Century Calculator

Free century calculator. Find which century any year falls in—1st, 20th, 21st, etc. Understand historical and future century classifications.

Determine which century any year belongs to. Years 1-100 are the 1st century, 101-200 the 2nd, and so on. The year 2000 is the last year of the 20th century, while 2001 began the 21st.

Common use cases

  • Historical research and dating
  • Understanding century terminology
  • Educational purposes
  • Genealogy research
  • Literary and historical context

How to use

  1. Enter any year (positive or negative for BCE)
  2. View which century the year falls in
  3. See the century range (e.g., 1901-2000 for 20th century)
  4. Understand the ordinal naming convention
  5. Copy the result for historical research

FAQ

Is 2000 in the 20th or 21st century?

2000 is the final year of the 20th century. The 21st century began January 1, 2001.

How are centuries numbered?

The 1st century covers years 1-100, the 2nd century 101-200, and so on. There is no year 0.

What about BCE years?

BCE centuries work similarly: 100-1 BCE is the 1st century BCE.