Exercise Timer

HIIT interval timer with configurable work and rest periods. Five built-in workout presets or build your own protocol from scratch.

GET READY
10
Round / 8 Next: Work

Workout Settings

Workout Presets

How to Use the HIIT Exercise Timer

1

Set Your Protocol

Choose a preset like Tabata or HIIT, or enter custom work, rest, and round counts in the settings panel.

2

Follow the Cues

The timer uses high-contrast colors (Red for Work, Blue for Rest) and audio beeps so you never have to touch your phone during sets.

3

Track Your Rounds

Stay motivated as the round counter progresses. Focus entirely on your form while we manage the countdowns.

Benefits of Interval Training

Maximizes Caloric Burn

HIIT triggers EPOC (Excess Post-exercise Oxygen Consumption), keeping your metabolism elevated for hours after the workout ends.

Improves Cardiovascular Health

Alternating intensity levels strengthens the heart and lungs more efficiently than steady-state cardio alone.

Time-Efficient Workouts

Achieve significant fitness gains in as little as 10-20 minutes, making it perfect for busy professionals and students.

HIIT Protocol Comparison

Protocol Work Rest Rounds Total Time
Tabata 20s 10s 8 4 min
HIIT 40s 20s 10 10 min
Strength 45s 90s 5 ~11 min
Cardio 60s 30s 12 18 min
Endurance 90s 60s 6 15 min

What is the Rationale of an Exercise Timer on HIIT?

High intensity interval training relies on accuracy of timing. Work too long and you exhaust yourself before you finish all your round. Work too slowly and you do not get cardiovascular benefit because your heart rate is at the training zone or lower. The exercise timer eliminates this mental load completely, instead allowing you to focus on the form, breathing, and effort instead of worrying about the clock every now and then.

It is a free online exercise timer which will automatically switch between work and rest periods and which will announce each change with specific audio feedback and display your current round in real time. The oversized countdown clock can be seen just by looking at it even in the hardest workout when sweat and work blur your eyes.

The Science Behind HIIT

HIIT involves alternation of anaerobic work segments, i.e. periods when you make efforts to reach the verge of your maximal capacity, and short recovery periods in between when your cardiovascular system is partially restored before the next round. This produces a great metabolic effect known as excess post-exercise oxygen consumption (EPOC): your metabolism is still high hours post-training, and consumes extra calories at rest.

Between exercises in a workout, to have a time interval between them, use our Countdown Clock Timer. The 30 Minute Timer is effective to time entire blocks of the workout in the case of normal sessions.

Exercise Timer – Free Online Workout Countdown

Frequently Asked Questions

What is a HIIT timer?

HIIT timer switches between the work and rest periods automatically. You do not have to worry about the timing or the amount of rounds, the timer takes care of all the transitions with colours and tone, and you can be fully concentrated on the form and the effort.

What is Tabata timing?

The Tabata is a particular HIIT protocol, 20 seconds of maximum intensity with 10 seconds of rest, 8 times in total (4 minutes). It has cardiovascular and metabolic effects of a measurable effect even in a short duration.

Can I create a custom workout?

Yes. Insert work duration, rest duration, number of rounds, and preparation countdown in the Settings panel. Click on Apply and your custom protocol is loaded instantly.

What is the change in the timing of the signal?

The onset of work is marked by a sharp beep, and the end of work by a low tone. The card background colour also alternates, red during work, blue during rest, purple during the countdown of the preparation process.

Is the exercise timer compatible with mobile?

Yes. The timer is completely receptive and is compatible with any size of the screen. Master the art of holding your phone while on the go and use it without your hands by using only the audio cues..