12 Minute Timer
A 12 minute timer counts down 720 seconds and sounds an alarm when it reaches zero. That is 0.2 decimal hours on a timesheet, or 20% of an hour.
A twelve minute timer is the fixed duration of the Cooper test, the fitness assessment used by armed forces and sports teams since 1968.
Paused at 12:00
Your focus time, counted and kept
A countdown tells you when the block ends. PomoTodo records that the block happened, which task it went to and what the week added up to, so a month of 12 minute blocks becomes something you can actually look at.
Free plan tracks unlimited focus time across unlimited tasks. No card required.
The 12 minute timer at a glance
| Attribute | Value |
|---|---|
| Length | 12 minutes |
| Seconds | 720 |
| Decimal hours | 0.2 |
| Clock format | 0:12 |
| Share of an hour | 20% |
| Fraction of an hour | 1/5 |
| Blocks per hour | 5 |
| Blocks per 8 hour day | 40 |
| Pomodoros (25 min each) | 0.48 |
| Break that pairs with it | 3 minutes |
| Decimal hours are rounded to two places, which is how payroll systems record them. Blocks per hour and per day count whole blocks only and ignore the break between them, so a working day fits fewer in practice. | |
What a 12 minute timer is used for
The Cooper test, timed runs and short focused reading.
- The Cooper test
- Run as far as possible in twelve minutes, then read the distance against age and sex norms to estimate VO2 max. Kenneth Cooper designed it for the US Air Force in 1968.
- A fifth of an hour
- Twelve minutes divides an hour into five, so five blocks fill an hour exactly.
- Focused reading
- Twelve minutes covers roughly three thousand words at an average adult reading speed of two hundred and fifty words per minute.
12 minutes in other units
- 12 minutes is 720 seconds.
- On a timesheet, it is recorded as 0.2 decimal hours.
- It is 20% of an hour, or 1/5 of one.
- 5 of them fit into one hour.
- An eight hour working day holds 40, before any break between blocks.
- Against the classic twenty-five minute Pomodoro, it is 0.48 blocks.
Converting a different length is what the minutes to decimal hours converter is for, and adding several together is what the hours calculator does.
Timers either side of 12 minutes
If 12 minutes is the wrong length, the two nearest are 10 minutes and 15 minutes.
Questions about the 12 minute timer
What is the Cooper test?
A twelve minute run where the distance covered estimates aerobic fitness. Kenneth Cooper developed it for the US Air Force in 1968, and the result is read against a table of norms by age and sex to approximate VO2 max. It is still used by military and emergency services selection.
How many twelve minute blocks fit in an hour?
Five, exactly.