About Sleep Calculator

We created this tool to help you understand and optimize your sleep patterns using scientifically-backed methods. Sleep quality isn't just about duration—it's about timing your sleep with your natural circadian rhythms.

Why We Created This Tool

The Problem with Traditional Sleep Advice

Most sleep advice focuses only on getting 7-9 hours of sleep, but this overlooks a crucial factor: when you wake up matters just as much as how long you sleep. Waking up in the middle of a deep sleep cycle can leave you feeling groggy and tired, even after 8 hours of sleep.

The Science Behind Sleep Cycles

Our sleep follows natural 90-minute cycles, each containing different stages: light sleep, deep sleep, and REM sleep. The key to waking up refreshed is to wake up at the end of a complete cycle, when you're naturally transitioning from deep sleep to lighter sleep stages.

The 9-Pointer Sleep System

We developed our unique scoring system based on research showing that not all sleep hours are equal. The hours between 9 PM and midnight (Golden Hours) provide the most restorative sleep, while early morning hours offer diminishing returns. This helps you optimize not just when you wake up, but when you go to bed.

Our Mission

We believe everyone deserves to wake up feeling refreshed and energized. By combining sleep cycle science with practical timing tools, we help you take control of your sleep quality and improve your daily life.

Sleep Cycles

What are Sleep Cycles?

Sleep cycles are natural patterns that your body goes through during sleep. Each cycle lasts approximately 90 minutes and includes different stages of sleep.

Cycle Stages:

  • Stage 1: Light sleep (1-5 minutes)
  • Stage 2: Deeper sleep (10-25 minutes)
  • Stage 3: Deep sleep (20-40 minutes)
  • REM sleep: Dream sleep (10-60 minutes)

Why Wake Up at Cycle End?

Waking up at the end of a complete cycle helps you feel more refreshed and alert, as you're naturally transitioning from deep sleep to lighter sleep.

Recommended Sleep Duration:

Most adults need 4-6 complete cycles (6-9 hours) of sleep for optimal rest and recovery.

9-Pointer Sleep System

How It Works:

The 9-pointer system assigns different point values to sleep times based on their restorative benefits. Not all hours of sleep are equal!

Point Values:

  • 9 PM - 12 AM (Golden Hours): 2 points/hour
  • 12 AM - 3 AM: 1 point/hour
  • 3 AM - 6 AM: 0.5 points/hour
  • After 6 AM: 0.5 points/hour

Score Interpretation:

  • 8+ points: Excellent sleep quality
  • 6-7.9 points: Good sleep quality
  • 4-5.9 points: Fair sleep quality
  • Below 4 points: Poor sleep quality

Key Benefits:

  • • Higher scores indicate more restorative sleep
  • • Partial hours are calculated proportionally
  • • Helps optimize sleep timing for better recovery
  • • Aligns with natural circadian rhythms

Tips for Better Sleep

Sleep Hygiene:

  • • Maintain a consistent sleep schedule
  • • Create a dark, cool, quiet bedroom
  • • Avoid screens 1 hour before bed
  • • Limit caffeine after 2 PM

Using the Calculator:

  • • Plan sleep around your natural rhythm
  • • Aim for higher sleep scores when possible
  • • Account for 10-15 minutes to fall asleep
  • • Consider your daily schedule and commitments