Looking for a reliable 501 second timer? The countdown above is already set to 08:21, which is 8 minutes and 21 seconds. Press start, get an alarm when time is up and use the extra options for labels, repeats and custom messages.
Why Use a 501 Second Timer?
Here is where 8 minutes and 21 seconds fit perfectly:
- Face or Hair Mask: Most masks and treatments need 5 to 20 minutes to work, and the 501 second timer tells you when to rinse.
- Flashcard Session: Review vocabulary or exam cards for 8 minutes and 21 seconds. Short, regular sessions beat long cramming.
- Quick Workout Block: Squeeze in a bodyweight circuit, a core routine or a jump-rope session that lasts exactly 8 minutes and 21 seconds.
- Boiling Eggs: Between 6 and 12 minutes turns eggs from soft to fully hard-boiled. A 501 second timer takes the guesswork out of breakfast.
- Tidy-Up Challenge: Pick one room and see how much you can clean before the 501 seconds are over. It is a game the whole family can play.
Fun Fact: What Happens in 501 Seconds?
The Space Shuttle reached orbit about eight and a half minutes after liftoff. The 501 second timer is just 9 seconds shorter than that.
Broken down into prime factors, 501 = 3 × 167.
How to Use the 501 Second Timer
- The timer at the top of this page is already set to 08:21. Simply press Start Timer.
- Type a short note into the text field so you remember what the 501 seconds are for, and keep the alarm switched on.
- Need intervals? Use Repeat Timer or add more timers. They will run one after another automatically.
- 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
For additional timing needs, consider these helpful timers:
- Give every product enough time to work with the Skin Care Routine Timer.
- Clean your home in short bursts with the Speed Cleaning Timer.
- For mindfulness and calm breathing, the Meditation Timer guides you through every phase.
- Refine your pacing with the Speech Rehearsal Timer.
Explore More Timers
Frequently Asked Questions About the 501 Second Timer
How long is a 501 second timer?
A 501 second timer runs for exactly 8 minutes and 21 seconds. That equals 8.35 minutes.
Can I pause or repeat the 501 second timer?
Yes. While the countdown is running you can pause and resume it at any time. Enable Repeat Timer before starting to run the 501 seconds up to 100 times in a row.
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.
Start Your 501 Second Timer Now
A clear time frame turns intentions into action. Set your 501 second timer, commit to the task in front of you and let FinalTimer keep track of the 8 minutes and 21 seconds. No app, no account, completely free.
Plan Your 501 Seconds
Numbers that help you use the 501 second timer in practice, all calculated for exactly 8 minutes and 21 seconds.
When Does a 501-Second Countdown End?
Starting soon? Here is when the countdown ends for typical start times:
| Start | Timer ends |
|---|---|
| 07:00 (7:00 am) | 07:08:21 (7:08:21 am) |
| 09:00 (9:00 am) | 09:08:21 (9:08:21 am) |
| 12:00 (12:00 pm) | 12:08:21 (12:08:21 pm) |
| 14:30 (2:30 pm) | 14:38:21 (2:38:21 pm) |
| 18:00 (6:00 pm) | 18:08:21 (6:08:21 pm) |
| 21:00 (9:00 pm) | 21:08:21 (9:08:21 pm) |
Countdown Milestones
- A quarter done: after 2 minutes and 5 seconds, with 6 minutes and 16 seconds remaining.
- Halfway point: after 4 minutes and 11 seconds, with 4 minutes and 11 seconds remaining.
- Three quarters done: after 6 minutes and 16 seconds, with 2 minutes and 5 seconds remaining.
- Last 10 percent: after 7 minutes and 31 seconds, with 50 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 501 Seconds
- Tabata-style 20/10: 16 rounds of 20 seconds work and 10 seconds rest, which makes 2 complete 4-minute Tabata blocks.
- 30/30 intervals: 8 rounds of 30 seconds on and 30 seconds off.
- EMOM (every minute on the minute): 8 minutes, each starting with a fixed set of reps.
Calories Burned in 501 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) | 29 kcal | 39 kcal |
| Brisk walking (5.6 km/h · 3.5 mph) | 36 kcal | 48 kcal |
| Jogging, general | 58 kcal | 78 kcal |
| Running (9.7 km/h · 6 mph) | 82 kcal | 109 kcal |
| Cycling, moderate (19-22 km/h) | 67 kcal | 89 kcal |
| Swimming laps, moderate | 48 kcal | 65 kcal |
| Jumping rope, moderate | 99 kcal | 131 kcal |
| Hatha yoga | 21 kcal | 28 kcal |
How Far You Get in 501 Seconds
Distance covered at typical average speeds without stops:
| Way of moving | Speed | Distance |
|---|---|---|
| Walking | 5 km/h | 696 m (761 yd) |
| Running | 10 km/h | 1.39 km (0.86 mi) |
| Cycling | 20 km/h | 2.78 km (1.73 mi) |
| Car on the motorway | 100 km/h | 13.9 km (8.65 mi) |
501 Seconds Compared With Real-World Durations
- 07:27: Metallica’s “One” runs about 7 minutes and 27 seconds on the album …And Justice for All. (54 seconds shorter than this timer)
- 07:32: The longest possible total solar eclipse lasts about 7 minutes and 32 seconds. (49 seconds shorter than this timer)
- 08:02: Led Zeppelin’s “Stairway to Heaven” runs about 8 minutes. (19 seconds shorter than this timer)
- 08:19: Sunlight needs about 8 minutes and 20 seconds to travel the 149.6 million km to the Earth. (2 seconds shorter than this timer)
- 08:30: The Space Shuttle reached orbit about eight and a half minutes after liftoff. (9 seconds longer than this timer)