shutter_speed Nap Calculator

Pick a nap. We'll handle the math.

Select a duration — timer starts automatically with the right wake-up time.

26%

Alertness Boost

20m

Power Nap

90m

Full Cycle

1–3 PM

Best Window

bolt

Power Nap

20 min

Quick recharge. Avoids deep sleep — wake up sharp with zero grogginess.

Wake up at

2:45 PM

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Best

psychology

Refresh Nap

40 min

Memory boost and creative problem-solving. Great after a heavy lunch.

Wake up at

3:05 PM

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bedtime

Full Cycle

90 min

Complete REM recovery. Full sleep cycle with minimal sleep inertia.

Wake up at

3:55 PM

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local_cafe

Nappuccino Trick

Drink a coffee right before your 20-min nap. Caffeine takes ~20 min to kick in — you'll wake up with a double boost.

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Sleep Calculator

Find your ideal bedtime or wake-up time

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headphones

Sleep Sounds

Ambient music to help you drift off

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*Alertness data: Rosekind et al., Journal of Sleep Research, 1995

FAQ

How long should a power nap be? expand_more

A power nap should be 20 minutes. This keeps you in light sleep stages (N1 and N2) so you wake up sharp and alert without any grogginess. Going longer than 30 minutes risks entering deep sleep, which makes it much harder to wake up feeling refreshed.

When is the best time to nap? expand_more

The ideal nap window is between 1:00 PM and 3:00 PM. This aligns with your body's natural post-lunch alertness dip (a circadian rhythm feature, not just from eating). Napping after 3 PM can interfere with your nighttime sleep.