Need a different time? Set a custom countdown timer or pick another one: 25 minute timer · 30 minute timer · 45 minute timer · 50 minute timer.
This timer counts down 40 minutes (2400 seconds) and plays an alarm at zero. It is handy for a school lesson, a longer workout or a deep-work block. It runs entirely in your browser: nothing is uploaded.
Press Start on this page. The 40 minute timer is already set to 40:00 and sounds an alarm when it reaches zero. Press Pause to stop it and Reset to start over.
Common uses are a school lesson, a longer workout or a deep-work block.
Usually yes. The timer follows the clock, so it stays accurate in a background tab, and the remaining time shows in the tab title. Keep the page open until it finishes, because it cannot ring after you close it. Some browsers block sound until you have clicked on the page, which pressing Start counts as.
40 minutes are 2400 seconds.
See also: All timers · 10 second timer · 15 second timer · Pomodoro timer · Stopwatch