Sensitivity, Specificity and Prevalence
 
Oxygen Consumption
 
Oxygen Content of Arterial Blood
 
Oxygen Content of Venous Blood
 
Oxygen Saturation Estimate from PO2
 
Oxygenation index in neonates, children, and adults
 

PaO2 / FIO2 Ratio (for MODS Calculation)
 
PaO2 Correction for FIO2
 
PASI Psoriasis Area and Severity Index
 
Peak Expiratory Flow Prediction in adults
 
Peak expiratory flow prediction in females (18 to 85 years)
 
Peak expiratory flow prediction in females (5 to <18 years)
 
Peak expiratory flow prediction in males (18 to 85 years)
 
Peak expiratory flow prediction in males, 5 to <18 years
 
Peak Expiratory Flow Variability in Asthma
 
PELD Score for End-Stage Liver Disease in patients less than 12 years old (original)
 
PELD-Cr Score for End-stage Liver Disease in patients less than 12 years old (2023 update)
 
Penn State Equations for Resting Energy Expenditure in Critically Ill Patients
 
PFT Adjusted Predicted Values for Adult Females MultiCalc
 
PFT Adjusted Predicted Values for Adult Males MultiCalc
 
PFT predicted values by 2022 race-neutral GLI equations, ages 3 to 95
 
PFT Predicted Values for Adult Females MultiCalc
 
PFT Predicted Values for Adult Males MultiCalc
 
PFT Predicted Values for Pediatric Females MultiCalc
 
PFT Predicted Values for Pediatric Males MultiCalc
 
Phenytoin Free (Unbound) Drug Level (Adjusted for Hypoalbuminemia, Dasgupta, 1991)
 
Phenytoin Total Drug Level (Adjusted for Hypoalbuminemia and Renal Function)
 
Pneumothorax Degree of Collapse
 
Positive Predictive Value from Raw Data
 
Positive Predictive Value of a Test
 
Post Test Odds from Pre Test Odds and Likelihood Ratio MultiCalc
 
Post Test Odds of a Negative from Raw Data
 
Post Test Odds of a Negative Result from Sensitivity Specificity and Prevalence
 
Post Test Odds of a Positive from Raw Data
 
Post Test Odds of a Positive Result from Sensitivity Specificity and Prevalence
 
Post Test Probability from Pre Test Probability, Sensitivity and Specificity
 
Post-Test Probability from Likelihood Ratios and Multiple Test Results
 
Post-Test Probability from Sensitivity and Specificity of Multiple Test Results
 
Pre Test Odds from Prevalence
 
Pre Test Odds from Raw Data
 
Predicted body weight and tidal volume in adults
 
Predicted postoperative DLCO following lung resection surgery (anatomic method) in adults
 
Predicted postoperative DLCO following lung resection surgery (diffusion method) in adults
 
Predicted postoperative FEV1 following lung resection surgery (anatomic method)
 
Predicted postoperative FEV1 following lung resection surgery (perfusion method)
 
Predicted total lung capacity (pTLC) in adults
 
Pregnancy Gestation by LMP and Ultrasound Biometry
 
Pressure Adjusted Heart Rate (For MODS calculation)
 
Prevalence of a Finding or Disease from Test Data
 
Probability from Odds
 
Probability of heart failure with preserved ejection fraction (H₂FPEF score) in adults with dyspnea
 
Protein Bound Calcium
 
Protein Catabolic Rate (normalized PCR)
 
Protein Catabolic Rate
 
Pulmonary Artery Pulsatility Index: PAPi
 
Pulmonary Vascular Resistance
 
Pulse Pressure Variation (percentage)
 

QT Interval Correction (EKG, Bazett Equation)
 
QT Interval Correction (EKG, Multi-Equation)
 
QUICKI Formula for Insulin Resistance
 

Renal Failure Index
 
Residual Renal Function in Hemodialysis Patients (Kru)
 
Residual Volume to Total Lung Capacity Ratio
 
Respiratory Quotient
 
Reticulocyte Production Index
 
Right to Left Shunt Fraction Qs/Qt
 
Right Ventricular Systolic Pressure (RVSP) in Tricuspid Regurgitation
 
Risk Increase / Number Needed to Harm Multicalc
 
Risk Reduction / Number Needed to Treat Multicalc
 
ROX Index (Respiratory rate--oxygenation)
 

SALT Score for the Severity of Alopecia Areata
 
Sampson Equation for Low Density Lipoprotein (LDL-C)
 
Sensitivity of a Test
 
Serum Sodium Concentration Change Considering Infused and Excreted Cations
 
Sodium Change in Hyperproteinemia
 
Sodium Change in Hypertriglyceridemia
 
Sodium Concentration Correction for Hyperglycemia (Emmett 2013)(conventional or SI units)
 
Sodium Correction in Hyperglycemia (Hillier 1999)
 
Sodium Correction in Hyperglycemia (Katz 1973)
 
Sodium Deficit in Hyponatremia
 
Specificity of a Test
 
Stool Osmolal Gap
 
Survey Sample Size with Population Correction
 
Survey Sample Size
 
Systemic Vascular Resistance
 
Systolic Pressure Variation (percentage)
 

Time Averaged Concentration of Urea in Hemodialysis
 
TIPS Risk predictor / Survival predictor (Transjugular Intrahepatic Portosystemic Shunt)
 
Total Body Water (BIA formula)
 
Total Body Water Estimation Based on Weight Alone
 
Total Body Water in Adult Females (Humes-Weyer formula)
 
Total Body Water in Adult Females (Johansson formula)
 
Total Body Water in Adult Females (Lee formula)
 
Total Body Water in Adult Females (Watson formula)
 
Total Body Water in Adult Males (Humes-Weyer formula)
 
Total Body Water in Adult Males (Johansson formula)
 
Total Body Water in Adult Males (Lee formula)
 
Total Body Water in Adult Males (Watson formula)
 
Total Daily Energy Requirement Estimate
 
Total Lung Capacity
 
Transferrin Receptor-Ferritin Index for Diagnosis of Iron deficiency Anemia
 
Transferrin Saturation
 
Transtubular Potassium Gradient at CCD
 
True Negative Ratio from Specificity and Prevalence
 
True Positive Ratio from Sensitivity and Prevalence
 

Urea Reduction Percentage in Hemodialysis (PRU)
 
Urea Reduction Ratio in Hemodialysis (URR)
 
Urinary Protein Excretion Estimation
 
Urine anion gap
 
Urine osmolal gap (UOG) (SI units)
 
Urine osmolal gap (UOG)
 

Ventilation Index
 
Very Low Density Lipoprotein (VLDL)
 
Vital Capacity
 
Volume of Distribution of Urea
 

Waist to Hip Ratio
 
Water Deficit in Hypernatremia
 
Weight Based Divided Dose Calculator
 
Weight Based Dosage Calculator
 
Weight Loss Indices Following Bariatric Surgery in Adults
 
WHO assessment of malnutrition in females, 0 to 24 months
 
WHO assessment of malnutrition in females, 2 to 5 years
 
WHO assessment of malnutrition in males, 0 to 24 months
 
WHO assessment of malnutrition in males, 2 to 5 years
 
WHO infant growth percentiles, 0 to 24 months
 
WHO infant head circumference-for-age percentiles, 0 to 24 months
 
WHO infant length-for-age percentiles, 0 to 24 months
 
WHO infant weight-for-age percentiles, 0 to 24 months
 
WHO infant weight-for-length percentiles, 0 to 24 months
 
Winters' Formula for Expected PCO2
 

Z-Score to Percentile Estimation by Cumulative Density Function
 
Z-Score to Percentile Estimation by Inverse Logit Function for Logistic Regression