Can you do a post-grad course in different subject to your degree?

Yes, you can absolutely do a postgraduate (post-grad) course in a different subject to your undergraduate degree. In fact, it's quite common. Many postgraduate programs welcome students from diverse academic backgrounds, and sometimes even prefer it, as it can bring a unique perspective to the course.

However, the specifics depend on the program:

* Some programs might require prerequisite knowledge or experience: A master's in engineering might require a strong foundation in math and science, regardless of your undergraduate degree. They might require bridging courses or additional qualifications to prove competency.

* The program might be more competitive: If your undergraduate degree is not directly related, you might need a stronger application to demonstrate your suitability and potential for success.

* Your prior degree might be beneficial: In some cases, a seemingly unrelated undergraduate degree can be a strength. For example, a humanities graduate might bring valuable critical thinking and analytical skills to a social science master's program.

In short, it's certainly possible and often done, but you should carefully research the specific entry requirements of the postgraduate program you are interested in.