90 Minute Timer
Start a free 90-minute countdown instantly with sound alerts, pause and reset controls, and fullscreen styles. No sign-up, download or ads.
About the 90-minute timer
A 90-minute timer lasts 5,400 seconds. This page loads that exact duration, keeps the countdown accurate in a background tab, and alerts you when time is up.
Ways to use a 90-minute timer
Useful for exams, workshops, long study sessions, events, and projects that need a visible countdown over an hour.
Frequently asked questions
How do I start the 90-minute timer?
The 90-minute timer starts automatically when this page opens. You can pause, resume, reset, or adjust it at any time.
Will the timer play a sound?
Yes. A sound alert plays when the countdown reaches zero. Keep this tab open and make sure your browser or device is not muted.
Does the timer keep running in another tab?
Yes. The countdown uses its target finish time, so it stays accurate when you switch tabs. Keep the page open so the finish alert can play.