138 seconds
An online timer of 138 seconds provides a quick start and reliable tracking of a short time interval. As soon as the time is up, you will hear a signal that is set by default or that you have selected yourself in advance.
To improve your view, switch to full-screen mode.
Everything works via a regular browser from any device, so launching it becomes a matter of a few seconds.
An online 138 seconds timer is convenient for controlling small intervals: short workouts, meditations, speed checks, and brief breaks. Starts with a single click and keeps counting even when you switch tabs.
In other units:
138 seconds equals 2 minutes 18 seconds.
No. The 138 seconds timer runs in the browser — on phone, tablet, or computer. No apps to install, no sign-up needed.
Yes, the countdown continues even when you switch tabs. The remaining time is also shown in the browser tab title, so you won't miss the end.
Yes, settings let you pick different sounds and adjust the volume. You can also mute it entirely.
Yes, there's a full-screen mode — handy for presentations, classes, workouts, and group sessions.
The timer uses the device's system clock and stays accurate even on long intervals. Countdown precision is to the second.
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