Respiratory Calculator Hub

Welcome to the Respiratory Calculator hub – your one-stop resource for essential tools that support respiratory assessment and clinical decision-making. Designed for medical students, physicians, respiratory therapists, and ICU staff, this collection provides reliable and easy-to-use calculators to enhance patient care.

Available Calculators

1. Arterial Blood Gas (ABG) Analyzer

Interpret pH, PaCO₂, PaO₂, HCO₃⁻, and oxygenation status instantly. Helps identify respiratory vs metabolic imbalances.

2. Alveolar-arterial (A-a) Gradient Calculator

Estimate the efficiency of gas exchange across the alveolar membrane.

3. PaO₂/FiO₂ (P/F) Ratio

Assess oxygenation in ARDS diagnosis and ICU management.

4. Minute Ventilation (VE) Calculator

Calculate minute ventilation using tidal volume and respiratory rate.

5. Tidal Volume (VT) Calculator

Estimate ideal tidal volume based on predicted body weight (PBW) for lung-protective ventilation.

6. Ventilator Settings Estimator

Guide initial ventilator parameters for volume or pressure modes.

7. Oxygen Delivery (DO₂) Calculator

Compute oxygen delivery based on cardiac output and hemoglobin.

8. Dead Space (VD/VT) Ratio

Evaluate the portion of tidal volume not involved in gas exchange.

9. Respiratory Rate-Oxygenation (ROX) Index

Predict the success of high-flow nasal oxygen (HFNO) therapy in hypoxemic respiratory failure.

10. PSI (Pneumonia Severity Index) Calculator

The Pneumonia Severity Index (PSI) calculator helps assess the severity and mortality risk of community-acquired pneumonia (CAP) to guide decisions on hospitalization and treatment.

Why Use Our Respiratory Calculators?

  • ✔ Evidence-based formulas
  • ✔ Instant, real-time results
  • ✔ Mobile & desktop optimized
  • ✔ No login required
  • ✔ Continuously updated with latest guidelines

Clinical Relevance

Our calculators are based on the latest research and clinical guidelines from trusted sources such as:

ARDSnet protocol

American Thoracic Society (ATS)

European Respiratory Society (ERS)

Surviving Sepsis Campaign

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