Interval timer

Runs in your browser. Nothing you type is sent anywhere.

Get ready

Get ready: 10 seconds left.

Total left 07:50
Workout

Times like 20, 0:45, or 1m. A plain number is seconds.

How to use the interval timer

  1. Set the work and rest times, the number of rounds, and how many sets.
  2. Press Start, or the space bar. You get a short countdown to get ready.
  3. Three beeps count you in to each round. A low beep means rest.
  4. Turn on Voice to hear "Work" and "Rest" as well.

Questions

How do I type the times?

A plain number is seconds, so 45 means 45 seconds. You can also type 1:30, 90s, or 2m. Set Rest to 0 for rounds back to back, and Get ready to 0 to start straight away.

What's the difference between rounds and sets?

A round is one work interval and the rest after it. A set is a group of rounds. With 8 rounds and 3 sets, you do 8 rounds, take the longer rest between sets, and repeat three times.

Can I hear it without looking at the screen?

Yes. Three short beeps count down the last seconds before each work interval, a long beep starts it, and a low beep starts each rest. Turn on Voice to hear the name of each part, spoken by your device.

Does it stay in time if I switch apps?

The beeps are scheduled ahead of time and the timer works out where you are from your device's clock, so it stays right in a background tab. On iPhone and iPad, keep this tab open, because Safari pauses hidden tabs.

What keyboard shortcuts are there?

Space starts and pauses, N skips to the next part, R resets, F goes full screen, and M turns the beeps on or off.

Is anything sent to a server?

No. The timer runs in your browser and your workout is remembered on this device only.