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Stopwatch for HIIT and Interval Workouts

Time your high-intensity intervals, rest periods, and circuit workouts with precision and lap recording.

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Keyboard: Space start/stop · L lap · R reset

Fitness tips

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For Tabata workouts (20s work / 10s rest × 8 rounds), use the lap button after each work or rest phase to track interval consistency.

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The fastest/slowest lap highlighting shows whether your intensity is dropping over rounds — useful for tracking endurance improvement over weeks.

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Use the keyboard shortcut Space to start/stop without taking your hand off the mat. Great for floor exercises where you can't easily touch your phone.

📊

Copy your laps after a workout to log to a fitness journal or spreadsheet. The tab-separated format pastes cleanly into Google Sheets or Excel.

Sådan fungerer det

1
Indtast
Enter your data into the tool above. Everything stays local to your browser.
2
Behandl
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
Hent
Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Hvorfor bruge vores?

Helt gratis — ingen skjulte omkostninger, nogensinde
Ingen konto, e-mail eller login krævet
Filer forlader aldrig din enhed
Ingen filstørrelsesbegrænsninger overhovedet
Ingen vandmærker på noget output

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