[{"data":1,"prerenderedAt":86},["ShallowReactive",2],{"page:type=timer&slug=8-hours&locale=en":3},{"locale":4,"alternates":5,"title":8,"description":9,"h1":10,"lead":11,"breadcrumbs":12,"sections":21,"faq":36,"related":49,"updated":80,"tool":81,"schema":83},"en",{"es":6,"en":7},"\u002Ftemporizador\u002F8-horas","\u002Fen\u002Ftimer\u002F8-hours","8 hours timer ⏱ online with alarm","Free 8 hours timer: press Start and an alarm rings when it ends. Full screen, several sounds and works offline.","8 hours timer","8 hours countdown with alarm.",[13,16,19],{"name":14,"path":15},"Home","\u002Fen",{"name":17,"path":18},"Timer","\u002Fen\u002Ftimer",{"name":20,"path":7},"8 hours",[22,26,32],{"paragraphs":23},[24,25],"This timer is set to 8 hours. That is 28,800 seconds, 480 minutes, 28,800,000 milliseconds. It is 33.3% of a day.","During 8 hours a resting heart beats about 33,600 times and a person walks roughly 38,400 metres at an easy pace.",{"heading":27,"list":28},"What is a 8 hours timer good for?",[29,30,31],"intermittent fasting","bread dough and fermentation","medication reminders",{"heading":33,"paragraphs":34},"How to use it",[35],"Press the space bar or the Start button. When it reaches zero your chosen sound plays; on the main timer page you can add and chain several timers for intervals. Sound and volume settings are saved in your browser.",[37,40,43,46],{"q":38,"a":39},"How many seconds is 8 hours?","8 hours equals 28,800 seconds.",{"q":41,"a":42},"How do I set a 8 hours timer?","Press Start: the time is already set. You can pause it, reset it, change the sound or go full screen.",{"q":44,"a":45},"Will it ring if I switch tabs?","Yes. The timer keeps running in the background and rings when it ends as long as the page stays open; the tab title shows the time left.",{"q":47,"a":48},"Will my screen turn off?","In supported browsers the \"Keep the screen on\" option uses the Wake Lock API to prevent it.",[50,53,56,59,62,65,68,71,74,77],{"label":51,"path":52},"4 hours timer","\u002Fen\u002Ftimer\u002F4-hours",{"label":54,"path":55},"5 hours timer","\u002Fen\u002Ftimer\u002F5-hours",{"label":57,"path":58},"6 hours timer","\u002Fen\u002Ftimer\u002F6-hours",{"label":60,"path":61},"7 hours timer","\u002Fen\u002Ftimer\u002F7-hours",{"label":63,"path":64},"9 hours timer","\u002Fen\u002Ftimer\u002F9-hours",{"label":66,"path":67},"10 hours timer","\u002Fen\u002Ftimer\u002F10-hours",{"label":69,"path":70},"12 hours timer","\u002Fen\u002Ftimer\u002F12-hours",{"label":72,"path":73},"24 hours timer","\u002Fen\u002Ftimer\u002F24-hours",{"label":75,"path":76},"All timers","\u002Fen\u002Ftimer\u002Flist",{"label":78,"path":79},"Stopwatch","\u002Fen\u002Fstopwatch","2026-10-23T13:43:25.849Z",{"seconds":82},28800,{"app":84},{"name":10,"category":85},"UtilitiesApplication",1792763005835]