ROX Index Calculator Online

The ROX index = (SpO2/FiO2) / respiratory rate. It predicts the risk of high-flow nasal cannula (HFNC) failure in hypoxemic respiratory failure, with cut-offs validated at 2, 6 and 12 hours of treatment (Roca et al., Am J Respir Crit Care Med. 2019).

Medical notice: Reference and organization tool for healthcare professionals. This is NOT a medical device, does NOT provide a diagnosis, and does NOT replace clinical judgment or current institutional guidelines. The professional using this calculator is responsible for validating every result against current evidence and regulations before applying it to a real patient. Free tool by CESCAC Productos y Servicios S.A.S. (RUC 0993389404001, Ecuador).

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