Stroke Volume Calculator
Calculate stroke volume and stroke volume index for cardiac function assessment
Calculate Stroke Volume
Method 1: Using Cardiac Output
Normal range: 4-8 L/min
Normal range: 60-100 bpm
Body Surface Area (for Stroke Volume Index)
Method 2: Using Cardiac Index (Alternative)
Normal range: 2.5-4.0 L/(min·m²)
Use this method if you have cardiac index instead of cardiac output. Heart rate is still required.
Stroke Volume Results
Additional Calculations
Clinical Significance
Example Calculation
Healthy Adult Example
Patient: 30-year-old male, 175 cm, 70 kg
Cardiac Output: 6.0 L/min
Heart Rate: 75 bpm
Body Surface Area: 1.85 m²
Calculations
Stroke Volume = 6.0 L/min ÷ 75 bpm = 80 mL
Stroke Volume Index = 80 mL ÷ 1.85 m² = 43.2 mL/m²
Cardiac Index = 6.0 L/min ÷ 1.85 m² = 3.24 L/(min·m²)
Assessment: Normal cardiac function
Normal Values
Stroke Volume
Supporting Parameters
Clinical Applications
Anesthesiology
- • Monitoring during surgery
- • Recovery assessment
- • Fluid management
Cardiology
- • Heart failure evaluation
- • Cardiac efficiency assessment
- • Treatment monitoring
Sports Medicine
- • Athletic performance
- • Training optimization
- • Fitness assessment
Formula Reference
Stroke Volume
CO in L/min, HR in bpm, result in mL
Stroke Volume Index
SV in mL, BSA in m², result in mL/m²
Body Surface Area
Mosteller formula: H in cm, W in kg
Understanding Stroke Volume
What is Stroke Volume?
Stroke volume is the amount of blood pumped by the left ventricle of the heart with each contraction. It represents the difference between the end-diastolic volume (when the heart is full) and the end-systolic volume (when the heart has finished contracting).
Clinical Importance
- •Assesses cardiac pump function efficiency
- •Monitors heart failure progression
- •Evaluates response to treatment
- •Guides fluid management in critical care
Calculation Methods
SV = CO ÷ HR
Primary formula using cardiac output and heart rate
Factors Affecting Stroke Volume
- •Preload (venous return and filling pressure)
- •Afterload (arterial pressure and resistance)
- •Contractility (heart muscle strength)
- •Heart rate (inverse relationship)
Note: Stroke volume typically increases with exercise training and decreases with age, heart disease, and certain medications.
Medical Disclaimer
This Stroke Volume Calculator is intended for educational and informational purposes only. It should not be used as a substitute for professional medical advice, diagnosis, or treatment. Stroke volume calculations are complex medical assessments that require proper clinical context and interpretation by qualified healthcare professionals. The calculator provides estimates based on standard formulas but cannot account for individual patient factors, measurement accuracy, or clinical conditions that may affect results. Abnormal stroke volume values may indicate serious cardiac conditions requiring immediate medical attention. Always consult with a cardiologist or qualified healthcare provider for proper cardiovascular assessment, interpretation of results, and treatment decisions. This tool is not intended for emergency situations or critical care decision-making.