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38 Free Interactive Tools

Health Calculators

Personal health tracking and clinical indicators explained.

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Serum Anion Gap & Albumin Corrected Calculator (Figge-Kellum)

Calculate standard serum Anion Gap and albumin-corrected Anion Gap for metabolic acidosis diagnosis in ICU and Emergency.

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APGAR Score Newborn Calculator (1 & 5 Minutes)

Calculate newborn APGAR score at 1 and 5 minutes to rapidly evaluate physical condition after birth.

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Arterial Blood Gas Interpreter & Winter's Formula Calculator

Interpret Arterial Blood Gas (pH, PaCO₂, HCO₃⁻) and calculate expected respiratory compensation via Winter's Formula in Metabolic Acidosis.

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Blood Pressure & MAP Calculator (AHA / ACC Standards)

Calculate Mean Arterial Pressure (MAP), Pulse Pressure, and evaluate your blood pressure tier under AHA/ACC clinical guidelines.

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HbA1c to Estimated Average Glucose Calculator (eAG - ADA Standards)

Convert Glycated Hemoglobin (HbA1c %) to Estimated Average Glucose (eAG in mg/dL & mmol/L) under ADA clinical standards.

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BMI Prime Calculator (Relative Body Mass Index)

Calculate your BMI Prime ratio to evaluate the exact percentage you are above or below the upper healthy BMI limit (25.0).

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Bra Size Calculator (Band & Cup Measurement)

Find your ideal bra size (Band & Cup A, B, C, D, DD) based on underbust and bust measurements in inches or cm.

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CHA₂DS₂-VASc Score Calculator for Stroke Risk in Atrial Fibrillation

Calculate the CHA₂DS₂-VASc score to estimate annual stroke risk in non-valvular Atrial Fibrillation.

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Child Adult Height Predictor Calculator (Tanner Mid-Parental)

Predict the target adult height your child will reach based on the Tanner mid-parental genetic height formula.

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Child-Pugh Score Calculator for Liver Cirrhosis

Calculate Child-Pugh Score (Classes A, B, C) to evaluate liver cirrhosis functional severity and 1- and 2-year survival.

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Sleep Chronotype Calculator (Lark, Bear, or Owl - MEQ)

Discover your natural circadian chronotype (Morning Lark, Intermediate Bear, or Evening Owl) and optimize your peak cognitive focus window.

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Corrected Calcium for Albumin Calculator (Payne Formula)

Calculate actual Serum Calcium level corrected for hypoalbuminemia using the standard Payne equation.

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Creatinine Clearance Calculator (Cockcroft-Gault & Ideal Weight)

Calculate Creatinine Clearance (CrCl) in mL/min using the Cockcroft-Gault formula adjusted by ideal or actual weight for drug dosing.

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CURB-65 Pneumonia Severity Score Calculator

Calculate CURB-65 score to stratify Community-Acquired Pneumonia (CAP) severity and guide outpatient vs ward vs ICU management.

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Pregnancy Due Date Calculator (By LMP, Ultrasound, or Conception)

Calculate your estimated delivery due date (EDD) using ultrasound (USG), last period (LMP), or conception date.

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Estimated Glomerular Filtration Rate Calculator (eGFR CKD-EPI 2021)

Calculate Estimated Glomerular Filtration Rate (eGFR) using the official race-free 2021 CKD-EPI equation recommended by NKF and ASN.

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Fractional Excretion of Sodium & Urea Calculator (FeNa & FeUrea)

Differentiate between Prerenal Acute Kidney Injury (Azotemia) and Acute Tubular Necrosis (ATN) calculating FeNa (%) and FeUrea (%).

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Glasgow Coma Scale (GCS) Calculator

Calculate total Glasgow Coma Scale (GCS 3 to 15) using Eye, Verbal, and Motor responses for TBI and ICU patients.

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HAS-BLED Score Calculator for Major Bleeding Risk in Anticoagulation

Calculate HAS-BLED score to estimate annual major bleeding risk in patients receiving anticoagulation for Atrial Fibrillation.

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HEART Score Calculator for Emergency Chest Pain

Calculate the HEART Score to predict 6-week Major Adverse Cardiac Events (MACE) risk in emergency chest pain patients.

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Child Height Predictor & Adult Stature Calculator

Estimate predicted adult height for a boy or girl in cm/ft using the standard Mid-Parental Height method (WHO / Tanner).

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Holliday-Segar Pediatric Maintenance Fluids Calculator (4-2-1 Rule)

Calculate hourly IV infusion rate (mL/h) and 24-hour total maintenance volume for children using the Holliday-Segar 4-2-1 rule.

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MELD & MELD-Na Score Calculator (Liver Transplant Priority)

Calculate MELD and MELD-Na scores to predict 90-day waitlist mortality in end-stage liver disease and prioritize UNOS liver transplant listing.

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Ovulation & Fertile Window Calculator (Luteal Phase & Calendar)

Calculate your exact ovulation day, highest fertility window for conception, and next expected period date on the calendar.

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PaO₂/FiO₂ Ratio (PAFI / Horovitz Index) Calculator

Calculate PaO₂/FiO₂ ratio (PAFI) to assess pulmonary oxygenation impairment and classify ARDS severity per Berlin Definition.

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Pediatric BMI & Growth Percentiles Calculator (WHO & CDC)

Calculate pediatric BMI and growth percentiles for children and teens (ages 2 to 19) based on WHO and CDC standards.

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Pediatric Weight-Based Medication Dosing Calculator (mg/kg & mL)

Calculate exact pediatric liquid medication dosages in mg/kg and volume in mL per dose for Paracetamol, Ibuprofen, Amoxicillin, and common drugs.

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Pregnancy & Gestational Age Calculator (By LMP Date)

Calculate exact gestational age in weeks and days, estimated due date (EDD), and current trimester using your Last Menstrual Period (LMP) date.

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Pregnancy Conception Calculator (By Calendar Date)

Calculate probable conception date, fertile window, and actual biological fetal age based on due date or last period.

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Pregnancy Due Date & Age by Ultrasound Calculator (USG)

Calculate your estimated due date (EDD) and exact gestational age based on 1st, 2nd, or 3rd trimester ultrasound (USG) scan.

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Pregnancy Weight Gain Calculator

Calculate recommended healthy pregnancy weight gain ranges based on Institute of Medicine (IOM) guidelines.

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Corrected QTc Interval Calculator (Bazett & Fridericia)

Calculate corrected QT interval (QTc) using Bazett and Fridericia formulas to evaluate Torsades de Pointes arrhythmia risk.

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Sleep Cycle Calculator (Bedtime & Wake-Up Times)

Calculate optimal bedtime or wake-up times based on natural 90-minute REM sleep cycles.

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SOFA & qSOFA Score Calculator for Sepsis (Sepsis-3 Criteria)

Calculate total SOFA score (0 to 24) and quick SOFA (qSOFA) per Sepsis-3 criteria to evaluate organ failure severity and mortality.

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Waist-to-Height Ratio Calculator (WHtR Cardiovascular Risk)

Calculate your Waist-to-Height Ratio (WHtR) and evaluate visceral fat and cardiometabolic risk using the 50% rule.

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Waist-to-Hip Ratio Calculator (WHO WHR - Android vs Gynoid)

Calculate your Waist-to-Hip Ratio (WHR) and evaluate body fat distribution pattern (Android/Apple vs Gynoid/Pear) under WHO guidelines.

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Daily Water Intake Calculator (EFSA & NASEM Standards)

Calculate daily recommended water intake in liters and cups based on weight, sex, workout minutes, and climate.

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Wells Score Calculator for DVT and Pulmonary Embolism (PE)

Calculate Wells Score for clinical pretest probability of Pulmonary Embolism (PE) and Deep Vein Thrombosis (DVT) in Emergency.

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