Break a multi-country Schengen itinerary into country stays, calculate nights by destination and identify gaps or ties before you rely on the route.
Important: this planner does not decide which consulate is legally competent. Main purpose, current rules and the responsible authority still matter.
What this planner helps you see
A multi-country route can look consistent on a list while still containing missing nights, overlapping country periods or a tie between destinations. The planner converts the dates into a simple country-night summary so those issues are visible.
Use the result carefully
The country with the most entered nights is useful planning information, but it is not always the complete legal test for where to apply. Verify current Schengen guidance for your actual purpose and itinerary.