With this 918-second countdown you always know how much time is left. 15 minutes and 18 seconds is set and ready. Start the 918 second timer with one click, pause it whenever you need and restart it just as easily.
What Can You Do With a 918 Second Timer?
15 minutes and 18 seconds is a surprisingly flexible amount of time. Here are some ideas:
- Brainstorming Round: Collect ideas in a team without discussing them. A fixed 918-second round keeps the energy high.
- Mindful Breathing: A 15 minutes and 18 seconds breathing exercise or body scan is long enough to calm your mind and short enough to fit into any day.
- Flashcard Session: Review vocabulary or exam cards for 15 minutes and 18 seconds. Short, regular sessions beat long cramming.
- Classroom Activities: Teachers use a 918 second timer for reading time, group tasks or quiz rounds so everyone can see how much time is left.
- Speeches & Pitches: Rehearse lightning talks, elevator pitches or class presentations with a visible 918-second limit.
Fun Fact: What Happens in 918 Seconds?
Alan Shepard’s Freedom 7, the first American human spaceflight in May 1961, lasted 15 minutes and 28 seconds. The 918 second timer is just 10 seconds shorter than that.
Broken down into prime factors, 918 = 2 × 3³ × 17.
How to Use the 918 Second Timer
- Everything is prepared: 15:18 is already entered, so one click on Start Timer is enough.
- Optionally add a label, enable the alarm and choose one of 13 alarm sounds (use the speaker button to preview them).
- Combine the 918-second block with breaks or other phases by adding timers; the whole sequence runs on its own.
- Use fullscreen mode for a large, distraction-free display and Export Settings to save your setup as a JSON file.
Recommended Timers for Specific Activities
Looking for a ready-made routine instead? Try one of these presets:
- Brew better coffee with the Coffee Brewing Timer.
- Pull consistent espresso shots with the Barista Workflow Timer.
- For structured workout sessions, try the HIIT Workout Timer with work and rest intervals.
- Give every product enough time to work with the Skin Care Routine Timer.
More Timer Options
Frequently Asked Questions About the 918 Second Timer
How long is a 918 second timer?
A 918 second timer runs for exactly 15 minutes and 18 seconds. That equals 15.3 minutes.
Can I pause or repeat the 918 second timer?
Absolutely. Use the pause button to stop the countdown and continue later. With the repeat option the 918 second timer restarts automatically as often as you like.
Will I hear an alarm when the time is up?
Yes. Every timer can play its own alarm sound. 13 tones are available, and the speaker button lets you listen to them first. Browsers only play sound while the tab is open and the device is not muted.
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.
Unlock the Power of 918 Seconds
Whether you are planning, training, cooking or waiting for something important, the 918 Second Timer gives your 15 minutes and 18 seconds a visible structure. Start the countdown above and make every minute count.
Plan Your 918 Seconds
Numbers that help you use the 918 second timer in practice, all calculated for exactly 15 minutes and 18 seconds.
When Does a 918-Second Countdown End?
Starting soon? Here is when the countdown ends for typical start times:
| Start | Timer ends |
|---|---|
| 07:00 (7:00 am) | 07:15:18 (7:15:18 am) |
| 09:00 (9:00 am) | 09:15:18 (9:15:18 am) |
| 12:00 (12:00 pm) | 12:15:18 (12:15:18 pm) |
| 14:30 (2:30 pm) | 14:45:18 (2:45:18 pm) |
| 18:00 (6:00 pm) | 18:15:18 (6:15:18 pm) |
| 21:00 (9:00 pm) | 21:15:18 (9:15:18 pm) |
Countdown Milestones
- A quarter done: after 3 minutes and 50 seconds, with 11 minutes and 29 seconds remaining.
- Halfway point: after 7 minutes and 39 seconds, with 7 minutes and 39 seconds remaining.
- Three quarters done: after 11 minutes and 29 seconds, with 3 minutes and 50 seconds remaining.
- Last 10 percent: after 13 minutes and 46 seconds, with 1 minute and 32 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 918 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 918 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) | 54 kcal | 71 kcal |
| Brisk walking (5.6 km/h · 3.5 mph) | 66 kcal | 88 kcal |
| Jogging, general | 107 kcal | 143 kcal |
| Running (9.7 km/h · 6 mph) | 150 kcal | 200 kcal |
| Cycling, moderate (19-22 km/h) | 122 kcal | 163 kcal |
| Swimming laps, moderate | 89 kcal | 118 kcal |
| Jumping rope, moderate | 181 kcal | 241 kcal |
| Hatha yoga | 38 kcal | 51 kcal |
How Far You Get in 918 Seconds
Distance covered at typical average speeds without stops:
| Way of moving | Speed | Distance |
|---|---|---|
| Walking | 5 km/h | 1.28 km (0.79 mi) |
| Running | 10 km/h | 2.55 km (1.58 mi) |
| Cycling | 20 km/h | 5.1 km (3.17 mi) |
| Car on the motorway | 100 km/h | 25.5 km (15.8 mi) |
| High-speed train | 300 km/h | 76.5 km (47.5 mi) |
918 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 18 seconds shorter than this timer)
- 15:00: Half-time in a football (soccer) match lasts 15 minutes. (18 seconds shorter than this timer)
- 15:00: Each quarter of an NFL game lasts 15 minutes of game time. (18 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. (10 seconds longer than this timer)
- 17:30: White rice usually simmers for about 15 to 20 minutes before it is ready. (2 minutes and 12 seconds longer than this timer)