A visitor visa (B-1/B-2) typically allows you to stay in the U.S. for up to six months per entry, though the exact length of stay is determined by the Customs and Border Protection (CBP) officer at the port of entry. The date by which you must leave will be recorded on your I-94 record.

The U.S. visitor visa is generally issued for multiple years, sometimes allowing multiple entries, but each stay is temporary. Your length of stay is set by the I-94 record, usually up to six months. If you need more time, you may file Form I-539 to request an extension before your authorized stay expires, but approval depends on demonstrating valid reasons.

Yes, it is possible to change status from a visitor visa to a student visa inside the U.S., but you must apply with USCIS before your authorized stay ends and be accepted by a SEVP-certified school.