45 Minute Timer
This free 45 minute timer is ready to go — the countdown is already set to 45 minutes. Just press Start and watch it tick down. When it reaches zero a built-in alarm sound plays. No download, no signup; works on desktop and mobile.
What is this timer good for?
- A deep-work or Pomodoro-style focus block
- A revision or reading session before a rest
- Marinating, proofing dough or slow-roasting
- A full workout or class with warm-up and cooldown
- A longer nap or rest period
How to use it
- The timer opens preset to 45 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 45 minutes?
45 minutes converts to 2,700 seconds, or about 75% of an hour. That is roughly 3.1% of a 24-hour day. Half of 45 minutes is 22 minutes 30 seconds, and two rounds back to back add up to 1 hour 30 minutes.
Forty-five minutes is one half of a football (soccer) match.
Things that take about 45 minutes
- Roast a chicken, bake a casserole or simmer a sauce that needs about 45 minutes.
- Race through a 45-minute house clean, moving to a new room every few minutes.
- Let dough rise or a marinade soak for 45 minutes before the next step.
- Block 45 minutes for deep work — long enough for real progress, short enough to stay sharp.
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 45 minutes?
45 minutes equals exactly 2,700 seconds (45 × 60).
What fraction of an hour is 45 minutes?
45 minutes is about 75% of an hour (45/60).
Can I restart the 45-minute countdown when it finishes?
Yes. When the alarm sounds, press Reset and then Start to run the full 45 minutes again — handy for repeated rounds.