30 Second Timer
A 30 second countdown, ready to go. Press Start and it sounds at zero. Short enough to repeat, long enough to count.
No signup. Works in any browser. A clear sound when time is up.
What 30 seconds is good for
- A plank or wall sit hold when you are starting out
- Interval training: 30 seconds hard, 30 seconds easy, repeated
- Quick-fire rounds in class or a quiz, one answer each
- Brushing teeth: two minutes split across four parts of your mouth is 30 seconds each
Running a set of intervals
This page times one 30 second block. Press Reset, then Start, for the next one. For a whole set of 30 on, 30 off, it is easier to start the 10 minute timer and switch between work and rest every time the seconds pass :30 and :00.
Why not just count in your head
Counting to 30 while you are working hard tends to speed up. A timer keeps every hold and every interval the same length, so this week's session is a fair comparison with last week's.
How the timer works
- Press Start and it counts down. Change the hours, minutes or seconds first if you need a different length.
- It works from your device clock, so it stays right in a background tab, and the time left shows in the tab title.
- Pick an end sound (chime, bell, beep, gentle or silent). The full screen button puts the timer alone on the screen.
- Keeps working offline once the page has loaded. No account, nothing to install.
Frequently asked questions
How do I restart the 30 second timer quickly?
Press Reset, then Start. The length stays at 30 seconds until you change it.
Can I change it to 45 or 20 seconds?
Yes. Before you press Start, type a new number in the seconds box. 0 minutes and 45 seconds gives you 45 seconds.
Which end sound is easiest to hear in a gym?
Beep. It is a short, sharp tone that cuts through music better than the chime.
Is it free?
Yes. No signup and nothing to install.
Further reading
Other timers
Need to count up instead? Use the online stopwatch.