The Schengen short-stay calculator, operated properly

Per the Commission's official calculator page, the tool helps you check if your short stay complies with the 90/180-day rule: visitors to the Schengen area are usually allowed a maximum of 90 days within any 180-day period, and you must count back 180 days from each day of your stay and ensure the total number does not exceed 90. The page also carries the two warnings people skip: short-stay visa holders must additionally respect the period of authorised stay printed in the visa, and holders of a residence permit or long-stay visa are not subject to the 90/180 rule at all.

The calculator itself is hosted by the Commission at ec.europa.eu/assets/home/visa-calculator.

Source: European Commission — Short-stay calculator (Migration and Home Affairs), read 8 September 2026.

The Commission's page sets out the two calculation types. Check mode calculates the length of previous and/or ongoing stays to test whether the stay complies with the 90/180-day rule on the day of the check — a compliant history returns "No overstay in the registration period", and the tool also tells you the last day on which the rule would still be satisfied. Planning mode is the forward-looking version for trips you haven't taken yet.

Practical habit: run check mode with your full entry/exit history before booking anything, and note the "last valid day" it reports — that date, not a guess, is your real ceiling.

Source: European Commission — Short-stay calculator, how to use it, read 8 September 2026.

The Commission's user manual for the calculator states the mechanics that trip people up:

• The rule means no more than 90 days in any 180-day period, which entails considering the 180-day period preceding each day of stay — the notion of "any" implies a moving 180-day reference period, looked at backwards on each day of the stay.
• The date of entry shall be considered as the first day of stay and the date of exit shall be considered as the last day — arrival at 23:50 still burns a full day.
• Periods of stay authorised under a residence permit or a long-stay visa shall not be taken into account in the calculation.

Source: European Commission — User manual for the short-stay Schengen calculator (PDF), read 8 September 2026.

The tool computes exactly what you type — it holds no record of your actual crossings. The record now exists elsewhere: the EU's Entry/Exit System registers non-EU travellers' entries and exits at the external borders, which we cover in our EES guide — so the honest use of the calculator is keeping your own count aligned with the one the border already has. And the tool answers only the Schengen rule: it says nothing about your visa's own validity window, your insurance obligations, or national rules once you switch to a long-stay permit.

Source: European Commission — Short-stay calculator, purpose and scope, read 8 September 2026.