This paper is going to analyse errors and misconceptions in an undergraduate course in Calculus. The study will be based on a group of 10 BEd. Mathematics students at Great Zimbabwe University. Data is gathered through use of two exercises on Calculus 1&2.The analysis of the results from the tests showed that a majority of the errors were due to knowledge gaps in basic algebra. We also noted that errors and misconceptions in calculus were related to learners' lack of advanced mathematical thinking since concepts in calculus are intertwined. Also in this study we highlight some common errors/ mistakes which can be done by lecturers during the teaching process.Students studying calculus often make the same mistakes and similarly lecturers teaching calculus have patterns of mistakes. This paper is derived from practical situations hence it is open to updating and can be adapted by other calculus teachers in different setups.