Medical Calculators
Browse our collection of 20 free, evidence-based medical calculators. Each tool is built on validated clinical formulas and designed for both healthcare professionals and patients.
Cardiology
4 calculatorsBlood Pressure Calculator
Categorize readings per ACC/AHA guidelines, calculate arterial age, and get personalized insights
Target Heart Rate Zones
Calculate optimal heart rate zones for exercise using standard or Karvonen formula
ASCVD Risk Calculator
Estimate 10-year heart attack and stroke risk using ACC/AHA Pooled Cohort Equations
CHA₂DS₂-VASc Score
Calculate stroke risk in atrial fibrillation to guide anticoagulation decisions
Endocrinology
2 calculatorsNephrology
4 calculatorsCreatinine Clearance
Calculate renal function using the Cockcroft-Gault equation
eGFR Calculator (CKD-EPI)
Estimate kidney function using the 2021 race-free CKD-EPI equation with CKD staging
Sodium Correction
Correct measured sodium for hyperglycemia in DKA and HHS using Katz/Hillier formulas
Corrected Calcium
Correct serum calcium for low albumin levels to reveal true calcium status
Pharmacology
3 calculatorsMedication Half-Life
Calculate how long medications stay in your system with 50+ common drugs
Opioid Conversion
Calculate equianalgesic doses when switching between opioid medications
Steroid Conversion
Convert between corticosteroids with equivalent dosing and potency comparison
Nursing
1 calculatorWeight Management
1 calculatorWellness
1 calculatorObstetrics
1 calculatorPediatrics
1 calculatorHepatology
1 calculatorHematology
1 calculatorMedical Disclaimer: These calculators are educational tools and should not replace professional medical advice. Always consult with qualified healthcare providers for medical decisions. Results should be interpreted in the context of individual patient circumstances.