Time flies when you are busy, and a 309 second timer makes it visible. This free online countdown measures 5 minutes and 9 seconds precisely and lets you add your own text, an alarm and a final message.
What Can You Do With a 309 Second Timer?
A countdown of 5 minutes and 9 seconds works well for situations like these:
- Herbal Tea: Herbal and fruit teas release their full flavour after 5 to 8 minutes of steeping.
- Speeches & Pitches: Rehearse lightning talks, elevator pitches or class presentations with a visible 309-second limit.
- Classroom Activities: Teachers use a 309 second timer for reading time, group tasks or quiz rounds so everyone can see how much time is left.
- Focused Sprint: Clear your inbox, answer messages or outline an idea in one focused 309-second sprint without checking the clock.
- Brainstorming Round: Collect ideas in a team without discussing them. A fixed 309-second round keeps the energy high.
Did You Know? 309 Seconds in Perspective
Queen’s “Bohemian Rhapsody” (1975) runs 5 minutes and 55 seconds. The 309 second timer is just 46 seconds shorter than that.
Broken down into prime factors, 309 = 3 × 103.
Start Your 309 Second Timer in Seconds
- Everything is prepared: 05:09 is already entered, so one click on Start Timer is enough.
- Give your countdown a name in the text field, switch on the alarm and pick the sound you like best.
- Combine the 309-second block with breaks or other phases by adding timers; the whole sequence runs on its own.
- Share your setup with a link or export it as JSON, perfect for teams, classes and training partners.
Recommended Timers for Specific Activities
For additional timing needs, consider these helpful timers:
- Practise your talk with the Presentation Timer, including warnings before time runs out.
- Find the perfect steeping time with the Tea Brewing Timer.
- For structured workout sessions, try the HIIT Workout Timer with work and rest intervals.
- Refine your pacing with the Speech Rehearsal Timer.
More Timer Options
Frequently Asked Questions About the 309 Second Timer
How long is a 309 second timer?
A 309 second timer runs for exactly 5 minutes and 9 seconds. That equals 5.15 minutes.
Can I pause or repeat the 309 second timer?
You can pause at any moment (also with the space bar) and resume exactly where you stopped. To run the 309 seconds several times, switch on Repeat Timer and choose how often.
Will I hear an alarm when the time is up?
Yes, if Enable Alarm is checked. You can choose between 13 alarm sounds and preview them before starting. Keep the browser tab open and the sound of your device switched on.
Do I need to install anything?
No. FinalTimer works directly in your browser on desktop, tablet and smartphone. There is no app, no registration and no cost.
Make the Most of 309 Seconds
From the kitchen to the classroom and from the gym to the office: the 309 second timer adapts to your day. Bookmark this page to have your 309-second countdown just one click away.
Plan Your 309 Seconds
Numbers that help you use the 309 second timer in practice, all calculated for exactly 5 minutes and 9 seconds.
When Does a 309-Second Countdown End?
Starting soon? Here is when the countdown ends for typical start times:
| Start | Timer ends |
|---|---|
| 07:00 (7:00 am) | 07:05:09 (7:05:09 am) |
| 09:00 (9:00 am) | 09:05:09 (9:05:09 am) |
| 12:00 (12:00 pm) | 12:05:09 (12:05:09 pm) |
| 14:30 (2:30 pm) | 14:35:09 (2:35:09 pm) |
| 18:00 (6:00 pm) | 18:05:09 (6:05:09 pm) |
| 21:00 (9:00 pm) | 21:05:09 (9:05:09 pm) |
Countdown Milestones
- A quarter done: after 1 minute and 17 seconds, with 3 minutes and 52 seconds remaining.
- Halfway point: after 2 minutes and 35 seconds, with 2 minutes and 35 seconds remaining.
- Three quarters done: after 3 minutes and 52 seconds, with 1 minute and 17 seconds remaining.
- Last 10 percent: after 4 minutes and 38 seconds, with 31 seconds remaining.
Speakers, teachers and exam supervisors often give a warning at the 75 % or 90 % mark. Add a second timer for the warning if you want an extra alarm.
Intervals That Fit Into 309 Seconds
- Tabata-style 20/10: 10 rounds of 20 seconds work and 10 seconds rest, which makes 1 complete 4-minute Tabata block.
- 30/30 intervals: 5 rounds of 30 seconds on and 30 seconds off.
- EMOM (every minute on the minute): 5 minutes, each starting with a fixed set of reps.
Calories Burned in 309 Seconds
Estimated energy use for common activities, calculated with MET values from the Compendium of Physical Activities (kcal = MET × body weight in kg × hours). Real values vary with fitness, age and intensity.
| Activity | 60 kg (132 lb) | 80 kg (176 lb) |
|---|---|---|
| Walking (4.8 km/h · 3 mph) | 18 kcal | 24 kcal |
| Brisk walking (5.6 km/h · 3.5 mph) | 22 kcal | 30 kcal |
| Jogging, general | 36 kcal | 48 kcal |
| Running (9.7 km/h · 6 mph) | 50 kcal | 67 kcal |
| Cycling, moderate (19-22 km/h) | 41 kcal | 55 kcal |
| Swimming laps, moderate | 30 kcal | 40 kcal |
| Jumping rope, moderate | 61 kcal | 81 kcal |
| Hatha yoga | 13 kcal | 17 kcal |
How Far You Get in 309 Seconds
Distance covered at typical average speeds without stops:
| Way of moving | Speed | Distance |
|---|---|---|
| Walking | 5 km/h | 429 m (469 yd) |
| Running | 10 km/h | 858 m (939 yd) |
| Cycling | 20 km/h | 1.72 km (1.07 mi) |
| Car on the motorway | 100 km/h | 8.58 km (5.33 mi) |
309 Seconds Compared With Real-World Durations
- 04:54: Michael Jackson’s “Billie Jean” runs about 4 minutes and 54 seconds on the album Thriller. (15 seconds shorter than this timer)
- 04:55: Toto’s “Africa” (1982) runs 4 minutes and 55 seconds. (14 seconds shorter than this timer)
- 05:00: An Ignite talk lasts exactly five minutes: 20 slides that advance automatically every 15 seconds. (9 seconds shorter than this timer)
- 05:00: Rounds in mixed martial arts, for example in the UFC, last five minutes. (9 seconds shorter than this timer)
- 05:01: Nirvana’s “Smells Like Teen Spirit” runs about 5 minutes and 1 second. (8 seconds shorter than this timer)