HIIT Interval Timer

Run high-intensity interval workouts with work/rest rounds, beeps, and round tracking.

Work (seconds)

Rest (seconds)

Rounds

Set your intervals and press Start.

Informational only, not medical advice.

How to use

Set work seconds, rest seconds, and rounds — then run your interval workout.

What is a good HIIT interval?

A classic Tabata is 20s work / 10s rest x 8 rounds. Beginners often use 30s work / 30s rest. Adjust to your fitness.

Is HIIT safe for beginners?

Start with longer rests and get medical clearance if you have heart conditions. General guidance, not medical advice.

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