Decade Calculator

Free decade calculator. Find which decade any year falls in—the 1990s, 2000s, 2020s, etc. Quick decade classification for any year.

Find which decade any year belongs to. The 1990s covers 1990-1999, the 2000s covers 2000-2009, and so on. A quick way to place any year in its cultural and historical decade context.

Common use cases

  • Pop culture and music research
  • Historical period classification
  • Nostalgic references
  • Demographic analysis
  • Trend and era identification

How to use

  1. Enter any year
  2. View which decade the year falls in
  3. See the decade's full range
  4. Understand decade naming conventions
  5. Copy the result for reference

FAQ

When does a decade start?

Colloquially, decades start at years ending in 0: the 1990s run 1990-1999. Technically, some argue for 1991-2000.

What is the 2000s decade called?

The 2000-2009 decade is often called 'the 2000s', 'the aughts', or 'the noughties'.

What about the current decade?

2020-2029 is 'the 2020s' or 'the twenties'.