Free Clinical Reference Tools

Respiratory Therapy Tools & Calculators

Evidence-based clinical calculators and resources designed specifically for respiratory therapists — each tool has its own dedicated page with clinical notes and how-to guidance.

7Clinical Calculators

2Site Tools

100%Free to Use

ABG Interpreter

Input arterial blood gas values and get a full acid-base interpretation with compensation status and oxygenation assessment — instantly.

ABGAcid-BaseOxygenation

IBW / PBW Calculator

Calculate Ideal Body Weight (IBW) and Predicted Body Weight (PBW) using the Devine formula, plus the safe lung-protective tidal volume range.

IBWPBWVentilation

Tidal Volume Calculator

Calculate safe tidal volumes based on PBW for ARDS, lung-protective, and standard ventilation strategies. Evidence-based targets per ARDSNet protocol.

VentilatorARDSTidal Volume

FiO₂ / O₂ Delivery Lookup

Select any oxygen delivery device to get the estimated FiO₂ and flow rate. Covers 17 devices from nasal cannula to HFNC and non-rebreather masks.

FiO2OxygenHFNC

Oxygenation Index Calculator

Calculate the Oxygenation Index from MAP, FiO₂ and PaO₂. Includes ARDS severity grading and ECMO threshold guidance.

OIARDSECMO

Spirometry Interpreter

Input FEV₁%, FVC%, and FEV₁/FVC ratio to instantly identify obstructive, restrictive, or mixed pulmonary function patterns.

SpirometryPFTCOPD

COPD Risk Assessment

Answer 8 clinically validated questions to assess COPD risk with a weighted scoring system and receive an action plan recommendation.

COPDScreeningRisk

Clinical Disclaimer

These calculators are intended for educational purposes and clinical reference only. They do not replace clinical judgment, physician orders, or institution-specific protocols.

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