100 Minute Timer
Set a timer for 100 minutes. Need an alarm in 100 minutes? Press start and it rings when the countdown hits zero.
Ready
More options
Shortcuts: Space start or pause, R reset, F fullscreen, M mute
About this timer
One hour 40 minutes: close to the running time of a typical feature film, so it works as a "the movie should be over by now" check for kids' screen time. In school terms, it's two 50-minute periods back to back. Keep your device plugged in so it doesn't go to sleep before the end.
Timers this long are set once and forgotten: baking and braising, parking meters, long study or work blocks, and charging cycles. Because the countdown is anchored to a real clock time, it stays accurate for hours in a background tab, and it survives a page refresh.
Need a different length? Set a custom timer in hours, minutes and seconds, or pick one of the presets below.
100 Minutes in other units
100 Minutes = 6,000 seconds = 1.667 hours
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Questions about how it works? See the FAQ