Free online boxing timer
Round-and-rest interval timer with real bell sounds and a 10-second warning. Use it free in your browser, or get the Android app for ringside. No sign-up, works offline.
Prefer it in your pocket with the screen off? The free Android app keeps exact time between rounds — no browser tab, no wake-lock quirks.
Custom settings
Shortcuts: Space start / pause · R reset · F fullscreen. Settings are saved on this device.
Get the Boxing Timer app for Android
The web timer is here whenever you need it — but the app is what you want ringside. Install once and train anywhere, no browser, no tab to lose.
- Rock-solid timekeeping with the screen off and the phone in your bag
- Opening bell, end bell and the 10-second warning, loud enough for a busy gym
- Your round, rest and warm-up settings saved between sessions
- Works fully offline · free · no account · tiny download
Everything you need between the ropes — nothing you don't
The Boxing Timer does one job and does it well: it keeps your rounds honest so you can focus on the work.
Custom rounds & rest
Set round length, rest length and how many rounds — from 20-second Tabata intervals to 5-minute MMA rounds. Or tap a preset.
Real bell & 10-second warning
A clear start and end bell, plus a warning beep in the closing seconds of every round. Cuts through music and gym noise.
Fullscreen, screen-on, offline
Big fullscreen readout you can see across the gym, a wake lock so the display stays on, and it runs with no connection.
Free Android app too
Want it in your pocket with the screen off? The Boxing Timer app on Google Play is free, tiny and account-free.
Common boxing & combat-sport round formats
Tap any preset above to load it, or set your own in Custom settings.
| Format | Rounds | Round | Rest |
|---|---|---|---|
| Pro championship boxing | 12 | 3 min | 1 min |
| Pro non-title boxing | 8–10 | 3 min | 1 min |
| Amateur / most women's pro | 3 | 3 min | 1 min |
| MMA non-title | 3 | 5 min | 1 min |
| MMA title fight | 5 | 5 min | 1 min |
| Muay Thai | 5 | 3 min | 2 min |
| Tabata (HIIT) | 8 | 20 sec | 10 sec |
How to use the boxing round timer
Three steps from open to first bell.
Pick a round format
Tap a preset like Pro boxing · 12×3/1, or open Custom settings to choose your own rounds, round length and rest.
Set the warning bell
Choose how many seconds before the end of each round the warning beep sounds. Ten seconds is the boxing standard.
Start and train hands-free
Press Start (or the space bar) and go fullscreen. Rounds and rests run automatically with the bell calling each one. For pocket use with the screen off, install the Android app.
Boxing Timer — frequently asked questions
Is this boxing timer free?
Yes. The online timer is completely free, needs no account and carries no ads on the timer itself. The Android app on Google Play is free too.
How long is a boxing round?
Professional men's championship boxing is 12 rounds of 3 minutes with 1-minute rests. Many pro non-title fights are 10 rounds. Amateur bouts and most women's professional fights are commonly 3 rounds of 3 minutes, and youth or white-collar cards often use 2-minute rounds.
How much rest is there between rounds?
One minute is standard for both boxing and MMA. Some conditioning rounds cut the rest to 30 seconds to make the work harder.
What is the 10-second warning?
In boxing a wooden clapper sounds 10 seconds before the bell so fighters and corners can prepare. This timer plays a warning beep at the number of seconds you set — 10 by default.
Does the timer keep running with the screen off or in another tab?
The web timer requests a screen wake lock so your display stays on while it runs. Browsers can throttle background tabs, so for pocket use during training install the Android app, which keeps exact time with the screen off.
Does it work offline?
Once the page has loaded it runs without a connection. The Android app is fully offline after install.
Is there an iPhone or iOS version?
The web timer works on iPhone in Safari. A native iOS app isn't available yet — email [email protected] to be notified when it ships.
Can I use it for MMA, Muay Thai, HIIT or Tabata?
Yes. Use 5-minute rounds for MMA, 3-minute rounds with a 2-minute rest for Muay Thai, or 20 seconds on / 10 seconds off for Tabata. Any work-and-rest interval works.
Found a bug or have an idea? Email [email protected] — every report helps make the timer and the app better.