The 90/180 rule: in any rolling 180-day period, you can spend a maximum of 90 days in the Schengen Area. Add every trip below - we'll compute your remaining days, today.
The Schengen Area treats stays as a rolling window. On any given day, look back 180 days. The total days you were physically inside the Schengen Area during that window cannot exceed 90.
Day of entry and day of exit both count as full days. Time spent in international transit (airside, without crossing immigration) does not count, but any stay where you cross passport control counts — even a few hours. A long-stay D-visa or residence permit exempts you from 90/180 only in the issuing country; time spent in other Schengen states still counts toward the cap.