A 45 minute timer matches the standard school class period in many countries, making it the go-to classroom timer for teachers. It's equally useful for yoga sessions, cycling workouts, and structured study blocks. Use fullscreen mode to project it across a room.
Enable Repeat to automatically restart the countdown — perfect for interval training or back-to-back sessions. Enable End Time to see the exact clock time your timer will finish.
Click the Countdown tab and click the 45m preset button. Press play or Space to start. The alarm sounds when 45 minutes are up.
Click the 45m preset in the Countdown tab, then click Fullscreen. Large, high-contrast digits fill the screen — clearly visible from the back of a classroom. The alarm sounds at the end of the period.
Yes. Enable the End Time toggle before starting. Polytimer will display the exact clock time when your countdown will finish — e.g., "Ends at 10:45".