Perioperative anxiety and distress are common in pediatric patients undergoing general anesthesia and increase the risk for immediate and long‐term postoperative complications. This concise review outlines key research and clinically‐relevant scales that measure pediatric perioperative affect. Strengths and weaknesses of each scale are highlighted. A literature review identified 11 articles with the following inclusion criteria: patients less than or equal to 18 years, perioperative anxiety or distress, and original studies with reliability or validity data. Although robust research‐based assessment tools to measure anxiety have been developed, such as the Modified Yale Preoperative Anxiety Scale, they are too complex and time‐consuming to complete by clinicians also providing anesthesia. Clinically‐based anxiety measurement scales tend to be easier to use, however they require further testing before widespread standard utilization. The HRAD ± scale (Happy, Relaxed, Anxious, Distressed, with a yes/no answer to cooperation) may be a promising observational anxiety scale that is efficient and includes an assessment of compliance. Further studies are needed to refine a clinically‐relevant anxiety assessment tool and appraise interventions that reduce perioperative distress.