Timers & Clocks
Interval timer for HIIT, Tabata and circuits
Set work and rest, rounds and sets, press start. The screen colour and a voice tell you what is next, so you never have to look.
Warm up
03:00
Warm-up
40s
20s
01:00
03:00
03:00
33 intervals · 22:20 in total
Saved workouts (0)
No saved workouts yet. Saved ones stay in this browser.
Full interval list
- Warm-up03:00
- Work · Set 1 · Round 1/840s
- Rest · Set 1 · Round 1/820s
- Work · Set 1 · Round 2/840s
- Rest · Set 1 · Round 2/820s
- Work · Set 1 · Round 3/840s
- Rest · Set 1 · Round 3/820s
- Work · Set 1 · Round 4/840s
- Rest · Set 1 · Round 4/820s
- Work · Set 1 · Round 5/840s
- Rest · Set 1 · Round 5/820s
- Work · Set 1 · Round 6/840s
- Rest · Set 1 · Round 6/820s
- Work · Set 1 · Round 7/840s
- Rest · Set 1 · Round 7/820s
- Work · Set 1 · Round 8/840s
- Set rest · after set 101:00
- Work · Set 2 · Round 1/840s
- Rest · Set 2 · Round 1/820s
- Work · Set 2 · Round 2/840s
- Rest · Set 2 · Round 2/820s
- Work · Set 2 · Round 3/840s
- Rest · Set 2 · Round 3/820s
- Work · Set 2 · Round 4/840s
- Rest · Set 2 · Round 4/820s
- Work · Set 2 · Round 5/840s
- Rest · Set 2 · Round 5/820s
- Work · Set 2 · Round 6/840s
- Rest · Set 2 · Round 6/820s
- Work · Set 2 · Round 7/840s
- Rest · Set 2 · Round 7/820s
- Work · Set 2 · Round 8/840s
- Cool-down03:00
- Runs in your browser
- No account required
- Free to use
How it works
The workout is a list of intervals
Warm-up, then work and rest for each round, a longer rest between sets, then cool-down. The rest after the final round is dropped — nobody rests before resting. The full list is shown, with the total time.
Transitions are exact
Each interval starts at the precise moment the last one ended, measured against the clock. A dropped frame or a locked phone screen does not stretch your rest.
What it does
Presets
HIIT 40/20, Tabata 20/10 × 8, boxing rounds, circuits and EMOM — or build your own.
Voice and sound cues
Spoken "Work" and "Rest", a three-second countdown, and a tone at each change.
Next interval preview
See what is coming and how long it lasts, plus elapsed and total workout time.
Saved workouts
Save, rename, duplicate and delete your own configurations.
Practical advice
Getting a better result
- Tabata is 20 seconds hard, 10 seconds rest, eight times — four minutes that should feel long.
- Prop the phone up and press F: the colour change alone tells you work from rest.
- Voice cues need the browser to support speech; the sounds work everywhere.
Questions
Things people ask
Can I change the workout mid-session?
Pause first, then edit. Changing the workout rebuilds it from the start, so it is locked while running to avoid losing your place.
Does it work with the screen off?
The timing stays correct, but most phones stop sound from a page whose screen is off. The screen is kept awake while the workout runs, where supported.
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