The overview of visa requirements/exemptions for entry into Switzerland shall be checked on the website of the State Secretariat for Migration.
A category C visa is issued for stays in the Schengen area of up to 90 days in any 180-day period. Unless otherwise noted, Schengen visas are generally valid for all member states of the Schengen Agreement, including Switzerland. Occasionally, the validity of a category C visa is limited to certain countries and is noted on the visa.. Schengen visas may be single-, double- or multiple-entry and allow the holder to spend no more than 90 days in Switzerland and other Schengen countries within a 180-day period (calculated from the holder’s first arrival in the Schengen area). Visas with a shorter duration of stay may also be issued for third-country nationals requiring a visa. The duration of the stay is noted on the visa in these cases.
A short-stay Schengen visa calculator is available to calculate whether you fulfil the general 90 days/180-day rule or not, and to estimate for the maximum length of stays in the future from the intended date of entry on the basis of previous entry and exit dates.