Add each stay (entry and exit date, both days count as days in the country). The tool counts how many days you used in the 180 days ending on the check date.
New to the rule? Read how the Schengen 90/180 rule is counted.
Stays: 1 Jan–30 Jan 2026 (30 days) and 1 Mar–15 Apr 2026 (46 days). On 20 Apr 2026 the window is 23 Oct 2025 – 20 Apr 2026, so 76 days are used and 14 remain: staying continuously from 20 Apr, the last allowed day is 3 May 2026. Press “Load example” to see it, with a calendar of the window.
The European Commission publishes a short-stay calculator (page checked 24 Oct 2026). It counts back 180 days from each day of stay and offers a check mode and a planning mode. Do not enter periods on a residence permit or a long-stay (D) visa: they are not subject to the 90/180 rule.
For any date, the window is that date and the 179 days before it. Every day inside a stay that falls in the window counts, including the entry and exit days. The "must leave by" date is the last day on which the count stays within the limit if you remain continuously from the check date.
This is a date-arithmetic aid, not legal advice. Whether the 90/180 rule applies to you, and how, depends on your nationality, visa or permit type and the country. Always confirm with the official immigration authority (for Turkey: e-ikamet / turkiye.gov.tr / the Presidency of Migration Management). All calculation happens in your browser; no data is sent anywhere.