Formulas & calculations reviewed by

Mr. Sanjay Dutt

Registered Pharmacist (D.Pharm) • UP Pharmacy Council • 7+ years experience

Clinical dosing ranges and calculation methodology verified against Mayo Clinic & NHS guidelines

Sleep Pattern Analyser

Advanced Sleep Analysis

Gain deeper insights into your sleep patterns and quality.

All your data is processed within your browser. Nothing is stored on any server. Please use Desktop Mode if on mobile devices/smaller screens for better experience.

Import Data
Manual Entry

For users with Oura, Fitbit, Apple Health, or our MedPlore sheet.

Your analysis will appear here.

Import a file or use manual entry to get started.

Add at least 3 nights of data to see your trends.

Add at least 3 nights of data to see your insights.

Add at least 3 nights of data to get answers to your sleep questions.

Your saved sleep data will appear here.

Sleep Pattern Analyser & Sleep Calculator

Advanced Sleep Pattern Analyser & Sleep Cycle Calculator

Your free, online app to measure sleep patterns and improve your sleep health.

A Request to Our Valued Users

This tool is built with a passion for helping people understand and improve their sleep. It is completely free, and your privacy is our top priority. All data is processed in your browser, and nothing is ever saved to a server.

If you find this tool helpful, we have a small request: please share it! Tell your friends, family, and acquaintances. Post about it on your social media, or if you have a blog or website, a mention would be greatly appreciated. Your support helps us reach more people and continue to improve the tool.

Have a feature request, found a bug, or want to provide feedback? Please don’t hesitate to reach out. We love hearing from you!

Unlock the Secrets of Your Sleep

Welcome to the most comprehensive, free sleep calculator online. This tool is more than just a sleep analyser; it’s a personal sleep coach designed to help you understand the intricacies of your sleep patterns. By transforming your raw sleep data into meaningful insights, this app empowers you to take control of your sleep health. Whether you’re curious about your sleep cycle stages or want to find the most effective sleep pattern for you, our tool provides the answers.

Your Personalised Questions Answered

Our tool doesn’t just give you data; it provides clear, personalised answers to your most pressing sleep questions. Based on your unique data, the “Q&A” tab will provide insights like these:

At what time should I sleep at night?

The tool analyses your average wake-up time over several nights and recommends an ideal bedtime to ensure you get the recommended 7-9 hours of sleep, helping you create a more effective sleep pattern.

How do I know what my sleep cycle is, and am I sleeping well?

The analyser provides a sleep score and a personalised sleep persona to give you a clear, at-a-glance understanding of your sleep quality. It also visualises your sleep stages in the “Latest Night” tab, allowing you to see your sleep cycle progression.

What is my sleep debt?

The tool calculates your cumulative sleep debt by comparing your actual sleep duration to the recommended amount. This helps you understand if you are building up a sleep deficit that could be impacting your daytime energy levels.

Is my sleep schedule consistent?

Using a sleep regularity score and by calculating the variability in your bedtime, the tool assesses the consistency of your sleep schedule, a key factor in sleep health.

Am I getting enough REM and Deep sleep?

The analyser breaks down your sleep into its core components—REM, Deep, and Light sleep—and compares your averages to the recommended percentages, helping you identify potential imbalances.

How Do You Calculate Total Sleep Time and Other Metrics?

Our sleep cycle calculator processes your data to provide a holistic view of your night. Here’s a glimpse into our methodology:

Total Sleep Time (TST): We calculate this by taking your total time in bed and subtracting the time it took you to fall asleep (sleep latency) and any time you spent awake during the night. This gives a precise measure of how much sleep you actually got.
Sleep Stages: The tool analyses data to estimate your time in each sleep stage: Light, Deep, and REM. This is crucial for understanding the quality of your rest. Our sleep calculator for REM sleep helps you see if you’re getting enough of this vital stage for cognitive function.
Sleep Cycles: We consider the concept of the 90-minute sleep cycle to assess the structure of your sleep. A typical night involves 4-6 full cycles. Our sleep cycle duration calculator helps you see how your night stacks up.
Sleep Score: A single, easy-to-understand score that summarises your night’s rest based on duration, efficiency, stage distribution, and restfulness.

A Powerful App to Measure Sleep Patterns

Detailed Sleep Stage Analysis

Go beyond simple duration metrics. Our sleep cycle stages calculator breaks down your night into Light, Deep, and REM sleep, helping you understand the architecture of your sleep.

Ideal Sleep Pattern Graph

Visualize your night with a comprehensive sleep cycle calculator chart (hypnogram). See how you progressed through different sleep stages and identify periods of wakefulness.

Personalized Sleep Persona

Discover if you are a ‘Sleep Warrior’, ‘Night Owl’, or ‘Consistent Captain’. Our analysis gives you a persona that reflects your long-term sleep habits, along with explanations.

Sleep Schedule Adjustment Calculator

Our trend analysis helps you understand your natural sleep-wake rhythm (chronotype) and identifies ‘social jetlag’, making it easier to adjust your schedule for optimal rest.

Cross-Platform Accessibility

As a web-based tool, our sleep calculator is accessible on any device, including as a sleep cycle calculator for iPhone (iOS) and Android through your browser.

Complete Privacy

Your sleep data is your own. All calculations are performed directly in your browser. We store nothing on our servers, ensuring your information remains 100% private.

How to Use This Sleep Cycle Calculator Free

Getting started is easy:

Import Data: If you use a supported device, select it from the list and upload your data file.
Manual Entry: No device? No problem. Use our manual entry form to input your sleep times and other relevant details.
Analyse: The tool will instantly process your data and generate your comprehensive sleep report across the ‘Latest Night’, ‘Trends’, ‘Insights’, and ‘Q&A’ tabs.

Analysing Your Sleep Pattern Calculator Results

Your results are designed to be intuitive and actionable:

Latest Night Tab: This is your daily sleep report card. It shows your sleep score, a nightly persona, and key stats like duration, efficiency, and time spent in each sleep stage. Use this to assess the quality of your previous night’s rest.
Trends Tab: This section helps you understand your habits over time. It displays your average sleep times, duration, regularity, and a heatmap of your bedtimes. This is key to understanding what normal sleep patterns look like for you.
Insights Tab: This is your personalized coaching section. It highlights your long-term sleep persona, identifies key areas for improvement, and provides a list of actionable recommendations to help you get the most effective sleep pattern.

Supported Devices & Data Import

This sleep calculator app works seamlessly with data from several popular sources:

Oura Ring
Fitbit
Apple Health (Exported via third-party apps)
MedPlore CSV Template (for manual tracking)

For best results, ensure your file contains at least 7 days of data. The tool is optimized to handle up to 50 nights of data to provide robust trend analysis.

How to Perfectly Fill MedPlore Sleep Data

If you don’t own a sleep tracker, our MedPlore CSV template is a powerful way to manually build your sleep diary. Here’s how to ensure your data is accurate:

Be Precise with Times: Record your bedtime (when you intend to sleep) and wake time (when you get out of bed) as accurately as possible using a 24-hour format (e.g., 22:30).
Estimate Sleep Latency: Make a reasonable guess of how long it took you to fall asleep.
Record Awakenings: Note how many times you remember waking up during the night.
Rate Your Sleep Quality: Use the 1-5 scale to give a subjective rating of how rested you feel upon waking.
Use the Notes Field: This is crucial. Log factors like caffeine or alcohol consumption, late meals, exercise, stress levels, or anything unusual about your day. This context helps you understand what influences your sleep quality.

Frequently Asked Questions (FAQs)

What are the normal sleep patterns for an adult?

A normal sleep pattern for a healthy adult typically involves 4-6 sleep cycles per night, with a total sleep duration of 7-9 hours. The distribution of sleep stages is generally around 50-60% Light Sleep, 15-20% Deep Sleep, and 20-25% REM Sleep. However, individual needs can vary.

Is this sleep cycle calculator for iPhone?

Yes! This is a web-based tool, which means it works on any device with a modern web browser, including iPhones, iPads (iOS), and Android devices. There is no need to download anything from the App Store.

Is this a truly free sleep cycle calculator?

Absolutely. All features of the Sleep Pattern Analyser are completely free to use. We believe everyone should have access to tools that help them improve their health.

Disclaimer

This tool is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. The analysis is based on general sleep science principles and may not apply to individuals with specific sleep disorders or medical conditions. Always consult a qualified healthcare professional with any questions about your health.