Cardiac Output Calculator
Calculate cardiac output (CO) using heart rate (HR) and stroke volume (SV). Cardiac output is the volume of blood the heart pumps per minute, a key indicator of cardiac function.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Cardiac Output Calculator
- Enter Heart Rate (bpm): Type the patient’s heart rate in beats per minute (e.g., 70). Must be 0 or greater.
- Enter Stroke Volume (mL/beat): Type the stroke volume in milliliters per beat (e.g., 70). Must be 0 or greater.
- Click “Calculate Cardiac Output”: The calculator multiplies HR × SV and divides by 1000 to get cardiac output in liters per minute (L/min).
- Read the Result: The output appears in green with the formula: CO = HR × SV / 1000. Invalid inputs show an error with highlighted fields.
All values must be non-negative numbers. No unit conversion is needed—use bpm and mL/beat as shown.
Previous Results
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Frequently Asked Questions
Cardiac output (CO) is the volume of blood the heart pumps per minute. It is calculated as heart rate (HR) multiplied by stroke volume (SV).
Normal cardiac output at rest ranges from 4 to 8 L/min, but it varies based on body size, age, and fitness level.
CO = HR × SV. For example, if HR is 70 bpm and SV is 70 mL/beat, CO = 70 × 70 / 1000 = 4.9 L/min.
