Students' academic achievement in courses with a high mathematical content can be affected by their levels of trait, math and test anxiety. In this study, 180 university students were assessed on these types of anxiety and the relationships between them and students' performance were evaluated. Higher levels of math anxiety were related to a low academic achievement, but a high level of test anxiety was related only to an increase in the number of errors. Moreover, although women reported higher levels of trait, math and test anxiety than their male peers, their academic achievement was similar. We conclude that math anxiety is the main emotional factor that can affect students' performance in these courses and some proposals to help highly math-anxious students are discussed.