How to Use Cardiac Output Calculator
Use Cardiac Output Calculator when you know heart rate and stroke volume. Enter heart rate in beats per minute and stroke volume in milliliters per beat; the calculator returns cardiac output in liters per minute.
For trend comparisons, use stroke volume values derived from the same method, such as echocardiography, hemodynamic monitoring, or a teaching example. Mixing measurement methods can make changes look larger or smaller than they really are.
Formula & Theory - Cardiac Output Calculator
The core calculation is:
Cardiac output (L/min) = heart rate (beats/min) × stroke volume (mL/beat) / 1000Cardiac output is the volume pumped by the heart each minute. The formula is direct: more beats per minute or more volume per beat raises output, while lower rate or lower stroke volume reduces it.
A normal-looking cardiac output does not always mean normal perfusion. Body size, metabolic demand, valve disease, arrhythmia, shock state, and measurement accuracy all affect interpretation.
Use Cases for Cardiac Output Calculator
Use it in physiology classes, echocardiography calculations, ICU teaching, exercise physiology, or quick checks of hemodynamic examples.
It is especially useful for showing why tachycardia may compensate for low stroke volume only up to a point.