Find the best time to wake up from a nap
Frequently Asked Questions
A nap calculator helps you find the ideal wake-up time based on your nap start time and desired nap duration. It ensures you wake up at the optimal point to feel refreshed rather than groggy.
The best nap length depends on your goals. A 20-minute power nap boosts alertness without grogginess. A 45-minute nap includes light recovery sleep. A 90-minute nap completes a full sleep cycle including REM sleep.
20 minutes keeps you in light sleep, avoiding deep sleep grogginess. 45 minutes allows some restorative sleep. 90 minutes completes a full sleep cycle, so you wake during light sleep and feel refreshed.
If your nap crosses midnight, the calculator will show the wake-up time with a "Tomorrow" label so you know the date changes.
Yes! Each result includes a "Start Timer" button that opens the Timer tool pre-set to your nap duration so you can begin immediately.
Yes, the calculator uses your device's local timezone automatically. All times are calculated in your browser.
Absolutely! The 20-minute preset is specifically designed for power naps — short rests that boost alertness and performance without entering deep sleep.
Yes, the Nap Calculator is fully responsive and works on all devices including smartphones and tablets.