How many hours can I work in Canada as a master's student? 

As an international master's student in Canada, you are generally allowed to work on-campus or off-campus for up to 20 hours per week during regular academic sessions, and full-time during scheduled breaks, such as the winter or summer holidays. However, it's important to note that your eligibility to work may depend on your specific study permit conditions, so it's always best to consult with your designated learning institution and review your study permit to ensure that you are complying with the regulations.