With a Slovenia tourist visa, you can stay for up to 90 days within a 180-day period. This means you can travel within Slovenia and other Schengen countries for a total of 90 days in six months. The 180-day period is counted from your first day of entry. You can use these 90 days continuously or in multiple visits, depending on your visa type. It is important to follow this rule, as staying longer than allowed can lead to fines or future visa problems.