The number of weeks in a semester can vary depending on the educational institution and the country. However, here are some common standards:

Typical Length of a Semester

• In the United States:
  Most colleges and universities have semesters that last about 15 to 16 weeks. This usually includes a week for final exams.

• In other countries:
  Semesters can range from 12 to 18 weeks , depending on the academic calendar.

• High school semesters:
  Often last around 18 weeks or roughly half the school year.

Summary

Institution Type| Typical Semester Length
---|---
College/University (US)| 15-16 weeks
College/University (Global)| 12-18 weeks
High School| About 18 weeks

If you need the exact length for a specific school or program, it’s best to check their academic calendar directly.