What the 90/180 rule measures
For most short stays in the Schengen Area, you may spend up to 90 days in any rolling 180-day period, unless a visa sticker, residence permit, or national rule says otherwise. The window moves with your control date: old presence drops out, new presence enters. Counting “days this calendar year” on a phone is a common way to misread the rule.
Example: 40 days ending 10 June, then 20 days in September. On a September control date the question is how many of those days fall inside the 180 days ending that day — not how many days you travelled in 2026 overall. Policy overview: Schengen 90/180 explained, short-stay starter guide.
How to enter trips and the control date
Add each short-stay entry and exit date. Use the control date as the day you are checking — today, a planned arrival, or a day during a trip. Submit to see days used, days remaining, and which trips fall fully or partly inside the lookback window. Partial trips are labelled so you can see which stay still counts.
Changing the control date changes the window. The same itinerary can show different remaining days on different control dates. Re-run the calculator whenever your plans change.
Entry and exit days
Both the day you enter and the day you leave usually count as presence. A same-day in-and-out still consumes a day in this model. Keep dates exact; rounding or omitting short hops will skew the total.
Multi-country travel shares one counter
Short stays in France, Germany, Italy, and other Schengen states generally draw from the same 90 days. Crossing an internal border does not reset the clock for typical visitors. Time spent outside the Area can push older Schengen days out of the 180-day lookback — that is the rolling window working as designed, not a per-country reset.
Who should not rely on this estimate alone
Holders of national long-stay visas or residence cards, people with bilateral exemptions, and anyone whose stamp or sticker states different conditions should follow those documents and the competent authority — not this short-stay model. Airlines may still refuse boarding based on their own document checks even when the day math looks fine.
Entry type, transit, and official sources
This calculator does not tell you whether you need a visa sticker versus visa-free entry. Use the visa checker for passport × destination labels, and the trip checker when you have a connection. Confirm rules on EU Schengen / visa policy pages and your member-state mission. Destinations and documents: Schengen hub, short-stay checklist.
If remaining days look tight
Adjust the itinerary before buying non-refundable tickets, then re-run with the new dates and a realistic control date. Incomplete trip lists and optimistic control dates are the usual reasons the remaining-days figure looks safer than it is.