CalcAxis/Health/Cardiac Output
HealthUpdated · Aug 2026

Cardiac Output Calculator

Estimate cardiac output and cardiac index from oxygen content and Fick-method inputs.

~30s to useFormula and inputs shown·2 FAQs
Start with your numbers

Cardiac Output Calculator

Change the inputs that matter to your decision. Optional assumptions stay collapsed until you need them.

Fick method

Use measured VO₂ for a direct estimate or body measurements for the indirect educational model.

Blood parameters

Use measured values with their clinical units.

g/dL
%
%

Indirect patient inputs

cm
kg
years
Clinical physiology estimate
Estimated cardiac output
5.66 L/min

Normal output and normal cardiac index against broad reference ranges.

Cardiac index2.96 L/min/m²
VO₂239 mL/min
A–V O₂ difference42.2 mL/dL
Reference context only

Typical reference ranges are about 4–8 L/min for output and 2.5–4.0 L/min/m² for index. Interpretation belongs with a qualified clinician and the source measurements.

BSA used in the indirect method: 1.91 m². This educational calculation cannot diagnose heart failure, shock, or another condition.

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