What is the warning bell in boxing?

The warning bell rings 10 seconds before the end of each round, signalling to fighters that the round is nearly over. This timer replicates that with an audio warning 10 seconds before each round ends, giving you time to prepare for the rest period.

Boxing Timer

Round timer with bell sound for boxing, MMA, kickboxing and interval training. Set your rounds, round length and rest time. Warning bell 10 seconds before each round ends.

Round 1 of 3

3:00

Ready

Settings

Rounds

Round Length

3 min

Rest Time

1 min

Quick Presets

About This Tool

What it does

A configurable boxing round timer with bell sounds generated directly in your browser using the Web Audio API — no audio files needed. Warning bell 10 seconds before each round ends. Visual colour change when warning fires. Progress bar for each round and rest period.

Who it's for

Boxers, MMA fighters, Muay Thai practitioners, kickboxers, personal trainers and anyone doing interval training. Presets for boxing, MMA, professional, amateur and fitness formats. Used in gyms and home training worldwide.

Your privacy

All timer logic and audio runs in your browser. Nothing is transmitted or stored anywhere. Works offline once the page loads.

Frequently Asked Questions

How long is a boxing round?

Professional boxing rounds are 3 minutes with 1 minute rest. Amateur boxing uses 3 minutes for men and 2 minutes for women. Most boxing fitness classes use 3-minute rounds with 1 minute rest. This timer supports custom round lengths from 1 to 5 minutes.

How many rounds should I train?

Beginners start with 3-6 rounds. Intermediate fighters train 6-10 rounds. Advanced fighters may do 12-15 rounds. For conditioning, 6-8 rounds of 3 minutes is a solid session. For skill work, fewer rounds at higher intensity is more effective. Use the preset buttons above to match your training format.

What is the warning bell?

The warning bell rings 10 seconds before each round ends, signalling that the round is nearly over. This timer plays a warning bell at the 10-second mark and changes the display colour from white to yellow. The full bell rings at the end of the round and again at the end of each rest period.

Does this work for MMA training?

Yes — use the MMA preset (5 rounds × 3 minutes) or customise to match UFC rules (5 rounds for title fights, 3 rounds for regular bouts). The timer works for any combat sport or interval training format including kickboxing, Muay Thai, wrestling and grappling.

Boxing Timer

About This Tool

Frequently Asked Questions

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