How to work out how many Schengen days you have left
Your remaining Schengen days aren't 90 minus your trips — the rolling 180-day window means days expire too. Here's how to calculate days left, and the fastest way to just see the number.
Short answer: your remaining days are 90 minus the days you've spent in the Schengen Area in the last 180 days — counted against a window that moves every day. Because old days drop out of that window, your allowance quietly refills even while you're away, so "days left" isn't a fixed number — it's different every day.
Why "90 minus my trips" is wrong
If you simply add up every Schengen day this year and subtract from 90, you'll undercount your allowance. Only days inside the current rolling 180-day window count against you. A trip 200 days ago no longer matters — it has expired out of the window.
How to calculate it by hand
- Take today's date and count back 180 days — that's your window.
- Add up every distinct day you were in Schengen inside that window (arrival and departure days included).
- Subtract from 90. That's your days left today.
- To know a future date, slide the window forward — some past days will have expired, giving you more room.
It's simple per day, but you have to redo it every time you want to book something, for a window that keeps moving. That's why people use a calculator.
The fastest way: just see the number
Rather than rebuild the window each time, Flags: Schengen Calculator keeps a running count for you. It reads your travel days from your photos (offline, no GPS), walks the rolling 180-day window, and shows days used out of 90 — green, amber or red — the moment you open it. The Planning tab answers the follow-up: if I'm short, what's the earliest date a trip would fit?
A tool, not legal advice — the border officer has the final say. But the maths is exactly what it removes.