Free · Cardiovascular system calculators ❤️

Stroke Volume from Cardiac Output

Relate cardiac output, heart rate and per-beat volume, with optional body-size indexing.

Formula & worked example
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Calculator inputs

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How to use this calculator

Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Health results are educational estimates, not a diagnosis or treatment recommendation. A qualified clinician can interpret measurements in the context of your health.

Formula and method

Cardiac output 5 L/min and heart rate 100 beats/min give stroke volume 50 mL/beat.

SV = cardiac output / heart rate; BSA = 0.007184 × weight(kg)^0.425 × height(cm)^0.725.

Worked example

Enter these known values and leave the other values blank.

Cardiac output (L/min equivalent): 5 L / min
Heart rate (beats/min): 100 bpm

Stroke volume (mL/beat equivalent): 50 mL

Assumptions and limitations

Cardiac output uses L/min, heart rate beats/min and stroke volume mL/beat. Optional indexing divides by the Du Bois body surface area in m². This arithmetic requires measured output and rate; it does not estimate cardiac function from symptoms.
Use the displayed units and measurements from the same context. Editable fields support arithmetic inverses when enough independent values are supplied. Clear a preset value before solving it as an unknown.
This tool performs the stated arithmetic model. It does not establish a diagnosis, prescribe treatment or replace laboratory and clinical assessment.

Common questions

What does this calculation represent?

Cardiac output uses L/min, heart rate beats/min and stroke volume mL/beat. Optional indexing divides by the Du Bois body surface area in m². This arithmetic requires measured output and rate; it does not estimate cardiac function from symptoms.

Can I solve for a different field?

Clear the unknown field and enter enough independent values in the remaining editable controls. A relationship cannot recover a unique value when a dividing quantity is zero.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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