45 second timer
A forty-five second timer with a sound at the end. Forty-five seconds is the work half of the most common circuit format there is: 45 on, 15 off.
00:45
RingBar
Presets
Take it with you in the app
This tool runs in your browser. Want it on your phone, with voice cues, background timing and a real alarm? Open the same tool in NanoTimer.
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How it works
- Tap Start and work until the tone.
- In a 45/15 circuit this is the working interval; the fifteen second timer is the rest.
- It also suits a long plank or a held stretch, where the last ten seconds are the ones that count.
- For the full circuit with rounds, use the interval timer instead of restarting this.
Frequently asked questions
- Why is 45/15 so common?
- Because it divides a minute cleanly and leaves just enough rest to keep form without letting the heart rate drop. It is long enough to get real work done in a station and short enough to keep a class moving.
- Is forty-five seconds long for a plank?
- It is a reasonable target once thirty seconds feels easy. What matters more than the number is that the form holds all the way to the tone; a shorter, straighter plank beats a longer sagging one.
- Can I run a whole circuit here?
- This page is one countdown. For a circuit that alternates work and rest across rounds, the interval timer handles it, and the app speaks each phase so you do not have to look.