Yes, you need to learn Calculus for a career in Data Science. In your starting stages, you need to basics cleared and also fundamental knowledge in Calculus. With time and experience, you need to have a good grip on calculus to progress in data science. Basic calculus, multivariate calculus, and stochastic calculus are required to help you advance your career. If you wish to get trained and certified in Data Science, then I would recommend you to take up the Data science courses from Intellipaat. Meanwhile, also watch our YouTube video made by our experts to help you get your fundamentals correct.