12 Minute Timer
Twelve minutes is the length of the Cooper test, a running fitness test that measures how far you can go.
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Rings even in a background tab · Space bar = start/pause
What can you do in 12 minutes?
- Cooper 12-minute run test
- One NBA quarter of game clock
- Steaming frozen dumplings
- Planning your week ahead
Tip: For the Cooper test, run on a measured track so you can record your exact distance when the timer ends.
12 minutes in other units
12 minutes
720 seconds
720,000 milliseconds
20% of an hour
fits 120 times into a day
Need a different length? Use the custom countdown timer, or set a clock-time alarm instead.
All timers
Seconds
Minutes
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Hours
12-minute timer FAQ
How do I set a timer for 12 minutes?
Press Start on this page. The 12-minute countdown begins immediately — no settings to change. Press the space bar to pause or resume.
Will the 12-minute 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.