This travel calculator tracks compliance with the European Schengen Area's short-stay visa regulation (Regulation EU 2016/399, Article 6). Non-EU tourists, remote workers, and digital nomads from visa-exempt countries (such as the US, UK, Canada, and Australia) may stay inside the Schengen border-free zone for a maximum of 90 days within ANY rolling 180-day period. Because the 180-day window continuously rolls forward day by day, staying compliant requires tracking preceding entries and exits rather than simple calendar-year resets.

### Rolling Window Rules & Calculations - **90/180 Day Rule:** On any given calendar day of your stay, you must look backward exactly 180 days. The sum of all days spent inside the Schengen Area during that 180-day window must not exceed 90 days. - **Remaining Legal Days:** $\text{Remaining Days} = 90 - \text{Days Spent in Past 180 Days}$ - **Stay Status Verdict:** - If $\text{Planned Stay} \le \text{Remaining Days}$: Status is **Compliant**. - If $\text{Planned Stay} > \text{Remaining Days}$: Status triggers an **Overstay Warning** indicating the number of illegal days: $ ext{Overstay Days} = \text{Planned Stay} - \text{Remaining Days}$

### Worked Numeric Example Using the tool defaults: - **Days spent in Schengen during past 180 days:** 42 days - **Planned duration of upcoming trip:** 30 days

**Step-by-Step Evaluation:** 1. Maximum allowable stay remaining: $90 - 42 = 48\text{ days}$. 2. Trip duration comparison: Planned 30-day stay is less than the 48-day allowance. 3. Result: **Compliant** with an 18-day safety buffer ($48 - 30 = 18\text{ buffer days}$).

### Countries in the Schengen Area The rule applies across all 29 member states (including France, Germany, Italy, Spain, Switzerland, Greece, Portugal, Norway, and Croatia). Non-Schengen European nations like the United Kingdom, Ireland, Albania, Montenegro, and Cyprus operate separate border limits and do not count toward your Schengen 90-day tally.

### Privacy and Client-Side Execution All day counts and itinerary evaluations run locally inside your browser. No travel history, passport details, or date inputs are transmitted across the network.