A deep-work interval
Start the timer when the activity begins, then use the visual ring to check progress without reading a clock.
Free online countdown
45 Minute Timer
Forty-five minutes is a common lesson and meeting length with room for meaningful progress.
Ready
Keyboard: Space starts or pauses, R resets, F enters fullscreen.
Practical ideas
What can you time in 45 minutes?
A lesson or workshop segment
Start the timer when the activity begins, then use the visual ring to check progress without reading a clock.
An endurance workout
Start the timer when the activity begins, then use the visual ring to check progress without reading a clock.
A useful way to run this timer
Reserve the final five minutes for questions, cooldown, or a written summary.
Choose another duration
Related online timers
40 MinutesForty minutes supports sustained attention without committing to a full hour.
50 MinutesFifty minutes leaves a natural ten-minute break inside a one-hour schedule.
35 MinutesThirty-five minutes adds useful review time to a standard half-hour working block.
30 MinutesThirty minutes is a practical half-hour block for work, learning, exercise, and appointments.
60 MinutesSixty minutes provides a clear one-hour boundary for substantial tasks and scheduled activities.
25 MinutesTwenty-five minutes is the familiar focus interval used in the Pomodoro Technique.
Timer help
Frequently asked questions
How do I start the 45 minutes timer?
Press Start to begin the preset 45 minutes countdown. You can pause, reset, change the duration, enter fullscreen, or share the page.
Will the timer stay accurate in a background tab?
The timer calculates from a fixed end time instead of trusting delayed browser intervals. Keep the tab open and your device awake if you need to hear the alarm.
How many seconds are in 45 minutes?
45 minutes equal 2,700 seconds.