Timer tools · Workout & rounds
Boxing Round Timer
Stay with the round. We’ll watch the clock.
Ready when you are
Reset this session and its round marks?
Your session at a glance
See every step
Set your rhythm
Preview updates as you edit. Reset an active session before changing its plan.
Make it sound like you
Twelve synthesized sounds. Test your volume before starting. Keep this page open; sleeping devices and background tabs can prevent timely alerts.
Screen awake is off.
Settings and sessions are saved on this device.
How to use the boxing round timer
Choose the number and length of rounds, then set rest between rounds. A preparation countdown gives you time to get into position. Set a warning before the end of each active round, or set it to zero to turn it off.
The default is three 3-minute rounds with 1-minute rests between them. No extra rest is added after the final round. The selected transition tone marks round changes; the warning cue is shorter so you can distinguish it.
Can I use two-minute rounds or a silent boxing timer?
Yes. Change round seconds to 120 for two minutes, or any supported length. Turn off sound for a visual-only display. The current round, next phase, and remaining time stay visible.
What happens if I refresh or switch tabs?
Running timers are recovered from saved timestamps after a refresh. They catch up to the elapsed schedule without replaying a stream of missed sounds. In manual-transition mode, the next step waits for you. Keep the page open and test your sound: background throttling, sleeping devices, or closing the browser can delay or prevent an alert. Changing the device clock can affect recovery after a reload.
Do I need an account?
No. Settings and the current session stay in this browser. They are not synced to an account. Clearing TimeCubby data removes them. Sounds are generated locally, with no audio files downloaded or uploaded.