How the 90/180 rule actually works
The Schengen short-stay rule lets most non-EU passport holders spend up to 90 days within any 180-day rolling window in the Schengen Area without a visa. The trick is that the 180 days is a moving window — every time you cross a Schengen border, officials look back 180 days from that date and count every day you were inside Schengen during that period.
That means there's no calendar reset. If you spent 90 days in Schengen between January and March, you can't re-enter on April 1. You have to wait until the earliest of those days falls outside the rolling 180-day window.
This calculator does the math for you. Enter every trip you've taken (or are planning), and pick a date — we'll show you how many days you've used and when you'll be free to re-enter.