Cardiac Output (CO), Stroke Volume (SV), Cardiac Index (CI) & SVR Hemodynamics Calculator

Compute Cardiac Output (L/min), Cardiac Index (L/min/m²), and Systemic Vascular Resistance (dyn·s/cm⁵).

Cardiac Output (CO)
5.33 L/min
Cardiac Index (CI = CO ÷ BSA) 2.83 L/min/m²
Stroke Volume Index (SVI = SV ÷ BSA) 39.36 mL/m²
Systemic Vascular Resistance (SVR) 1,231.23 dyn·s/cm⁵
Inputs
⚡ Scenarios:
bpm
Heart rate in beats per minute (bpm).
mL/beat
Left ventricular Stroke Volume (SV) in mL/beat.
m²
Patient Body Surface Area (BSA) in m².
mmHg
Mean Arterial Pressure (MAP) in mmHg.
mmHg
Central Venous Pressure / Right Atrial Pressure (CVP) in mmHg.
Results & Graph
Cardiac Output (CO)
5.33 L/min
Cardiac Index (CI = CO ÷ BSA)
2.83 L/min/m²
Stroke Volume Index (SVI = SV ÷ BSA)
39.36 mL/m²
Systemic Vascular Resistance (SVR)
1,231.23 dyn·s/cm⁵

Cardiac Output (CO)

Graph 1 • Cardiac Output & Index (CI) • Domain Architecture & Live Telemetry Maps Heart Rate Bpm, Stroke Volume Ml, Body Surface Area M2 through Cardiac Output & Index (CI) Formula.
Cardiac Output & Index (CI) • Clinical & Physiological Reference Scale Low / Baseline Target / Reference Elevated / Watch High / Action Cardiac Output (CO): 5.33 L/min Cardiac Index (CI = CO ÷ B 2.83 L/min/m² Stroke Volume Index (SVI = 39.36 mL/m² Systemic Vascular Resistan 1,231.23 dyn·s/cm⁵
Graph 2 • Cardiac Output (CO) Across Heart Rate Bpm Sweep (40% → 160%) Evaluates CO_L_min = (HR × SV_mL) / 1000; CI = CO / BSA_m²; SVR = 80 × (MAP − across 7 operating points (current input highlighted).
0 L/min 4.69 L/min 9.37 L/min 2.13 28.80bpm 3.20 43.20bpm 4.26 57.60bpm 5.33 72bpm 6.39 86.40bpm 7.46 100.8bpm 8.52 115.2bpm
Graph 3 • Joint Sensitivity: Heart Rate Bpm × Stroke Volume Ml Compares Cardiac Output (CO) when Stroke Volume Ml is shifted +25% (solid) vs. −25% (dashed).
0 L/min 4.76 L/min 9.53 L/min --- Stroke Volume Ml @ 75% 4.66 -30% 5.66 -15% 6.66 +0% 7.66 +15% 8.66 +30%
Summary: At 72 bpm and 74 mL Stroke Volume, Cardiac Output is 5.33 L/min, Cardiac Index is 2.83 L/min/m² (normal 2.5–4.0), and SVR is 1231 dyn·s/cm⁵.
Summary: At 72 bpm and 74 mL Stroke Volume, Cardiac Output is 5.33 L/min, Cardiac Index is 2.83 L/min/m² (normal 2.5–4.0), and SVR is 1231 dyn·s/cm⁵.
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Formula & Mathematical Methodology: Cardiac Output & Index (CI) Formula

COLmin = (HR × SVmL) / 1000
CI = CO / BSAm²
SVR = 80 × (MAP − CVP) / CO
CO_L_min = (HR × SV_mL) / 1000; CI = CO / BSA_m²; SVR = 80 × (MAP − CVP) / CO
  • heartRateBpm: Heart Rate Bpm (bpm)
  • strokeVolumeMl: Stroke Volume Ml (mL/beat)
  • bodySurfaceAreaM2: Body Surface Area M2 (m²)
  • meanArterialPressureMmHg: Mean Arterial Pressure Mm Hg (mmHg)
  • centralVenousPressureMmHg: Central Venous Pressure Mm Hg (mmHg)

Rounding: Clinical scores round to statutory integer or decimal precision; physiological metrics round to 2 decimal places.

Worked Example: Clinical / Physiology Scenario: Cardiac Output & Index (CI)

Compute Cardiac Output (L/min), Cardiac Index (L/min/m²), and Systemic Vascular Resistance (dyn·s/cm⁵).

  1. Enter lab values, anthropometric measurements, or performance test metrics.
  2. Evaluate the reference equation: CO_L_min = (HR × SV_mL) / 1000; CI = CO / BSA_m²; SVR = 80 × (MAP − CVP) / CO.
  3. Inspect the primary classification, supporting indices, and 3 SVG charts.
Result: Computes Cardiac Output & Index (CI) via CO_L_min = (HR × SV_mL) / 1000; CI = CO / BSA_m²; SVR = 80 × (MAP − CVP) / CO.

Frequently Asked Questions

How does the Cardiac Output (CO), Stroke Volume (SV), Cardiac Index (CI) & SVR Hemodynamics Calculator compute its result?

It evaluates CO_L_min = (HR × SV_mL) / 1000; CI = CO / BSA_m²; SVR = 80 × (MAP − CVP) / CO directly in your browser and updates three custom SVG visualizations in real time.

Can I use Goal Seek to solve backwards for a target lab value or pace?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any numeric input parameter.

Are my health and biometric inputs kept private?

Yes. All calculations run 100% locally on your device with zero external transmission.

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Cardiac Output (CO), Stroke Volume (SV), Cardiac Index (CI) & SVR Hemodynamics Calculator: inputs, method, and how to read the result

Compute Cardiac Output (L/min), Cardiac Index (L/min/m²), and Systemic Vascular Resistance (dyn·s/cm⁵).

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Heart Rate Bpm: Heart rate in beats per minute (bpm).
  • Stroke Volume Ml: Left ventricular Stroke Volume (SV) in mL/beat.
  • Body Surface Area M2: Patient Body Surface Area (BSA) in m².
  • Mean Arterial Pressure Mm Hg: Mean Arterial Pressure (MAP) in mmHg.

What the calculation includes

With the default values shown, Cardiac Output (CO) is 5.33 L/min. The calculation follows Cardiac Output & Index (CI) Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Heart Rate Bpm from 72 bpm to 79.2 bpm changes Cardiac Output (CO) from 5.33 L/min to 5.86 L/min. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses peer-reviewed clinical and sports physiology formulas.
  • For educational and informational reference only; clinical scores do not replace physician judgment or laboratory reference ranges.

Scope: Global Clinical & Sports Science Consensus Check the assumptions and limitations against your situation before relying on the estimate.

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