Fitness
Interval Timer
Run intervals by setting the block and calling the switches, or chain short countdowns for each round.
Interval Timer
20:00
Ready
- Ends at
- —
- Elapsed
- 00:00
Settings
Space start or pause · R reset · F full screen
What this one is for
- Set the block, call the rounds
- Clear end-of-block alarm
- Works for any work-rest ratio
Intervals live or die on the rest. Cutting recovery short feels virtuous and reliably makes the next effort worse, which is exactly what the timer is there to prevent. It opens at 20:00; change that with the chips under the dial.
Worth knowing
- Two to one work-to-rest for conditioning, one to two for genuine sprints.
- Set the whole block and call the switches, or chain short countdowns.
- Honest rest is what makes the hard intervals hard enough to count.
Getting the most from the interval timer
- Warm up before the clock mattersTwo or three minutes of easy movement first. The block is for working, not for getting ready to work.
- Set the effort, not the distanceTime-based work holds up on a tired day because the finish line does not move.
- Come down slowlyWalk or breathe it out for the last minute rather than stopping dead when the alarm goes.
Related timers
Questions people ask
What work to rest ratio should I use?
Two to one for conditioning, such as forty seconds on and twenty off. One to two or longer for maximum-effort sprints, where the rest is the point.
Can I read the interval timer from across a room?
Yes. Full screen scales the digits to fill the display, which is legible from the floor or the far side of a garage.
Will the alarm cut through music?
At normal volume, yes. There is also a soft option if you are training somewhere quiet.
Is the interval timer free to use?
Yes, for personal and commercial use, with no sign-up and no limit. Use it in classrooms, gyms and streams without asking.