The free online 904 second timer on FinalTimer.com counts down 15 minutes and 4 seconds without an app and without an account. Set it, start it and get back to what matters.
Practical Uses for a 904 Second Timer
A countdown of 15 minutes and 4 seconds works well for situations like these:
- Stand-Up Meeting: Daily stand-ups should stay short. A visible 904-second countdown keeps every update to the point.
- Focused Sprint: Clear your inbox, answer messages or outline an idea in one focused 904-second sprint without checking the clock.
- Quick Workout Block: Squeeze in a bodyweight circuit, a core routine or a jump-rope session that lasts exactly 15 minutes and 4 seconds.
- Baking Cookies: Many cookie and muffin recipes bake for 10 to 25 minutes, and the 904 second timer makes sure nothing burns.
- Screen-Time Limits: Agree on 15 minutes and 4 seconds of gaming or social media and let the alarm end the session instead of a discussion.
Fun Fact About 904 Seconds
Half-time in a football (soccer) match lasts 15 minutes. That is almost exactly the length of this 904 second timer. The difference is only 4 seconds.
Broken down into prime factors, 904 = 2³ × 113.
How to Use the 904 Second Timer
- The timer at the top of this page is already set to 15:04. Simply press Start Timer.
- Type a short note into the text field so you remember what the 904 seconds are for, and keep the alarm switched on.
- Combine the 904-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
Looking for a ready-made routine instead? Try one of these presets:
- Refine your pacing with the Speech Rehearsal Timer.
- For precision cooking, the Pasta Cooking Timer makes sure your pasta is perfectly al dente.
- Brew better coffee with the Coffee Brewing Timer.
- Find the perfect steeping time with the Tea Brewing Timer.
Explore More Timers
Frequently Asked Questions About the 904 Second Timer
How long is a 904 second timer?
A 904 second timer runs for exactly 15 minutes and 4 seconds. That equals 15.1 minutes.
Can I pause or repeat the 904 second timer?
Absolutely. Use the pause button to stop the countdown and continue later. With the repeat option the 904 second timer restarts automatically as often as you like.
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.
Start Your 904 Second Timer Now
Ready? Press Start Timer and let the 904 second timer do the counting. When the 904 seconds are over, the alarm and your final message will let you know on desktop, tablet or phone.
Plan Your 904 Seconds
Numbers that help you use the 904 second timer in practice, all calculated for exactly 15 minutes and 4 seconds.
When Does a 904-Second Countdown End?
Starting soon? Here is when the countdown ends for typical start times:
| Start | Timer ends |
|---|---|
| 07:00 (7:00 am) | 07:15:04 (7:15:04 am) |
| 09:00 (9:00 am) | 09:15:04 (9:15:04 am) |
| 12:00 (12:00 pm) | 12:15:04 (12:15:04 pm) |
| 14:30 (2:30 pm) | 14:45:04 (2:45:04 pm) |
| 18:00 (6:00 pm) | 18:15:04 (6:15:04 pm) |
| 21:00 (9:00 pm) | 21:15:04 (9:15:04 pm) |
Countdown Milestones
- A quarter done: after 3 minutes and 46 seconds, with 11 minutes and 18 seconds remaining.
- Halfway point: after 7 minutes and 32 seconds, with 7 minutes and 32 seconds remaining.
- Three quarters done: after 11 minutes and 18 seconds, with 3 minutes and 46 seconds remaining.
- Last 10 percent: after 13 minutes and 34 seconds, with 1 minute and 30 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 904 Seconds
- Tabata-style 20/10: 30 rounds of 20 seconds work and 10 seconds rest, which makes 3 complete 4-minute Tabata blocks.
- 30/30 intervals: 15 rounds of 30 seconds on and 30 seconds off.
- EMOM (every minute on the minute): 15 minutes, each starting with a fixed set of reps.
Calories Burned in 904 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) | 53 kcal | 70 kcal |
| Brisk walking (5.6 km/h · 3.5 mph) | 65 kcal | 86 kcal |
| Jogging, general | 105 kcal | 141 kcal |
| Running (9.7 km/h · 6 mph) | 148 kcal | 197 kcal |
| Cycling, moderate (19-22 km/h) | 121 kcal | 161 kcal |
| Swimming laps, moderate | 87 kcal | 117 kcal |
| Jumping rope, moderate | 178 kcal | 237 kcal |
| Hatha yoga | 38 kcal | 50 kcal |
How Far You Get in 904 Seconds
Distance covered at typical average speeds without stops:
| Way of moving | Speed | Distance |
|---|---|---|
| Walking | 5 km/h | 1.26 km (0.78 mi) |
| Running | 10 km/h | 2.51 km (1.56 mi) |
| Cycling | 20 km/h | 5.02 km (3.12 mi) |
| Car on the motorway | 100 km/h | 25.1 km (15.6 mi) |
| High-speed train | 300 km/h | 75.3 km (46.8 mi) |
904 Seconds Compared With Real-World Durations
- 14:00: A rugby sevens match has only 14 minutes of playing time: two halves of seven minutes. (1 minute and 4 seconds shorter than this timer)
- 15:00: Half-time in a football (soccer) match lasts 15 minutes. (4 seconds shorter than this timer)
- 15:00: Each quarter of an NFL game lasts 15 minutes of game time. (4 seconds shorter than this timer)
- 15:28: Alan Shepard’s Freedom 7, the first American human spaceflight in May 1961, lasted 15 minutes and 28 seconds. (24 seconds longer than this timer)
- 17:30: White rice usually simmers for about 15 to 20 minutes before it is ready. (2 minutes and 26 seconds longer than this timer)