12-Minute Timer
Press start. It counts down to zero and rings an alarm — nothing to download, nothing to sign up for.
About this 12-minute timer
A one-click 12-minute countdown, most often used for the Cooper running test, baking cookies, or a mid-length focus block. It runs in your browser and rings when it reaches zero.
Twelve minutes: the Cooper test
Twelve minutes is the length of the Cooper test, a classic fitness assessment devised by Dr Kenneth Cooper in 1968: run as far as you can in 12 minutes and compare the distance with age-based tables. It's also a typical bake time for cookies.
12 minutes in other units
| Seconds | 720 |
|---|---|
| Minutes | 12 |
| Hours | 0.2 |
| Milliseconds | 720,000 |
| Share of a day | 0.83% |
Tips for using a 12-minute timer
- For the Cooper test, use a track or a measured route so you know the exact distance at the end.
- Most drop cookies bake in 9-12 minutes; pull them when the edges are set and the middles still look soft.
- Twelve minutes is a common soak time for wooden skewers before grilling, though longer is better.
Frequently asked questions
How do I set a 12-minute timer?
Press Start above and the page counts down from 12 minutes on its own — nothing to type. Need a little longer? Press +1 min while it runs, or pick a nearby duration from the list.
How many seconds are in 12 minutes?
12 minutes is 720 seconds — 12 minutes or 0.2 hours. That's 0.83% of a day.
What is a 12-minute timer good for?
People commonly use a 12-minute timer for the Cooper running test, baking cookies, or a mid-length focus block.
Will it keep time if I switch tabs?
Yes. The countdown is measured against your device clock rather than counting screen refreshes, so it stays accurate in a background tab and the alarm fires on time. Some browsers need one click on the page before they allow sound.