Background: Calculus refers to the formation of mineral deposits that occur due to food remnants adhering to poorly cleaned dental plaque. This condition can lead to various dental problems. Calculus typically develops in hard-to-reach areas of the teeth, which are challenging to clean effectively. The research objective is to investigate the correlation between calculus index status and self-confidence among 11th-grade students at SMAN 2 Konawe Selatan. Research Method: This study employed an analytic observational method with a Cross-Sectional design. The sampling technique utilized simple random sampling, with a total sample size of 158 students. Data analysis was performed using Kendall's tau test with a significance level of a = 0.05. Research Results: The findings of this research revealed that the majority of respondents were females, accounting for 59.6% based on gender. Regarding age, the majority of respondents were 16 years old, constituting 63.9%. In terms of calculus index status, the majority fell into the moderate category, amounting to 60.1%. The Kendall's tau statistical test yielded a p-value of 0.000, which is less than 0.05. Conclusion: The study concludes that there is a correlation between calculus index status and self-confidence at SMAN 2 Konawe Selatan.