CLINICAL DECISION SUPPORT TOOLS
Medical Calculators for Point-of-Care Decisions
Fast, peer-reviewed clinical calculators, scoring systems, and dosing algorithms built for clinicians, intensivists, and medical residents.
A-a Gradient Calculator
Calculate alveolar-arterial oxygen gradient from ABG to distinguish intrapulmonary from extrapulmonary hypoxaemia.
ABCD2 Score | TIA Stroke Risk
Stratify 2-day and 7-day stroke risk after transient ischaemic attack. Identifies high-risk TIA patients needing urgent admission.
ABG Interpreter: Arterial Blood Gas Calculator
Complete acid-base evaluation: primary disorder, expected compensation, anion gap, and oxygenation status.
Albumin-Corrected Anion Gap
Unmask high anion gap metabolic acidosis obscured by hypoalbuminaemia. Includes delta-delta ratio for mixed disorders.
Anion Gap Calculator with Delta Ratio
Evaluate metabolic acidosis, calculate delta gap for mixed acid-base derangements, and assess Winter's respiratory compensation.
Anti-Rabies Serum Dose Calculator (ERIG & HRIG)
Calculate ERIG (40 IU/kg) and HRIG (20 IU/kg) volumes, vial requirements, and local wound infiltration guidance.
APACHE II Score Calculator
Estimate ICU mortality risk using 12 acute physiological variables, age points, and chronic health evaluation.
APGAR Score Calculator
Rapid newborn assessment at 1, 5, and 10 minutes post-delivery across Appearance, Pulse, Grimace, Activity, and Respiration.
ARV Dose Calculator India (Rabies Vaccine & RIG)
Calculate Category I–III rabies post-exposure prophylaxis, Essen intramuscular and updated intradermal schedules.
ASCVD 10-Year Cardiovascular Risk
Estimate 10-year risk of primary hard ASCVD events using AHA/ACC pooled cohort equations and statin eligibility criteria.
Beta hCG Doubling Time Calculator
Assess early pregnancy viability, ectopic pregnancy risk, or spontaneous miscarriage with serial hCG kinetics.
Biomedical Waste Management India (Rules 2016)
Colour-coded segregation guide for yellow, red, white, blue, and black hospital waste streams per CPCB standards.
BISAP Score for Acute Pancreatitis
Stratify early 24-hour in-hospital mortality, organ failure, and ICU escalation risk in acute pancreatitis.
BMI Calculator India (Asian Cutoffs)
Body Mass Index assessment with revised Asian Indian cutoffs (Overweight ≥23, Obese ≥25 kg/m²).
Breastfeeding Calorie & Macro Calculator
ICMR 2020 RDA lactation nutrition targets, daily energy requirements, and micronutrient allowances for nursing mothers.
Body Surface Area (BSA) Calculator
Calculate BSA using Mosteller, DuBois, Boyd, and Haycock formulas for precise chemotherapy and cardiac index dosing.
Parkland Burn Fluid Resuscitation & Rule of Nines
Determine 24-hour crystalloid resuscitation needs using the Parkland formula and Lund-Browder / Rule of Nines TBSA mapping.
CBC Report Interpreter
Analyze complete blood count parameters: Hb, RBC, WBC differentials, platelet count, MCV, MCH, and RDW indices.
CHA₂DS₂-VASc Score Calculator
Annual thromboembolic stroke risk assessment and oral anticoagulation recommendations in non-valvular atrial fibrillation.
Child-Pugh Score for Cirrhosis Staging
Classify chronic liver disease severity (Class A, B, C) with 1-year/2-year survival rates and perioperative decompensation risk.
Conception Date Calculator
Estimate probable biological conception date and fertile window based on LMP, ultrasound biometry, or known due date.
Corrected Calcium for Hypoalbuminaemia
Calculate albumin-adjusted serum total calcium to identify masked hypercalcaemia or pseudohypocalcaemia.
Creatinine Clearance (Cockcroft-Gault)
Estimate renal drug clearance and guide dosage titrations for antibiotics, DOACs, and renally cleared therapeutics.
CURB-65 Score for Community-Acquired Pneumonia
Assess 30-day pneumonia mortality and determine outpatient vs. inpatient ward vs. ICU admission pathways.
Drug Dose Calculator India (mg/kg)
Rapid weight-based paediatric and adult dose calculations for antipyretics, common antimicrobials, and emergency infusions.
Pregnancy Due Date & Gestational Age (EDD/POG)
Calculate Expected Date of Delivery via Naegele's rule, first-trimester CRL ultrasound biometry, or IVF embryo transfer.
Fetal Weight Comparison (6 EFW Formulas)
Simultaneously evaluate estimated fetal weight across Hadlock 1–4, Shepard, and INTERGROWTH-21st equations.
eGFR Calculator (CKD-EPI 2021 & MDRD)
Glomerular filtration rate calculation without race modifier. Includes KDIGO chronic kidney disease staging G1–G5.
Edinburgh Postnatal Depression Scale (EPDS)
Validated 10-question screening instrument for perinatal and postpartum maternal depressive disorders.
Fractional Excretion of Sodium (FENa)
Differentiate prerenal azotaemia from acute tubular necrosis (ATN). Includes clinical caveats for loop diuretic therapy.
Fetal Doppler Indices (UA S/D, PI, RI, CPR & MCA-PSV)
Analyze umbilical artery resistance, MCA peak systolic velocity for fetal anaemia, and Cerebroplacental Ratio (CPR).
Fetal Growth Percentile Calculator
Track estimated fetal biometric development week-by-week against WHO and Hadlock intrauterine fetal growth curves.
FIB-4 Index for Liver Fibrosis
Non-invasive fibrosis screening score in NAFLD/MASLD, Hepatitis B, and Hepatitis C using Age, AST, ALT, and Platelets.
Framingham 10-Year CHD Risk Score
Predict 10-year risk of developing coronary heart disease events to guide primary prevention and lipid-lowering therapy.
Glasgow Coma Scale (Adult & Paediatric GCS)
Quantify impaired consciousness across Eye, Verbal, and Motor axes with intubation (T) modifiers and 48-hour trauma grading.
Gestational Age Calculator
Compute exact weeks and days of pregnancy, current trimester milestone timeline, and anticipated fetal milestones.
GRACE Score for Acute Coronary Syndrome
Estimate in-hospital and 6-month post-ACS mortality to determine indications for early invasive coronary angiography.
WHO & IAP Child Growth Charts (Z-Scores)
Evaluate weight-for-age, height-for-age, and BMI-for-age percentiles and Z-scores for Indian boys and girls (0–18 years).
Growth Velocity Calculator
Assess annualized height and weight velocity against WHO growth monitoring standards to identify failure to thrive.
Hadlock EFW Sonographic Calculator
Calculate estimated fetal weight from BPD, HC, AC, and FL measurements with intrauterine growth percentiles (SGA/AGA/LGA).
HAS-BLED Bleeding Risk Score
Identify modifiable major bleeding risk factors in patients undergoing systemic anticoagulation for atrial fibrillation.
HbA1c to Estimated Average Glucose (eAG) Converter
Convert NGSP HbA1c percentages to IFCC mmol/mol and estimated average daily blood glucose in mg/dL and mmol/L.
Height Velocity Calculator (cm/year)
Compute annualized linear statural growth velocity and screen for growth hormone deficiency or pubertal delay.
Holliday-Segar Maintenance Fluid (4-2-1 Rule)
Calculate baseline daily and hourly maintenance IV fluid requirements and maintenance electrolyte additions for children.
Hunt & Hess Scale for Subarachnoid Haemorrhage
Grade clinical severity and predict surgical perioperative mortality following aneurysmal subarachnoid haemorrhage.
Billewicz Score & Hypothyroidism Guidance
Clinical index for overt thyroid dysfunction, TSH interpretation algorithms, and weight-based levothyroxine initiation.
Ideal Body Weight (IBW) & Adjusted Weight
Calculate IBW using Devine, Robinson, and Hamwi equations for mechanical ventilator tidal volume and aminoglycoside dosing.
Iron Deficit Calculator (Ganzoni Equation)
Calculate elemental iron deficit for parenteral IV iron carboxymaltose, iron sucrose, and iron dextran therapy.
IV Drip Rate Calculator (Drops/min & mL/hr)
Calculate drops per minute (gtt/min) for microdrip (60 gtt/mL) and standard macrodrip infusion tubing sets.
Kt/V & URR Haemodialysis Adequacy
Compute Daugirdas single-pool spKt/V and urea reduction ratio (URR) to evaluate adequacy of renal replacement therapy.
Clinical Laboratory Unit Converter (SI to Conventional)
Convert between mg/dL and mmol/L or standard units across 25+ blood biochemistries, electrolytes, and renal analytes.
LDL Cholesterol Calculator (Friedewald Equation)
Calculate serum LDL-C from lipid profiles and evaluate clinical validity when hypertriglyceridaemia is present.
Mean Arterial Pressure (MAP) Calculator
Determine organ perfusion pressure from systolic and diastolic blood pressure readings with critical shock limits.
MELD & MELD-Na Score Calculator
Predict 90-day waitlist mortality in end-stage liver disease using Bilirubin, INR, Serum Creatinine, and Sodium.
Mentzer Index (Beta Thalassaemia vs Iron Deficiency)
Differentiate microcytic anaemia etiologies using the MCV/RBC ratio to identify suspected thalassaemia trait.
Developmental Milestones Checklist (IAP)
Track motor, cognitive, speech, and social developmental progress from newborn to 18 years with red flag developmental indicators.
NAFLD Fibrosis Score (NFS)
Identify advanced liver fibrosis (F3–F4) in metabolic dysfunction-associated steatotic liver disease (MASLD).
Neonatal Jaundice Phototherapy Thresholds
Assess hour-specific bilirubin thresholds for intensive phototherapy and exchange transfusion per AAP 2022 guidelines.
NEWS2 National Early Warning Score
Standardized physiological bedside scoring system to identify deteriorating adult patients in acute inpatient wards.
NIH Stroke Scale (NIHSS) Calculator
Quantify baseline acute ischaemic stroke neurological impairment across 11 parameters to guide emergency thrombolysis.
OB Wheel Pregnancy & Gestational Age Calculator
Comprehensive obstetrical wheel for LMP, conception, IVF transfer dates, trimester transitions, and scan adjustments.
WHO ORS Rehydration & Zinc Dose Calculator
Calculate Plan A, Plan B, and Plan C fluid resuscitation targets for acute dehydrating diarrhoea in children and adults.
Ovulation & Fertile Window Calculator
Predict probable ovulation timing, fertile windows, and peak luteinizing hormone surge based on menstrual cycle duration.
Paracetamol Dose Calculator India (15 mg/kg)
Calculate weight-based paracetamol elixir, drops, and syrup volumes for standard 125mg/5mL and 250mg/5mL preparations.
Pediatric Asthma Action Plan (Green/Yellow/Red Zones)
Stratify child asthma severity, provide bronchodilator dosing instructions, and identify emergency hospital referral signs.
Pediatric Dehydration Assessment (WHO / DHAKA)
Classify dehydration status (No, Some, Severe) and generate rehydration fluid volumes using WHO diarrhoeal protocols.
Paediatric Emergency Weight Estimation
Estimate child weight from age using APLS, Luscombe, and Nelson formulas for emergency resuscitation and defibrillation.
PERC Rule for Pulmonary Embolism
Rule out acute pulmonary embolism without D-dimer testing or CT pulmonary angiography in low pre-test probability patients.
PHQ-9 Depression & GAD-7 Anxiety Screener
Scored clinical screening questionnaires for major depressive disorder and generalized anxiety disorder with symptom severity.
Pregnancy Pre-Gravid BMI Calculator
Determine baseline pre-pregnancy weight category and calculate maternal metabolic health risk stratifications.
Pregnancy Weight Gain Tracker (IOM 2009)
Track recommended gestational weight gain targets week-by-week for singleton and twin pregnancies based on baseline BMI.
Prostate Volume & PSA Density Calculator
Calculate prostate volume via ellipsoid formula from ultrasound/MRI and determine PSA density to guide biopsy decisions.
Pneumonia Severity Index (PSI / PORT Score)
Stratify 30-day mortality in community-acquired pneumonia to determine outpatient vs. inpatient vs. intensive care management.
qSOFA (quick SOFA) Sepsis Bedside Screening
Rapid bedside screen for sepsis outside the ICU based on respiratory rate, altered mentation, and systolic blood pressure.
QTc (Corrected QT Interval) Calculator
Calculate rate-corrected QT interval via Bazett, Fridericia, Framingham, and Hodges formulas to assess ventricular arrhythmia risk.
Richmond Agitation-Sedation Scale (RASS)
Titrate sedative infusions and assess agitation and sedation depth in mechanically ventilated intensive care patients.
Revised Cardiac Risk Index (Lee's RCRI)
Estimate perioperative major adverse cardiac event (MACE) risk in adult patients undergoing elective non-cardiac surgery.
Reverse Due Date & Conception Calculator
Back-calculate estimated date of conception and probable menstrual cycle timeline from a known birth date or EDD.
Serum Osmolality & Osmol Gap Calculator
Calculate serum osmolality and evaluate the osmolar gap to screen for toxic alcohol ingestions (methanol, ethylene glycol).
Shock Index & Age-Adjusted Shock Index
Identify occult haemodynamic collapse and predict massive blood transfusion requirements in trauma and obstetrical haemorrhage.
SIRS (Systemic Inflammatory Response) Criteria
Bedside evaluation for systemic inflammation and clinical screening for sepsis according to consensus criteria.
Sodium Correction for Hyperglycaemia
Calculate true corrected serum sodium in severe diabetic ketoacidosis (DKA) or hyperosmolar hyperglycaemic states (HHS).
Sequential Organ Failure Assessment (SOFA)
Assess multiorgan dysfunction across respiration, coagulation, liver, cardiovascular, CNS, and renal systems in ICU sepsis.
Spirometry Predicted Values India (Jindal Equations)
Calculate predicted FEV1, FVC, and FEV1/FVC ratios using validated Indian reference equations for ventilatory defects.
Systemic Corticosteroid Dose Equivalence
Convert anti-inflammatory and mineralocorticoid potencies between hydrocortisone, prednisolone, dexamethasone, and deflazacort.
NACO STI/RTI Syndromic Management Guide
Standard Indian syndromic management regimens for urethral discharge, genital ulcers, vaginal discharge, and pelvic infections.
TSH & Thyroid Panel Interpreter
Diagnostic classification of overt/subclinical hypothyroidism, thyrotoxicosis, and non-thyroidal illness with levothyroxine titration.
UIP Universal Immunisation Schedule India (2026)
Generate birth-to-adolescent vaccination calendars and catch-up schedules for missed doses based on National Immunisation Schedule.
Urine Protein-to-Creatinine Ratio (UPCR)
Quantify 24-hour proteinuria equivalents from random spot urine samples with KDIGO CKD risk classifications.
Wells Score for DVT & Pulmonary Embolism
Pre-test clinical probability stratification for deep vein thrombosis and pulmonary embolism with guideline-directed D-dimer pathways.