Islamic Sleep Calculator
حاسبة النوم الإسلاميةAlign your sleep with the Prophetic routine — calculate optimal bedtimes, Tahajjud windows, and Qailulah nap times based on the Sunnah of Prophet Muhammad ﷺ.
Sunnah Sleep Calculator
Enter your prayer times or wake time to receive Sunnah-aligned sleep recommendations
⚡ Your Optimal Sleep Windows
Based on 90-minute sleep cycles + Sunnah timing
🌙 Your Sunnah Night Schedule
🌙 Recommended Bedtimes
To wake feeling refreshed at your chosen time
☀️ Your Qailulah (القيلولة) Schedule
The Prophetic midday nap — a Sunnah revived
The Prophet’s ﷺ Sleep Pattern
A timeless blueprint for restorative sleep and spiritual connection
Sleep Cycles & the Sunnah
Why the Prophet’s ﷺ sleep schedule aligns perfectly with modern neuroscience
🧠 The 90-Minute Sleep Cycle
Human sleep progresses through 90-minute cycles of NREM and REM sleep. Waking between cycles — rather than in the middle — results in feeling refreshed rather than groggy.
🌙 Optimal Sunnah Cycle Counts
The Prophet’s ﷺ routine of sleeping after Isha (~9:30 PM), rising for Tahajjud (~2 AM), and returning to sleep achieves an elegant 4–5 cycle night with minimal disruption.
| Cycles | Duration | Rating |
|---|---|---|
| 6 cycles | 9 hours | ⚠️ Too long |
| 5 cycles | 7.5 hours | ✅ Optimal |
| 4 cycles | 6 hours | 🌙 + Qailulah |
| 3 cycles | 4.5 hours | ⚠️ Minimum |
Reference: Neuroscience & Islamic Sleep Perspectives
Bedtime Duas (Adhkar al-Nawm)
Essential supplications from the Sunnah — recite nightly for protection, peace & reward
Nightly Sunnah Sleep Checklist
Track your bedtime Sunnah — each tick is an act of worship
Sleep in Islam: A Complete Sunnah-Based Guide
Sleep is one of the most profound signs mentioned in the Quran. Far from being mere biological downtime, Islamic tradition elevates sleep to a sacred act — a temporary death (wafat) during which the soul is returned to Allah ﷻ and released back at the appointed time of awakening.
The Prophetic Sleep Routine — Sunnah-Based Best Practices
The Prophet Muhammad ﷺ demonstrated a balanced, restorative sleep pattern that modern sleep scientists are only beginning to fully appreciate. His routine consisted of three integrated components: early night sleep (after Isha), voluntary night prayer (Tahajjud) in the last third of the night, and a midday nap (Qailulah).
1. Sleeping Early After Isha
The first principle of Islamic sleep hygiene is timing. The Prophet ﷺ disliked engaging in lengthy conversation or remaining awake unnecessarily after Isha prayer. This practice aligns with what modern chronobiology calls circadian rhythm entrainment — our biological clocks are designed to prepare for sleep at nightfall.
“The Prophet ﷺ used to dislike sleeping before Isha prayer and engaging in conversation after it.”
— Sahih al-Bukhari, 568 | Verify at Sunnah.com ↗2. Qiyam al-Layl — Waking in the Last Third
One of the most distinctive features of the Prophetic sleep model is the division of the night into two sleep periods, interrupted by Tahajjud prayer. Neuroscience confirms that stages 3–4 NREM (deep, physically restorative sleep) are largely complete within the first two-thirds of the night. Rising for Tahajjud during the final third therefore has minimal negative impact on physical recovery while delivering immense spiritual benefit.
3. Qailulah — The Prophetic Midday Nap
The Qailulah (القيلولة) is the Sunnah practice of resting briefly before or after Zuhr prayer. Research published by the National Institutes of Health confirms that a 20–30 minute midday nap during the post-lunch dip (12–3 PM) significantly improves alertness, memory consolidation, and mood — a finding the Prophet ﷺ communicated 1,400 years ago.
“Take a short nap, for the devils do not nap.”
— Sahih al-Jami, Albani 4431 | Referenced in IslamQA ↗The Sunnah Sleep Position: Right-Side Sleeping
The Prophet ﷺ consistently slept on his right side, placing his right hand beneath his right cheek. This position is not merely a cultural habit — a 2011 study on cardiac autonomic activity confirmed that the right lateral decubitus position maximises cardiac vagal (parasympathetic) activity, supporting heart rate variability and cardiovascular health. The Prophet’s ﷺ guidance, delivered 14 centuries before the science, has been validated by modern medicine.
“When you go to bed, perform ablution as you would for prayer, and lie on your right side.”
— Sahih Muslim, 2710 | Read at Sunnah.com ↗Sleep Deprivation & Islamic Ethics
Islam explicitly prohibits excessive sleep deprivation — even for worship. When a companion prayed through the entire night, the Prophet ﷺ admonished: “Your body has a right over you” (Sahih al-Bukhari, 1874). Imam Ibn al-Qayyim al-Jawziyyah in his Madarij al-Salikin warned that excessive sleep “deadens the heart, wastes time, and induces laziness” — but equally, sleep deprivation undermines the very worship it ostensibly serves.
The scholarly consensus, supported by published research in sleep medicine journals, recommends 7–8 hours of consolidated sleep for adults, supplemented by the Sunnah Qailulah. This is precisely what the Prophetic model achieves when implemented correctly.
Using This Islamic Sleep Calculator
This Sunnah-based sleep calculator uses the scientifically established 90-minute sleep cycle model, mapped onto Islamic prayer times, to generate personalised bedtime recommendations. By entering your Isha and Fajr prayer times, the calculator identifies bedtimes that allow you to complete full sleep cycles while preserving the Tahajjud window in the last third of the night.
For further Islamic guidance on sleep rulings, dua resources, and prayer time tools, explore our related Islamic calculators. For scholarly rulings on sleep-related matters, we recommend consulting IslamQA.info, IslamWeb.net, and DarulIftaa.com.
Frequently Asked Questions
Common questions about Islamic sleep practices and the Sunnah