This study examined student indicators for success in entry-level college calculus. An attitude toward mathematics inventory, course performance, readiness assessment, and student interviews were used to determine characteristics and behaviors of students who succeeded in the course. In addition to student indicators, difficult topics and suggestions for improvement in the course structure were identified. While the focus of this study was on student indicators, the analyses of instructor interviews were included in order to compare their views with those of the students. The quantitative analyses showed that high school grade point average and the Calculus Readiness Assessment had positive significant correlations with course performance. The strongest positive significant correlation, however, was between attitude (Attitudes Toward Mathematics Inventory overall and confidence subscale) and course performance.