3 Hour Timer
Three hours suits low-and-slow oven cooking like pot roast, as well as long endurance efforts.
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Rings even in a background tab · Space bar = start/pause
What can you do in 3 hours?
- Oven-braised pot roast
- Chasing a sub-3 marathon
- Road trip driving leg
- Long exam study block
Tip: Check the braising liquid about halfway through and top it up if it has reduced too much.
3 hours in other units
180 minutes
10,800 seconds
10,800,000 milliseconds
300% of an hour
fits 8 times into a day
Need a different length? Use the custom countdown timer, or set a clock-time alarm instead.
All timers
Seconds
Minutes
1 min2 min3 min4 min5 min6 min7 min8 min9 min10 min11 min12 min13 min14 min15 min16 min17 min18 min19 min20 min21 min22 min23 min24 min25 min26 min27 min28 min29 min30 min31 min32 min33 min34 min35 min36 min37 min38 min39 min40 min41 min42 min43 min44 min45 min46 min47 min48 min49 min50 min51 min52 min53 min54 min55 min56 min57 min58 min59 min
Hours
3-hour timer FAQ
How do I set a timer for 3 hours?
Press Start on this page. The 3-hour countdown begins immediately — no settings to change. Press the space bar to pause or resume.
Will the 3-hour timer ring if I switch tabs?
Yes. The countdown runs from a fixed end time, so it keeps going and rings in a background tab. The remaining time also shows in the tab title. Keep the tab open and the device unmuted.
Can I get a notification when it ends?
Yes — allow notifications when your browser asks after you press Start. You'll get a desktop or phone notification in addition to the beep.
Does it work offline?
Yes. After your first visit the page is cached, so the timer works without an internet connection.