# Stroke Volume Calculator (SV) Compute SV = CO × 1000 / HR (mL/beat). Normal 60–100 mL; low in shock, hypovolemia, tachycardia; high in bradycardia and AR. Derived from Guyton & Hall, StatPearls, LITFL, Braunwald. Not medical advice. > Canonical page: https://elysiatools.com/en/tools/stroke-volume-calculator - **Category:** Health - **Keywords:** stroke volume, sv, cardiac output, heart rate, stroke volume index, svi, frank starling, preload, afterload, contractility, hemodynamics, cardiology, critical care ## Overview The Stroke Volume Calculator estimates stroke volume in mL per beat from cardiac output and heart rate using SV = CO × 1000 / HR. It also classifies the result as low, normal, or high based on the tool's reference ranges and is not medical advice. ## Inputs - **Cardiac Output CO (L/min)** (number): Cardiac output in L/min (from thermodilution, Fick, or echo). - **Heart Rate (bpm)** (number): Heart rate in beats per minute. - **Decimal Places** (number) ## When to use - Estimate stroke volume when cardiac output is recorded in L/min and heart rate is available. - Review hemodynamic measurements in clinical education, cardiology, or critical care contexts. - Check whether a calculated value falls below, within, or above the stated adult reference range of 60–100 mL per beat. ## How it works - Enter cardiac output in L/min. - Enter heart rate in beats per minute. - The calculator multiplies cardiac output by 1,000 and divides by heart rate. - The result is returned in mL/beat with a category and the selected number of decimal places. ## Use cases - Estimate stroke volume from thermodilution, Fick, or echocardiographic cardiac output measurements. - Compare stroke volume patterns associated with different heart rates during hemodynamic review. - Support physiology and cardiology teaching with a transparent, repeatable calculation. ## Frequently asked questions ### What is the stroke volume formula? Stroke volume is calculated as SV = CO × 1000 / HR, producing mL per beat. ### What inputs are required? You need cardiac output in L/min and heart rate in beats per minute. ### What is the normal stroke volume range? The tool uses 60–100 mL per beat as the normal adult range. ### Can I control the number of decimal places? Yes. You can set decimal places from 0 to 8; the default is 2. ### Is this calculator medical advice? No. It provides a calculation for reference and does not replace professional medical evaluation. ## Related tools - [A-a Gradient (Alveolar-Arterial O₂)](https://elysiatools.com/en/tools/a-a-gradient-calculator): Calculate the alveolar-arterial O₂ gradient to distinguish hypoxemia causes. PAO₂ = FiO₂×(P_atm−47) − PaCO₂/0.8; A-a = PAO₂ − PaO₂. Normal ≈ (Age+10)/4. Elevated → V/Q mismatch, shunt, diffusion impairment. Derived from StatPearls, LITFL, Cornell PICU, and Martin 1999. 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