Boxing round timer.
3-minute rounds, 1 minute in the corner. Three short beeps warn you before each bell.
Free · runs in your browser · no sign-upGet ready
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Three short beeps count down each change; a long beep starts the next phase. The page keeps your screen on. If you lock the phone or switch apps, the browser can stop the beeps. The Interval Timer app keeps beeping with the screen off.
Round lengths
| Format | Round | Rest | Rounds |
|---|---|---|---|
| Professional boxing | 3 min | 1 min | 4 to 12 |
| Amateur boxing (adults) | 3 min | 1 min | 3 |
| Shorter rounds (juniors, beginners, many gyms) | 2 min | 1 min | 3 |
| MMA (non-title) | 5 min | 1 min | 3 |
Rules differ by body and by country; check with your coach or federation. For training, most gyms use 3-minute rounds with 1 minute of rest.
A heavy-bag session
- Round 1: jab and footwork only.
- Round 2: jab–cross, and move after every combination.
- Round 3: hooks and body shots.
- Rounds 4 to 6: free rounds; push the last 30 seconds of each, after the three warning beeps.
Set 6 rounds with the “6 × 3 min” button. Use the minute of rest to breathe and drink, not to check your phone.
Why the app, if the page works?
A web page runs only while its tab is open and the screen is on. Phones pause background tabs to save battery, so a browser timer can go quiet when you lock the screen or open your music app. This page asks the browser to keep the screen on, and it plans every beep ahead on the audio clock, so it stays on time while you can see it.
The Interval Timer app runs as a proper Android service. In our test on a Galaxy S23 it played 241 of 241 beeps in a 30-minute workout with the screen off and the phone in deep sleep, and the gaps between beeps were never more than 11 ms off. See how we measured it.
Questions
How long is a boxing round?
3 minutes in professional and adult amateur boxing, with 1 minute of rest. Juniors and many gyms use 2-minute rounds.
How long is an MMA round?
5 minutes, with 1 minute of rest. Most fights have 3 rounds; title fights have 5.
Does the timer warn me before the bell?
Yes. Three short beeps count down the last 3 seconds of every round and every rest.
Can I hear it over music in the gym?
The beeps play through your phone speaker or headphones along with your music. Turn the volume up, and keep this page open on screen.