Uni grading system

Im a first year undergrad. I have got 100% and 91% so far in two tests in a module. This means that my average for that module is around 94%. I know in the first year I would either pass or fail. How will I know what the pass mark is as I heard the pass mark for most unis is quite low (around 30%)?

It depends but is that the only test you will ever do for that module? How much is those two tests worth for in that module? And I don't know what the pass mark would be but I know it would be fairly low like you predict since the uni would want most of the students to pass and proceed to next year.
And well done in you tests!

A pass at most universities tend to be 40%. They are at mine.

At my old uni it was 40% - obviously it depends how much each test and module is balanced, but at the rate you're going I doubt you need to worry too much!

It's usually a bit more complicated than that. Progressing onto each subsequent year typically requires some minimum, which you'd need to find out for your specific uni. I don't know of anywhere where 30% would be considered a pass, it's typically 40% and even that's pretty low all things considered.

Each assessment in your module will be weighted. If you've achieved 100% and 91%, and those 2 assessments are weighted equally, and they're the only 2 assessments then your overall mark for that module would be 95.5%. That'd be well above the 40% pass mark. However if the 100% assessment was only weighted at 10%, then it'd only be worth 10% of your final grade, or a quarter of the marks required to pass. There's not much point to work out your average unless you've sat all the modules, or all assessments are weighted equally.

You will need to identify what the requirements to progress are, then calculate any marks using the weighted modules. This will give you an idea of what you're actually achieving. However you also shouldn't be aiming to pass, really you should be aiming to get consistent grades around the final degree classification you're aiming for.

Yeah the test which I got 100% in was only worth 8% of the module and the test which I got 91% is worth 14%. There are also 6 more tests in which 5 tests are worth 14% of the module and 1 which is worth 8%. I want to know if I'm on track to pass as there's still a long way to go. Thanks for that info it really helps.

There are 6 more tests to do in the module. Every 3 weeks we have a test so by Christmas we should have done 2 or 3 tests more. And thanks.