400 minute timer
Press Start and an alarm will ring in exactly 6 hours and 40 minutes. Good for a long work block or slow cooking.
400 minutes is 6 hours and 40 minutes, 6.66667 hours, or 24,000 seconds. The timer keeps exact time in a background tab and shows the time left in the tab title. Press Space to pause, R to reset, F for full screen.
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Set a custom timer · Stopwatch · Pomodoro timer · Classroom timer