FREE SLEEP TOOLS / 03
Nap calculator
Make a little room to recharge.
Pick a nap length and see when to set your alarm.
How the calculation works
Enter the time you plan to lie down, how long you want to sleep, and the minutes you expect to need to fall asleep.
How we calculated it
Keep naps in your sleep routine
This is a planned nap end, not an alarm. NiceSleep supports nap sessions so you can review your rest alongside your night records.
iOS 1.5.15: choose 3 saved recordings per sleep session for full playback; Premium unlocks all. Android: check your installed version; this allowance’s public release is unverified.
Your entries stay on this page. This website does not upload or save them.
Clock times only: no adjustment for daylight-saving changes or travel between time zones.
How we calculated it
How the calculation works
Enter the time you plan to lie down, how long you want to sleep, and the minutes you expect to need to fall asleep.
The planned end time is the start time plus your selected sleep duration plus time to fall asleep. Set your own alarm; this website does not trigger an alarm or keep a timer running.
A nap plan is an estimate, not a guarantee of sleep or alertness. Choose a duration that works for your schedule. If naps make nighttime sleep harder, consider their timing and length. Persistent daytime sleepiness deserves professional advice.
A worked example
Start at 14:00, allow 10 minutes to fall asleep, and plan 20 minutes asleep: set your alarm for 14:30.
Common questions
Will the website set an alarm?
No. Copy the suggested time into your phone or another alarm. Closing this page does not affect a device alarm you set separately.
Are 20 or 90 minutes guaranteed to avoid grogginess?
No. Alertness after a nap varies. A selected duration does not predict sleep stages or guarantee how you will feel.
Can I track a nap in NiceSleep?
Yes. NiceSleep supports nap records. Start the session in the app and review the completed record afterward.