Chess clock
Tap your side after your move.
Nothing leaves your device
This tool runs entirely in your browser. What you type, play or record here stays on your device: nothing is uploaded or saved on a server.
Example
Example: a 3+2 blitz game at a chess club, and the time left after 40 moves
Blitz night at the club, a tablet between the boards: Minutes per player 3, Increment 2. Black taps their side to start White’s clock; after each move the player taps their own side.
- White thinks 4 seconds over the first move and taps: 3:00 − 0:04 + 0:02 = 2:58.
- A quick move gains time: 1.5 seconds on the second move leaves 2:58.5, shown as 2:59 because whole seconds round up.
- A long think costs: 12.3 seconds on the third move takes White down to 2:48.2, shown as 2:49.
- Under ten seconds the clock shows tenths, like 0:09.4; at 0:00.0 the flag has fallen and that player has lost on time.
| Time control, 5 s a move | After 20 moves | After 40 moves |
|---|---|---|
| 1+0 | Flag falls on move 12 | — |
| 3+0 | 1:20 | Flag falls on move 36 |
| 3+2 | 2:00 | 1:00 |
| 5+0 | 3:20 | 1:40 |
| 10+5 | 10:00 | 10:00 |
| 15+10 | 16:40 | 18:20 |
The increment pays back part of every move: in 3+2, 40 moves at 5 seconds cost 200 seconds and return 80, so each player still has 1:00. Without it, at 3+0, the same pace runs out on move 36.
How it works
- Choose the minutes per player and the increment added after each move — 3+2 for blitz, 10+5 for rapid.
- Put the phone or tablet between the players. Black taps their side to start White’s clock.
- After each move, tap your own side to start your opponent’s clock. When a clock reaches zero, that player has lost on time.
Frequently asked questions
- What does 3+2 mean?
- Three minutes for each player, plus two seconds added after every move they make — the increment keeps a player from losing on time in a won position.
- Can I use it for other games?
- Yes — any two-player game with turns: Go, checkers, word games, card games. Set the minutes and leave the increment at 0.
- Can I use the keyboard?
- Yes: A or left Shift ends the left player’s move, L or right Shift the right player’s; Space ends the move of whoever is on the clock.
- Will the screen switch off during a game?
- While the clock runs the page asks the device to stay awake, where the browser allows it.
- Does it have delay, like US Chess clocks?
- No, only an increment (Fischer), added after each move. With a delay the first seconds of a move are simply not counted, and the clock never goes above its starting time; an increment of the same seconds is the closest setting, but quick moves let time build up.
- Why does the clock show tenths at the end?
- Under ten seconds it counts in tenths, 0:09.4, 0:09.3 and so on, so both players can see how close the flag is. Above that it shows whole seconds, rounded up, so a fresh 5-minute clock reads 5:00.
- Is anything sent anywhere?
- No. The timer runs in your browser.