12 minute timer
Twelve minutes is the length of a quarter in the NBA and of the Cooper running test.
Ready
Ends 12 minutes after you press Start.
Keyboard: Space start or pause, R reset, F full screen.
12 minutes in other units
- Seconds
- 720
- Share of an hour
- 20%
- 1/5 of an hour
- On the timer
- 12:00
- Back to back
- 120 a day
- fit exactly into 24 hours
What a 12 minute timer is good for
- Basketball quarters. NBA games are played in four 12-minute quarters.
- The Cooper test. A fitness test from 1968: run or walk as far as you can in 12 minutes.
- Hard-boiled eggs. Twelve minutes is at the firm end of hard-boiled egg timings.
Other timers
About this timer
The countdown runs against your device's clock from the moment you press Start, so it stays accurate in a background tab. The line under the digits shows the local time it will end. Pick one of ten alarm sounds, all generated in your browser (hear them on the countdown sounds page), and use full screen to read the time from across a room. Need a different length? Set a custom timer.
Related
Frequently asked questions
How do I set a timer for 12 minutes?
This page is already set to 12 minutes. Press Start, or the Space bar, and the countdown begins; when it reaches zero, the alarm sounds and the page shows Time's up. Pause stops the clock and Reset takes it back to 12 minutes.
How many seconds are in 12 minutes?
720 seconds, or 1/5 of an hour.
What is the Cooper test?
A fitness test devised by Dr. Kenneth Cooper in 1968. You cover as much distance as you can in 12 minutes, running or walking, then compare it with tables for your age and sex.
Will the alarm go off if I switch tabs?
In most desktop browsers, yes. The countdown is worked out from the real clock, and the alarm is scheduled with the browser's sound engine when you press Start, so it stays on time in a background tab. Phones can pause web pages when the screen locks, so keep the screen on — the timer asks the browser to do that where it can — and turn the volume up.