Ejection Fraction Calculator
Calculate Left Ventricular Ejection Fraction (LVEF) based on stroke volume and end-diastolic volume.
Input Parameters
Enter details for calculation.
Ejection Fraction
Expert Tip
Normal EF is 50-70%. An EF < 40% indicates systolic heart failure (Heart Failure with Reduced Ejection Fraction - HFrEF).
Calculation Methodology & Details
Formula
Measures the percentage of blood leaving the left ventricle each time it contracts.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How Ejection Fraction is Calculated
Follow these steps to use this calculator:
Input End Volumes
Enter end-diastolic and end-systolic ventricular volumes.
Read EF Percentage
Evaluate ventricular function stage.
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ℹ️ About this Calculation
This clinical cardiovascular calculator provides precise hemodynamics assessment, ischemic heart disease risk stratification, electrophysiology calculations, and vascular disease evaluation based on ACC/AHA guidelines.
Variable Glossary
Vascular & ECG Data
Systolic/diastolic blood pressure, pulse rate, ECG intervals (QT/RR), or ankle-brachial Doppler pressures.
Hemodynamic Scores
Mean arterial pressure (MAP), corrected QTc interval, ASCVD 10-year risk percentage, or ejection fraction.
How to Calculate Step-by-Step
Step 1
Input hemodynamic vitals, lab values, or ECG measurement parameters.
Step 2
Select patient demographics, clinical comorbidities, or exercise test responses.
Step 3
Review calculated risk scores, hemodynamic parameters, and clinical classification recommendations.