Background <p>Effective mental health services require high-quality psychiatric inpatient care. To evaluate care from patients’ perspective, culturally validated tools are needed that also reflect local healthcare and psychiatric nursing services. This aim of this study was to validate the Turkish version of Quality in Psychiatric Care-Inpatient scale, to support its use by psychiatric nurses in assessing the quality of inpatient care.</p> Methods <p>This methodological study included 280 psychiatric inpatients from two hospitals. The scale was translated, back-translated and reviewed by experts following Beaton et al.’s adaptation framework and the Consensus-based Standards for Selecting Health Status Measurement Instruments guidelines. Content validity, construct validity, and internal consistency were assessed.</p> Results <p>The Turkish scale comprised 22 items across four sub-dimensions, explaining 53.5% of the total variance. The alpha coefficient was 0.86, demonstrating high internal consistency. Fit indices supported the four-factor model.</p> Conclusions <p>The scale demonstrated promising psychometric properties and is suitable for psychiatric inpatient nursing practice.</p> Clinical trial number <p>Not applicable.</p>