Timers · 45 minutes
45 minutes timer
Start a 45 minutes countdown or watch a 45 minutes count-up. Runs in your browser.
00:00
Ready — 45 minutes
In 45 minutes…
- A common school period length in many countries is about 45 minutes.
- At a typical marathon pace near 5:00/km, 45 minutes covers about 9 kilometers.
Analogies use common textbook figures (e.g. light travel time ≈ 499 s for 1 AU). They are illustrative, not laboratory measurements.
More: all duration timers
About this page
This free online 45 minutes timer counts down from 45 minutes, or counts up to 45 minutes if you prefer to see elapsed time. It is handy for a class period, a deep-work block or a longer workout. Choose Countdown or Count-up, then use Start, Pause and Reset. Everything runs in your browser — no app, sign-up or download.
Frequently asked questions
How do I start the 45 minutes timer?
Pick Countdown or Count-up and press Start. Pause stops the clock without losing progress, and Reset sets it back to the beginning.
What happens when the time is up?
The display switches to a finished state and the status line says the time is up. On phones that support it, the device also vibrates briefly. The timer does not play a sound.
Do I need an account or an app?
No. The timer is a web page that works in any modern browser on desktop or mobile, without signing up.
Can I pick another duration?
Yes. The timers page lists 1, 5, 10, 15, 25, 30, 45 and 60-minute timers.