HIIT Interval Timer

Work/rest rounds with sound cues. Saves settings.

Phase

Ready

Round: 0 / 0

00:00

Space start/pause · R reset · N skip

Settings

Set rounds and seconds. Press Reset to apply while running.

Rounds

Work (seconds)

Rest (seconds)

How to use

Set rounds, work, and rest. Press Start. The timer will alternate work/rest until all rounds are complete. Sound cues are enabled after your first click (browser requirement).

Explanation

HIIT timer cycles between work and rest for a number of rounds/sets.

One round = Work then Rest.
Total time ≈ rounds × (work + rest) (plus any warmup/cooldown if set).
Audio cues help you switch phases without looking at the screen.