100 second timer
A quick countdown for small tasks. Your 100-second countdown is ready.
Ready
Minutes : Seconds
Keep this tab open for the alarm.
Related timers
How to use this 100 second timer
Get started in four simple steps.
Choose your sound
Pick one of seven alarm sounds or Off, and use Test sound to check the volume.
Start
Press Start timer when you are ready. Opening this page never starts the countdown by itself.
Pause when needed
Pause and resume at any time. Reset restores the full 100 seconds.
Time’s up
At zero the page shows Time’s up and tries to play your alarm for up to 10 seconds.
100 second timer at a glance
- Total seconds
- 100
- Starts at
- 01:40
- Half-way mark
- 00:50
100 seconds is 1 minute 40 seconds. Presets never start on their own, so you can set up first and press Start timer when you are ready.
What time will it be in 100 seconds?
If you start now, the timer ends at 3:01:40 PM.
The time above is read from your device clock and updates every second (without JavaScript it shows an example start of 3:00 PM). For other spans, use the time from now calculator.
Frequently asked questions
Still have a question? Get in touch
How many minutes is 100 seconds?
100 seconds is 1 minute 40 seconds. The timer shows it as 01:40 when it is ready to start.
Can I pause the 100 second timer?
Yes. Pause holds the remaining time and Resume continues from there. Reset returns to the full 100 seconds, and asks first while the timer is running.
Will the alarm work if I leave this tab?
Keep the tab open. Switching to another tab is usually fine, but browsers can slow down pages in the background and may block sound that was never enabled. For the best chance of hearing the alarm, keep this page open and visible and press Test sound first. Closing the tab stops the alarm.