Am I eligible to work part-time for 20 hours per week during my studies in Australia, and how does that translate to daily hours?

You are allowed to work up to 48 hours per fortnight during your studies in Australia, which averages to about 24 hours per week - not 20. This means you can typically work around 3 to 4 hours per day if you want to spread your hours evenly, but your actual daily schedule can vary as long as you don't exceed 48 hours over 14 days. During official course breaks, you can work unlimited hours. Be sure to follow these rules to keep your visa in good standing.