Your result
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Enter your values, then click Calculate result.How this calculator helps
Check educational heart-rate times stroke-volume arithmetic and optional supplied-BSA cardiac index, without diagnosis or ranges. Heart rate and stroke volume must be supplied independently. The calculator does not infer stroke volume from a pulse rate, blood pressure or body size. Stroke volume represents blood volume per beat, and its measurement method and context matter. Entering a guessed value can produce a neat flow number without establishing actual cardiac output, so keep both input sources with the educational worksheet.
How to use it
- 1
Prepare the independently established inputs in the units shown, starting with independent inputs.
- 2
Review unit cancellation and the supported scope before submitting; example defaults demonstrate the arithmetic rather than a personal recommendation.
- 3
Click Calculate result to submit the current values. Input edits retain the previous submitted result until you calculate again.
- 4
Read the labeled output with the worked example, then check responsible interpretation before using the result in another record.
Formula and methodology
Cardiac output L/min = heart rate beats/min × stroke volume mL/beat / 1000. Optional index = cardiac output / supplied BSA m².
The calculator applies the displayed arithmetic to the values entered on this device. It does not silently load a local tax rate, currency conversion or commercial assumption.
Worked calculation example
At a supplied heart rate of 70 beats/min and independently measured stroke volume of 70 mL/beat, calculated output is 4.9 L/min. With supplied BSA of 1.8 m², the arithmetic index is about 2.7222 L/min/m². No range classification is applied.
How to interpret your result
At a supplied heart rate of 70 beats/min and independently measured stroke volume of 70 mL/beat, calculated output is 4.9 L/min. With supplied BSA of 1.8 m², the arithmetic index is about 2.7222 L/min/m². No range classification is applied. Educational supplied HR×SV identity only. No stroke-volume inference, diagnosis, normal-range label, treatment recommendation or emergency triage. Compare the labeled intermediate outputs with the input units and convention before carrying a number into another worksheet.
For different inputs or formulas, use Body Surface Area Calculator; Target Heart Rate Calculator.
Related questions this calculator covers
- cardiac output calculator
Scenario comparison
| Scenario | What it shows |
|---|---|
| No index | 70 bpm and 70 mL/beat give 4.9 L/min with BSA omitted. |
| Supplied index | adding 1.8 m² BSA gives approximately 2.7222 L/min/m². |
| Rate scaling | 140 bpm with unchanged 70 mL/beat gives 9.8 L/min as arithmetic only. |
Common mistakes to avoid
- Inferring stroke volume from pulse alone.
- Combining measurements from mismatched observation conditions.
- Reading an arithmetic output as a diagnosis or normal-range classification.
The cardiac output calculator deliberately avoids normal-range coloring, disease classification and treatment prompts. A mathematical result cannot replace examination or clinical assessment, and it does not establish exercise capacity or circulation adequacy. Use it for unit learning or checking an independently established record. Medical review of an individual's values belongs to an appropriate clinician; editorial technical review is not patient-specific validation.
Authoritative reference. Method reference reviewed on 4 October 2026. The displayed worksheet and examples are SolvePilot’s own bounded implementation. The reference does not certify an individual calculation. Review by Mohammad Qasim is editorial and technical, not patient-specific, financial, structural or equipment approval.What can affect the result?
Independent inputs
Heart rate and stroke volume must be supplied independently. The calculator does not infer stroke volume from a pulse rate, blood pressure or body size. Stroke volume represents blood volume per beat, and its measurement method and context matter. Entering a guessed value can produce a neat flow number without establishing actual cardiac output, so keep both input sources with the educational worksheet.
Unit cancellation
Multiplying beats per minute by milliliters per beat cancels the beat unit and leaves milliliters per minute. Dividing by one thousand converts that flow to liters per minute. This is a physical identity, not a prediction model. The displayed mL/min line provides a unit check and should be exactly one thousand times the L/min result before display rounding.
Optional body surface area
A positive independently supplied BSA allows arithmetic indexing to liters per minute per square meter. Zero means omit the index; it is not interpreted as a person's body surface area. A separate BSA worksheet can explain its own estimation method, but this page does not choose a formula or validate the entered BSA. Indexing does not add a clinical assessment to an uncertain flow estimate.
Measurement context
Inputs should describe the same relevant observation period. Combining heart rate from one condition with stroke volume from another can misrepresent the flow at either time. Irregular rhythms and changing conditions require appropriate clinical measurement interpretation, which this static arithmetic tool does not provide. No averaging protocol, device calibration correction or measurement uncertainty calculation is implemented.
Responsible interpretation
The cardiac output calculator deliberately avoids normal-range coloring, disease classification and treatment prompts. A mathematical result cannot replace examination or clinical assessment, and it does not establish exercise capacity or circulation adequacy. Use it for unit learning or checking an independently established record. Medical review of an individual's values belongs to an appropriate clinician; editorial technical review is not patient-specific validation.
Privacy and browser processing
Values entered on this page are processed in the current browser session. SolvePilot does not require an account and does not receive the values entered into the calculator. Refreshing or closing the page clears the working values unless the browser itself restores a previous session. Avoid entering identifying or account information because the calculation needs summary values only.
Accuracy and verification
Accuracy depends first on input quality. Confirm definitions, scales, dates and source information before entering a value. Keep an independent record of any result used for planning because this page does not create an official statement or retain a calculation history.
Limits of this estimate
Educational supplied HR×SV identity only. No stroke-volume inference, diagnosis, normal-range label, treatment recommendation or emergency triage. The entered values are not independently verified. Numerical output does not establish the suitability of its assumptions for a real situation. Calculator inputs are processed locally in the browser interface; avoid entering identifying records and retain the relevant measurement or source basis with any result you save.
Sources and review information
Frequently asked questions
Can pulse alone determine cardiac output?＋
No. Independently supplied stroke volume is also required for the identity used here.
Does the result diagnose a condition?＋
No. It provides educational arithmetic without ranges, classification or treatment advice.
What does BSA zero mean?＋
It omits the optional cardiac index; it is not a physical body-surface-area measurement.
Why divide by 1,000?＋
Heart rate times mL per beat gives mL/min, which is divided by 1,000 to express L/min.
Are input values clinically verified?＋
No. The tool cannot validate the source measurements or their suitability for an individual.