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Cardiac Index from Cardiac Output and Body-Surface Area Calculator

CI = CO / BSA — normal 2.5-4.0 L·min⁻¹·m⁻².

Compute the cardiac index — the bedside hemodynamic measure that normalises cardiac output to body size. CI = CO (L/min) / BSA (m²). Normal range 2.5-4.0 L·min⁻¹·m⁻². CI < 2.2 defines cardiogenic shock; CI > 4.0 suggests hyperdynamic states (sepsis, anemia, hyperthyroidism).

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

L/min
m²

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

CI = CO / BSA.

In depth

Compute the cardiac index — the bedside hemodynamic measure that normalises cardiac output to body size. CI = CO (L/min) / BSA (m²). Normal range 2.5-4.0 L·min⁻¹·m⁻². CI < 2.2 defines cardiogenic shock; CI > 4.0 suggests hyperdynamic states (sepsis, anemia, hyperthyroidism).