150 Minute Timer
This free 150 minute timer is ready to go — the countdown is already set to 2 hours 30 minutes. Press Start and watch it tick down; a built-in alarm sound plays at zero. No download, no signup; works on desktop and mobile.
What is this timer good for?
- A long focus or writing block with scheduled breaks
- Slow cooking, braising or smoking food
- Tracking a parking meter or appointment window
- A movie-length rest, nap or quiet period
- Capping screen time or a gaming session for kids
How to use it
- The timer opens preset to 2 hours 30 minutes.
- Adjust the hours, minutes or seconds for a different length.
- Press Start and the big display counts down.
- An alarm sounds at 00:00:00 — press Reset to run it again.
How long is 2 hours 30 minutes?
150 minutes works out to 2 hours and 30 minutes (about 2.50 hours), or 9,000 seconds in total. That is roughly 10.4% of a 24-hour day. Half of 2 hours 30 minutes is 1 hour 15 minutes, and two rounds back to back add up to 5 hours.
150 minutes comes to 2 hours 30 minutes — about the runtime of a feature film, which makes it a handy preset for a movie night with a hard stop.
Things that take about 2 hours 30 minutes
- Set 2 hours 30 minutes for a slow-cooker, brisket or braise you must not forget about.
- Track a 150-minute parking window, airport layover or appointment slot.
- Time long household projects — defrosting a freezer, deep-cleaning a kitchen, a full laundry queue.
- Cap a long study session at 2 hours 30 minutes and schedule real rest afterwards.
FAQ
Will it ring if I switch tabs?
Yes. The timer calibrates against your system clock, so it stays accurate even in a background tab. Just don't close the tab.
Do I need to download anything?
No. The timer runs entirely in your browser with no download, signup or plugin.
Can I change the duration?
Yes. Type any hours, minutes and seconds into the fields, or pick a related timer above.
Is it free?
Yes, it is completely free to use.
How many seconds are in 150 minutes?
150 minutes equals exactly 9,000 seconds (150 × 60).
How long is 150 minutes in hours?
150 minutes is 2 hours and 30 minutes, or about 2.50 hours.
Can I restart the 150-minute countdown when it finishes?
Yes. When the alarm sounds, press Reset and then Start to run the full 2 hours 30 minutes again — handy for repeated rounds.