Different sites like Chess.com and Lichess have slightly different rules for determining what counts as “Blitz” or “Rapid” or the other categories.
Here I tried to pull them together in one place:
|Time||FIDE||US Chess (USCF)||Chess.com||Lichess|
|Classical||>= 60 minutes||>= 25 minutes|
|Regular||>= 30 minutes|
|Quick||< 30 minutes|
|Rapid||< 60 minutes||>= 10 minutes||< 25 minutes|
|Blitz||< 10 minutes||< 10 minutes||< 10 minutes||< 8 minutes|
|Bullet||< 3 minutes||< 3 minutes|
|UltraBullet||< 30 seconds|
- Fast Chess definitions on Wikipedia
- US Chess Allowable Time Controls
- Chess.com Time Controls
- Lichess Time Controls FAQ
To make this table simple, I did not include information about games with increment. The typical way that is calculated is based on a 40-move game. For instance, the estimated duration of a 5+3 game is (5 × 60) + (40 × 3) = 420 seconds.