Coffee vs. Sleep Calculator

Should you take a nap or drink coffee? Find out which will give you the best alertness boost

Coffee or Nap Decision Tool
Answer a few questions to get a personalized recommendation for fighting fatigue

The time of day affects whether coffee or a nap is more effective

How many hours have you been awake?

1 - Wide Awake5 - Moderate10 - Extremely Sleepy
About This Calculator

When you're feeling tired, should you reach for coffee or take a quick nap? This calculator helps you decide based on scientific research about caffeine, sleep, and circadian rhythms.

The recommendation considers factors like your current sleepiness level, time of day, how long you've been awake, and your personal preferences.

What is a Coffee Nap?

A coffee nap is when you drink coffee and then immediately take a 20-minute nap. The caffeine takes about 20 minutes to kick in, so you wake up just as it starts working, giving you a double boost of alertness.

Quick Facts
  • ☕Caffeine has a half-life of 5-6 hours in most adults.
  • 😴A 10-20 minute nap improves alertness without causing sleep inertia (grogginess).
  • 🕒Most people experience a natural alertness dip between 1-3 PM, making it an ideal nap time.