Health Calculators
Health calculators are screening tools, not diagnoses. Each page says plainly what its number can and cannot tell you.
378 calculators in 21 subjects.
Anesthesia and Emergency Critical Care
- APACHE II Mortality Predictorstub
- CURB-65 Pneumonia Severity Mortality Risk Toolstub
- Defibrillation Energy Joule Selection Weight Matrixstub
- Endotracheal Tube Sizing Pediatric Depth Calculatorstub
- Geneva Score Pulmonary Embolism Diagnostic Screenerstub
- Intracranial Pressure and Cerebral Perfusion Pressure Toolstub
- Local Anesthetic Maximum Safe Dose Lidocaine Toolstub
- Parkland Burn Formula First 24-Hour Fluid Resuscitation Toolstub
- SOFA Sequential Organ Failure Assessment Sepsis Scorestub
- Wells Score Pulmonary Embolism Probability Matrixstub
Body Composition and Energy
- BMI Standard and Metric Calculatorstub
- BMR Harris-Benedict Formula Toolstub
- Body Surface Area Mosteller Formula Toolstub
- Ideal Body Weight Devine Formula Calculatorstub
- Lean Body Mass Boer Formula Toolstub
- Macro Split Gram Target Matrixstub
- Navy Body Fat Percentage Calculator (Tape Measure Method)stub
- Target Caloric Intake Weight Loss and Gain Calculatorstub
- TDEE Activity Multiplier Calculatorstub
- Waist-to-Hip Ratio Cardiovascular Health Risk Analyzerstub
Cardiology and Vascular Risk Modeling
- ASCVD Lifetime Risk Toolstub
- Corrected QT Interval (QTc) Bazett Formula Toolstub
- CRUSADE Bleeding Risk Score Coronary Angiography Matrixstub
- Duke Treadmill Score Exercise Stress Test Prognostic Toolstub
- Framingham 10-Year Cardiovascular Risk Probability Vectorstub
- GRACE Acute Coronary Syndrome Mortality Predictorstub
- HEART Score Chest Pain Emergency Risk Stratificationstub
- Sgarbossa Criteria LBBB Myocardial Infarction Scalestub
- Shock Index Heart Rate to Systolic Blood Pressure Ratio Toolstub
Clinical dosing and scores
- ABCD2 Score Calculatorstub
- AHA PREVENT Cardiovascular Risk Calculatorstub
- Alvarado Score Calculatorstub
- Alveolar-Arterial Oxygen Gradient Calculatorstub
- Aminoglycoside Dosing Calculatorstub
- Anion Gap Calculatorstub
- APACHE II Score Calculatorstub
- APRI Score Calculatorstub
- Arterial Blood Gas Interpretation Calculatorstub
- ASCVD 10-Year Risk Calculator (Pooled Cohort Equations)stub
- BISAP Score Calculatorstub
- Blood Transfusion Volume Calculatorstub
- Burn Total Body Surface Area Calculatorstub
- Cardiac Output and Cardiac Index Calculatorstub
- Centor and McIsaac Score Calculatorstub
- CHA2DS2-VASc Score Calculatorstub
- Chemotherapy BSA Dosing Calculatorstub
- Child-Pugh Score Calculatorstub
- Cholesterol Ratio Calculatorstub
- Clinical Laboratory Unit Converterstub
- Corrected Calcium Calculatorstub
- Corrected Phenytoin and Drug Level Calculatorstub
- Corrected Reticulocyte Count and Production Index Calculatorstub
- Corrected Sodium in Hyperglycemia Calculatorstub
- Creatinine Clearance Calculator (Cockcroft-Gault)stub
- CURB-65 Pneumonia Severity Calculatorstub
- Dialysis Adequacy Kt/V Calculatorstub
- Drug Half-Life and Steady State Calculatorstub
- eGFR Calculator (CKD-EPI 2021)stub
- eGFR Calculator (CKD-EPI Cystatin C and Combined)stub
- eGFR Calculator (MDRD Study Equation)stub
- FeverPAIN Score Calculatorstub
- FIB-4 Index Calculatorstub
- Framingham Risk Score Calculatorstub
- FRAX Fracture Risk Calculatorstub
- Garvan Fracture Risk Calculator Explainerstub
- Glasgow Coma Scale Calculatorstub
- Glasgow-Blatchford Bleeding Score Calculatorstub
- GRACE ACS Risk Score Calculatorstub
- HAS-BLED Bleeding Risk Calculatorstub
- HbA1c to Average Glucose Calculatorstub
- HEART Score Calculatorstub
- Heparin Infusion Dosing Calculatorstub
- HOMA-IR and HOMA-B Calculatorstub
- Hyponatremia Sodium Correction Rate Calculatorstub
- Insulin Correction Factor and Carb Ratio Calculatorstub
- Iron Deficit Calculator (Ganzoni Formula)stub
- LDL Cholesterol Calculator (Friedewald and Martin-Hopkins)stub
- Maintenance IV Fluid Calculator (Holliday-Segar)stub
- Mean Arterial Pressure Calculatorstub
- MELD 3.0 Calculatorstub
- MELD-Na Calculatorstub
- Metabolic Syndrome Criteria Calculatorstub
- Morphine Milligram Equivalent Calculatorstub
- NAFLD Fibrosis Score Calculatorstub
- NEWS2 Early Warning Score Calculatorstub
- NIH Stroke Scale Calculatorstub
- Opioid Rotation and Conversion Calculatorstub
- Ottawa Ankle and Knee Rules Calculatorstub
- PaO2/FiO2 Ratio and ARDS Severity Calculatorstub
- Parkland Formula Burn Fluid Calculatorstub
- Pediatric eGFR Calculator (Bedside Schwartz)stub
- Pediatric Weight-Based Dosing Calculatorstub
- PERC Rule Calculatorstub
- Potassium and Magnesium Replacement Calculatorstub
- QRISK3 Cardiovascular Risk Calculatorstub
- qSOFA Screening Calculatorstub
- QTc Calculator (Bazett)stub
- QTc Calculator (Framingham and Hodges)stub
- QTc Calculator (Fridericia)stub
- Ranson Criteria Calculatorstub
- SCORE2 and SCORE2-OP Cardiovascular Risk Calculatorstub
- Serum Osmolality and Osmolal Gap Calculatorstub
- SOFA Score Calculatorstub
- TIMI Risk Score Calculatorstub
- Transferrin Saturation and Iron Studies Calculatorstub
- Type 2 Diabetes Risk Score Calculator (FINDRISC and ADA)stub
- Urine Output Rate Calculatorstub
- Vancomycin AUC Dosing Calculatorstub
- Ventilator Tidal Volume Calculator (Predicted Body Weight)stub
- Warfarin Dose Adjustment and INR Calculatorstub
- Wells Score Calculator for Deep Vein Thrombosisstub
- Wells Score Calculator for Pulmonary Embolismstub
Clinical Medicine and Pharmacology
- CHA2DS2-VASc Score Stroke Risk Stratification Toolstub
- Creatinine Clearance Cockcroft-Gault Equation Toolstub
- Drug Half-Life Elimination Clearance Concentration Toolstub
- GFR CKD-EPI Kidney Function Toolstub
- Glasgow Coma Scale (GCS) Neurological Injury Matrixstub
- HAS-BLED Bleeding Risk Atrial Fibrillation Toolstub
- IV Drip Rate Micro-to-Macro Infusion Drop Counterstub
- MELD Score Calculatorstub
- Opioid Morphine Milligram Equivalent (MME) Conversion Toolstub
- TIMI Risk Score Myocardial Infarction Survival Toolstub
Endocrinology and Diabetes Management
- Calcium-Creatinine Clearance Ratio Toolstub
- Corrected Sodium Hyperglycemia Lab Gap Adjuster Toolstub
- Cortisol Suppression Dexamethasone Lab Cutoff Interpreterstub
- Free Testosterone Calculation Modelerstub
- HOMA-IR Insulin Resistance Vectorstub
- Insulin Sensitivity Factor Correction Bolus Calculatorstub
- Insulin-to-Carbohydrate Ratio Mealtime Dose Calculatorstub
- Serum Ascites Albumin Gradient Portal Hypertension Toolstub
- Thyroid Volume Ultrasound Ellipsoid Calculatorstub
- Urinary Albumin-to-Creatinine Ratio Nephropathy Toolstub
Energy and body composition
- A Body Shape Index Calculatorstub
- Adjusted Body Weight Calculatorstub
- Bariatric Surgery Weight Loss Projection Calculatorstub
- Bioelectrical Impedance Body Fat Calculatorstub
- BMI Calculator With WHO Asian Cutoffsstub
- BMI Prime Calculatorstub
- BMR Calculator (Mifflin-St Jeor)stub
- Body Adiposity Index Calculatorstub
- Body Fat Calculator (Durnin-Womersley)stub
- Body Fat Calculator (Jackson-Pollock 3-Site)stub
- Body Fat Calculator (Jackson-Pollock 4-Site)stub
- Body Fat Calculator (Jackson-Pollock 7-Site)stub
- Body Fat Calculator (US Navy Method)stub
- Body Frame Size Calculatorstub
- Body Recomposition Calculatorstub
- Body Surface Area Calculator (Boyd)stub
- Body Surface Area Calculator (Du Bois)stub
- Body Surface Area Calculator (Haycock)stub
- Body Surface Area Calculator (Mosteller)stub
- Cunningham Equation Calculatorstub
- Fat-Free Mass Index Calculatorstub
- Harris-Benedict Calculator (Revised)stub
- Ideal Body Weight Calculator (Devine)stub
- Ideal Body Weight Calculator (Hamwi)stub
- Ideal Body Weight Calculator (Miller)stub
- Ideal Body Weight Calculator (Robinson)stub
- Katch-McArdle BMR Calculatorstub
- Lean Body Mass Calculator (Boer, James, Hume)stub
- Ponderal Index Calculatorstub
- Relative Fat Mass Calculatorstub
- TDEE Calculator (Total Daily Energy Expenditure)stub
- Waist-to-Height Ratio Calculatorstub
- Waist-to-Hip Ratio Calculatorstub
- Weight Loss Goal Date Calculatorstub
Everyday health
- Alcohol Spending and Sober Savings Calculatorstub
- AUDIT and AUDIT-C Alcohol Screening Calculatorstub
- Biological Age Calculatorstub
- Blood Pressure Category Calculatorstub
- CAGE Questionnaire Calculatorstub
- Childhood Vaccination Schedule Calculatorstub
- Cold Plunge Exposure Calculatorstub
- Epworth Sleepiness Scale Calculatorstub
- GAD-7 Anxiety Screening Calculatorstub
- Insomnia Severity Index Calculatorstub
- Jet Lag Recovery Calculatorstub
- Life Expectancy Calculatorstub
- Medication Dosing Schedule Calculatorstub
- Oral Rehydration Solution Calculatorstub
- PHQ-9 Depression Screening Calculatorstub
- Pulse Pressure and Blood Pressure Metrics Calculatorstub
- Quit Smoking Savings and Health Timeline Calculatorstub
- Resting Heart Rate Percentile Calculatorstub
- Sauna Session Planner and Heat Load Calculatorstub
- Sleep Cycle and Bedtime Calculatorstub
- Smoking Cost Calculatorstub
- STOP-BANG Sleep Apnea Risk Calculatorstub
- Sun Exposure and Vitamin D Synthesis Calculatorstub
- Sweat Rate and Rehydration Calculatorstub
- Travel Vaccination and Malaria Prophylaxis Plannerstub
- UV Index Sunburn Time Calculatorstub
Fitness Analytics and Sports Medicine
- Acute-to-Chronic Workload Ratio (ACWR) Toolstub
- Exercise Heart Rate Recovery Fitness Indexerstub
- Maximum Heart Rate Tanaka Formula Adjusterstub
- METs Exercise Calorie Burnerstub
- One-Repetition Maximum (1RM) Weightlifting Estimatorstub
- Running Pace Split Time Race Performance Predictorstub
- Sweat Rate Rehydration Fluid Volume Calculatorstub
- Target Heart Rate Karvonen Formula Intensity Zonesstub
- VO2 Max Cardiovascular Endurance Step Test Estimatorstub
- Wilks Score Powerlifting Strength-to-Weight Calculatorstub
Fitness and performance
- Calories Burned Calculator (MET Compendium)stub
- Calories Burned Weightlifting Calculatorstub
- Critical Swim Speed Calculatorstub
- Cycling Power-to-Weight Ratio Calculatorstub
- Cycling Speed From Power Calculatorstub
- Daily Step Goal Calculatorstub
- DOTS Score Calculatorstub
- Functional Threshold Power Calculatorstub
- Grade Adjusted Pace Calculatorstub
- Heart Rate Zone Calculator (Karvonen)stub
- IPF GL Points Calculatorstub
- Lactate Threshold Heart Rate Zone Calculatorstub
- Marathon Finish Time and Pace Calculatorstub
- Maximum Heart Rate Calculatorstub
- Negative Split and Race Split Plannerstub
- One Rep Max Calculator (Brzycki)stub
- One Rep Max Calculator (Epley)stub
- One Rep Max Calculator (Lombardi)stub
- One Rep Max Calculator (Wathan)stub
- Percentage-Based Training Calculatorstub
- Race Time Predictor (Riegel Formula)stub
- Rowing Split and Watts Calculatorstub
- RPE to Percentage of One Rep Max Calculatorstub
- Running Pace Calculatorstub
- Sinclair Coefficient Calculatorstub
- Steps to Calories Calculatorstub
- Steps to Distance Calculatorstub
- Swimming Pace Calculatorstub
- Target Heart Rate Calculatorstub
- Training Pace Calculator (Daniels-Gilbert)stub
- Training Stress Score and Normalized Power Calculatorstub
- Training Volume Load Calculatorstub
- Treadmill Incline Equivalent Pace Calculatorstub
- Triathlon Race Time and Transition Plannerstub
- VO2 Max Calculator (Cooper 12-Minute Test)stub
- VO2 Max Calculator (Heart Rate Ratio Method)stub
- VO2 Max Calculator (Rockport Walk Test)stub
- VO2 Max Percentile and Fitness Age Calculatorstub
- Wilks Score Calculatorstub
Gastroenterology and Nutritional Support
- Body Water Volume Watson Equation Calculatorstub
- Crohn's Disease Activity Index Symptom Point Accumulatorstub
- Fecal Elastase Exocrine Pancreatic Insufficiency Indexerstub
- FIB-4 Index NAFLD Fibrosis Scalestub
- Gastric Emptying Breath Test Half-Time Lag Modelerstub
- Maddrey Discriminant Function Alcoholic Hepatitis Solverstub
- Short Bowel Syndrome Intestinal Fluid Absorption Balance Toolstub
- Stool Osmotic Gap Secretory vs Osmotic Diarrhea Toolstub
- Total Parenteral Nutrition Daily Caloric Nitrogen Matrixstub
- Truelove and Witts Severity Criteria Ulcerative Colitis Scalestub
Geriatric and Longevity Medicine
- Activities of Daily Living (ADL) Independence Score Matrixstub
- Beers Criteria Geriatric Inappropriate Medication Screenerstub
- BIMS Brief Interview for Mental Status Score Toolstub
- Charlson Comorbidity Index 10-Year Mortality Predictorstub
- Confusion Assessment Method (CAM) Delirium Diagnosis Scalestub
- FRAX Fracture Risk Assessment Osteoporosis Modelerstub
- Mini Nutritional Assessment (MNA) Elderly Profile Toolstub
- Norton Scale Pressure Ulcer Risk Profilerstub
- Palliative Performance Scale (PPS) Functional Capacity Vectorstub
- Tinetti Balance and Gait Mobility Fall Risk Predictorstub
Macros and nutrition
- Alcohol Calorie Calculatorstub
- Alcohol Units and Standard Drinks Calculatorstub
- Blood Alcohol Content Calculator (Widmark)stub
- Bulking Calorie Calculatorstub
- Caffeine Half-Life and Clearance Calculatorstub
- Calorie Deficit Calculatorstub
- Carb Cycling Calculatorstub
- Cutting Calorie Calculatorstub
- Daily Fiber Intake Calculatorstub
- Daily Water Intake Calculatorstub
- Glycemic Load Calculatorstub
- Iron Requirement Calculatorstub
- Keto Macro Calculatorstub
- Macro Calculatorstub
- Meal Timing and Intermittent Fasting Window Calculatorstub
- Micronutrient Reference Intake Calculatorstub
- Protein Intake Calculatorstub
- Refeed and Diet Break Calculatorstub
- Reverse Dieting Calculatorstub
- Sodium and Salt Intake Calculatorstub
- Vitamin D Intake Calculatorstub
Mental Health and Diagnostic Screening
- AUDIT Alcohol Use Disorders Identification Threshold Toolstub
- CAGE Substance Abuse Assessment Scoring Vectorstub
- CIWA-Ar Alcohol Withdrawal Severity Clinical Scalestub
- Epworth Sleepiness Scale Daytime Sleep Apnea Profilerstub
- GAD-7 Anxiety Severity Diagnostic Metric Matrixstub
- HAM-D Hamilton Depression Rating Clinical Questionnairestub
- MMSE Mini-Mental State Examination Cognitive Score Toolstub
- PANSS Schizophrenia Scalestub
- PHQ-9 Depression Severity Clinical Scoring Scalestub
- Y-BOCS Yale-Brown Obsessive Compulsive Diagnostic Toolstub
Oncology Staging and Prognostics
- Absolute Lymphocyte Count Cancer Prognostic Toolstub
- AJCC TNM Cancer Staging System Numeric Matrixstub
- Child-Pugh Score Liver Tumor Resection Selectorstub
- ECOG Performance Status Functional Capacity Scalestub
- FLIPI Follicular Lymphoma International Prognostic Indexstub
- IPSS-R Revised International Prognostic Scoring MDS Toolstub
- Neutropenic Fever Sepsis Risk MASCC Score Modelerstub
- Nottingham Prognostic Index Breast Cancer Survival Calculatorstub
- PSA Velocity Prostate Cancer Doubling Time Toolstub
- RECIST Solid Tumor Size Progression Response Calculatorstub
Ophthalmology and Optometry Metrics
- Anisometropia Retinal Image Size Differential Calculatorstub
- Corneal Astigmatism Vector Addition Cylinder Lens Solverstub
- Diopter-to-Focal Length Prescription Power Converterstub
- Glaucoma Progression Risk Multi-Variable Nomogram Toolstub
- Intraocular Pressure Central Corneal Thickness Adjusterstub
- Laser Eye Surgery Corneal Ablation Depth Munnerlyn Toolstub
- Snellen Visual Acuity Decimal-to-LogMAR Matrixstub
- Soft Contact Lens Base Curve Sagittal Depth Fitting Toolstub
- Strabismus Prism Diopter Hirschberg Ratio Deviation Toolstub
- Visual Field Defect Mean Deviation Progression Analyzerstub
Pediatrics and Parenting Development
- APGAR Newborn Physical Evaluation Scoring Matrixstub
- Child Developmental Milestone Age Percentile Checkerstub
- Child Target Adult Height Predictor (Khamis-Roche Method)stub
- Infant Dehydration Fluid Deficit Calculatorstub
- Infant Formula Feeding Volume Calculator by Weightstub
- Infant Growth Percentile Weight-for-Age (WHO Tables)stub
- Neonatal Hyperbilirubinemia Phototherapy Indicatorstub
- Pediatric Blood Pressure Percentile Classification Toolstub
- Pediatric Dosage by Weight Mg-to-Ml Liquid Toolstub
- Pediatric Growth Chart BMI-for-Age Percentiles (CDC)stub
Pregnancy and Womens Health
- Basal Body Temperature Spike Ovulation Locatorstub
- Breast Cancer Risk Assessment Tool (Gail Model)stub
- Conception Date Window Back-Calculatorstub
- Down Syndrome Maternal Age Trimester Risk Modelerstub
- Gestational Diabetes Glucose Tolerance Test Log Toolstub
- IVF Single Embryo Transfer Success Probability Modelerstub
- Menstrual Cycle Regularity Variance Analyzerstub
- Ovulation Window Fertility Cycle Trackerstub
- Pregnancy Due Date and Gestational Age Wheel Calculatorstub
- Pregnancy Weight Gain Target Curve Tracker (IOM Guidelines)stub
Reproductive and pediatric
- Apgar Score Calculatorstub
- Ballard Score Gestational Age Calculatorstub
- Bishop Score Calculatorstub
- Breast Milk Storage Time Calculatorstub
- Child Growth Percentile Calculator (CDC Charts)stub
- Child Growth Percentile Calculator (WHO Standards)stub
- Children's Fever Medication Dose Calculatorstub
- Conception Date Calculatorstub
- Contraction Timer and Labor Progress Calculatorstub
- Corrected Age Calculator for Preterm Infantsstub
- Due Date Calculator (Naegele's Rule)stub
- Gestational Age Calculatorstub
- hCG Doubling Time Calculatorstub
- Infant Feeding Volume Calculatorstub
- IVF Due Date Calculatorstub
- Mid-Parental Target Height Calculatorstub
- Ovulation and Fertile Window Calculatorstub
- Pediatric Appendicitis Score Calculatorstub
- Pediatric Blood Pressure Percentile Calculatorstub
- Pediatric Dehydration and Fluid Deficit Calculatorstub
- Pediatric Early Warning Score Calculatorstub
- Period Date Calculatorstub
- Pregnancy Week Calculatorstub
- Pregnancy Weight Gain Calculatorstub
- Westley Croup Score Calculatorstub
Toxicology and Environmental Health
- Acetaminophen Toxicity Rumack-Matthew Nomogram Toolstub
- Acute Radiation Syndrome Exposure Dose Impact Modelerstub
- Anaphylactic Epinephrine Dose Scaling Weight Vectorstub
- Blood Alcohol Concentration Widmark Formula Modelerstub
- Carbon Monoxide Carboxyhemoglobin Half-Life Toolstub
- Decompression Sickness Dive Table No-Fly Calculatorstub
- Heat Exhaustion Core Body Temperature Elevation Indexerstub
- Lead Poisoning Blood Level Pediatric Risk Matrixstub
- Salicylate Toxicity Done Nomogram Curve Toolstub
- Snakebite Severity Score Antivenom Dosage Estimatorstub
Vital Signs and Metabolic Lab Analytics
- Absolute Neutrophil Count Immunosuppression Monitorstub
- Anion Gap Blood Serum Metabolic Profile Calculatorstub
- Arterial Blood Gas Acid-Base Disorder Interpreterstub
- Corrected Calcium Albumin Deficit Lab Equation Toolstub
- HbA1c to Estimated Average Glucose Conversion Matrixstub
- Henderson-Hasselbalch Blood pH Buffering Toolstub
- LDL Cholesterol Friedewald Equation Estimation Toolstub
- Mean Arterial Pressure (MAP) Toolstub
- Oxygenation Index Respiratory Failure Severity Toolstub
- Serum Osmolality Lab Gap Value Calculatorstub