Use the free Sleep Log Tracker below: your data never leaves your browser — all work happens on your device, and nothing is uploaded to any server.
Most people know they sleep badly, but few know by how much. You remember the night you lay awake until three, and forget the five ordinary nights around it. A sleep log turns guesses into numbers: bedtime, wake time, hours slept, and a quality rating, recorded each morning in under a minute. After two weeks, you stop guessing and start seeing: your real average, your real bedtime, and whether the changes you try actually help.
This Sleep Log Tracker is built for that simple record. Enter the date, your bedtime and wake time, and a quality rating from poor to excellent, then press Log sleep. The tool works out the hours slept for you, including nights when you fall asleep before midnight and wake after it, which is where mental arithmetic usually goes wrong. Your average sleep across all logged nights is shown above the list, so one bad night does not hide a good pattern, and one good night does not hide a bad one.
The quality rating matters as much as the hours. Eight hours of restless sleep is not the same as eight hours of deep sleep, and a log that only counts hours misses that difference. Rate honestly: a night of waking up repeatedly is fair or poor, even if the total hours look fine. Over time, compare hours against quality. If long nights still rate poorly, the problem may be sleep quality rather than sleep length, and that is useful information for a doctor.
Bedtime consistency is the pattern most logs reveal first. Many people sleep seven hours on weekdays and ten at weekends, with bedtimes swinging by hours. That swing, sometimes called social jet lag, leaves Monday feeling like a timezone change. A log makes the swing visible, and the fix is usually boring but effective: pick a bedtime you can keep seven days a week, and protect the last hour before it from bright screens and heavy meals.
This tool is a personal log only, not medical advice. It cannot diagnose sleep apnoea, insomnia, or any other condition, and it should not be used to decide about sleep medicine. If you snore loudly and wake unrefreshed, if you cannot fall asleep for weeks, or if daytime sleepiness affects your driving or work, talk to a doctor. Bring your log with you: a month of bedtimes and quality ratings is far more useful in an appointment than ‘I sleep badly.’
Your entries are saved in your browser when storage is available. If storage is blocked, for example in a private window, entries are kept only while the page stays open. Export a backup file regularly, and import it if you switch devices, since there is no account syncing your log. A sleep log gains value with time, so a backup is worth the ten seconds it takes.
How to log your sleep
- Each morning, enter yesterday’s bedtime and today’s wake time.
- Rate the night’s quality from poor to excellent.
- Press Log sleep and check the hours worked out for you.
- Review your average weekly, not daily, to see real trends.
- Export a backup file regularly.
Frequently asked questions
Does it handle sleeping past midnight? Yes. A bedtime of 23:00 and a wake time of 07:00 correctly gives 8 hours.
Is this medical advice? No. It is a personal log only. For ongoing sleep problems, see a doctor.
Why rate quality as well as hours? Because restless long nights and restful short nights are different, and the rating captures that.
Is my log saved? In your browser when storage is available. If blocked, it lasts only while the page is open, so export a backup.
Sleep is the one health habit you do for a third of your life. Log it honestly for a month, and you will finally know how you really sleep.