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March 13, 2025

Perfect Sleep Duration: Finding Your Optimal Hours of Rest

Medically reviewed by: 

Dr. Shiyan Ooi

School of Medical Sciences, University of Manchester

Introduction

How much sleep do you really need? While the common recommendation is 7-9 hours per night, the ideal sleep duration varies from person to person based on age, lifestyle, and individual sleep needs.

In this guide, we'll explore how to determine your perfect sleep duration, the risks of too little or too much sleep, and strategies to improve your sleep quality for optimal health and performance.

Understanding Sleep Needs by Age

Research from the National Sleep Foundation provides general sleep duration recommendations based on age:

  • Newborns (0-3 months): 14-17 hours
  • Infants (4-12 months): 12-16 hours (including naps)
  • Toddlers (1-2 years): 11-14 hours
  • Preschoolers (3-5 years): 10-13 hours
  • School-age children (6-13 years): 9-12 hours
  • Teenagers (14-17 years): 8-10 hours
  • Young Adults & Adults (18-64 years): 7-9 hours
  • Older Adults (65+ years): 7-8 hours

Read more about sleep duration recommendations.

Signs You're Not Getting Enough Sleep

Chronic sleep deprivation can lead to a variety of health issues, including weakened immunity, cognitive decline, and increased risk of heart disease. Signs that you may not be getting enough sleep include:

  • Feeling groggy or drowsy during the day
  • Needing caffeine or naps to stay alert
  • Struggling to focus or retain information
  • Increased irritability and mood swings
  • Cravings for sugary or high-carb foods

Can You Sleep Too Much?

While getting too little sleep is a well-known issue, oversleeping can also have negative effects. Studies suggest that consistently sleeping more than 9-10 hours per night may be linked to:

  • Increased risk of depression
  • Higher inflammation levels
  • Greater likelihood of obesity and metabolic issues
  • Increased risk of cardiovascular disease

Learn more about the health risks of oversleeping.

How to Find Your Optimal Sleep Duration

Since individual sleep needs vary, determining your ideal sleep duration requires some self-experimentation. Here's how:

1. Track Your Sleep for Two Weeks

Go to bed and wake up without an alarm for two weeks, noting how many hours of sleep leave you feeling fully rested.

2. Pay Attention to Daytime Performance

If you feel alert and focused throughout the day without relying on caffeine, you've likely found your ideal sleep duration.

3. Adjust Based on Lifestyle and Activity Levels

Athletes, students, and individuals with high mental workloads may need more sleep for recovery and peak performance.

Improving Sleep Quality

1. Maintain a Consistent Sleep Schedule

Going to bed and waking up at the same time every day, even on weekends, helps regulate your body's internal clock.

2. Optimize Your Sleep Environment

Keep your bedroom cool, dark, and quiet. Invest in a high-quality mattress and pillows for better comfort.

3. Limit Blue Light Exposure

Avoid screens at least an hour before bedtime to prevent melatonin suppression.

4. Manage Stress and Anxiety

Try relaxation techniques such as meditation, deep breathing, or Cognitive Behavioral Therapy for Insomnia (CBT-I).

Explore CBT-I for sleep.

Better Sleep with Sleep Reset

At Sleep Reset, we provide expert-designed, non-medication solutions to help you find your ideal sleep duration and improve sleep quality. Our program incorporates CBT-I, personalized sleep tracking, and expert coaching.

Wondering if you're getting enough sleep? Take our sleep quiz to discover the best strategies for improving your sleep naturally.

Conclusion

While 7-9 hours of sleep is the general recommendation, your ideal sleep duration depends on individual factors like age, activity level, and overall health. Prioritizing sleep consistency and quality will help you wake up feeling truly refreshed.

For expert guidance, Sleep Reset offers personalized solutions to help you sleep better and optimize your health.

Dr. Shiyan Ooi

Dr. Shiyan Ooi is a medical doctor with over a decade of experience treating patients with chronic conditions. She graduated from the University of Manchester with a Bachelor of Medicine and Surgery (MBChB UK) and spent several years working at the National Health Service (NHS) in the United Kingdom, several Singapore government hospitals, and private functional medicine hospitals. Dr. Ooi specializes in root cause analysis, addressing hormonal, gut health, and lifestyle factors to treat chronic conditions. Drawing from her own experiences, she is dedicated to empowering others to optimize their health. She loves traveling, exploring nature, and spending quality time with family and friends.