Tahajjud Prayer Time Calculator
Calculate the optimal time for Tahajjud prayer from Isha and Fajr times. Enter values for instant results with step-by-step formulas.
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer
Tahajjud Prayer Time Calculator
Calculator
Adjust values & calculateEnter your values below. Every result is computed in your browser — no data is sent to any server.
Formula: Night Duration = Fajr Time - Isha Time; Each Third = Night Duration / 3
Worked example — Last third: 2:10 AM - 5:00 AM | Wake up: 1:55 AM | Available: 2h 50m for prayer
Formula
Night Duration = Fajr Time - Isha Time; Each Third = Night Duration / 3
The night is divided into three equal portions from Isha to Fajr. The last third, which begins at Isha + (2/3 x Night Duration), is the most recommended time for Tahajjud prayer. A suggested wake-up time is calculated 15 minutes before the last third begins.
Worked Examples
Example 1: Standard Night Prayer Timing
Problem:Isha is at 8:30 PM and Fajr is at 5:00 AM. Calculate the last third of the night for optimal Tahajjud prayer.
Solution:Night duration: 5:00 AM - 8:30 PM = 8 hours 30 minutes = 510 minutes Each third: 510 / 3 = 170 minutes = 2 hours 50 minutes First third: 8:30 PM - 11:20 PM Second third: 11:20 PM - 2:10 AM Last third: 2:10 AM - 5:00 AM Suggested wake-up: 1:55 AM (15 min before last third)
Result:Last third: 2:10 AM - 5:00 AM | Wake up: 1:55 AM | Available: 2h 50m for prayer
Example 2: Short Summer Night
Problem:During summer in London, Isha is at 10:30 PM and Fajr is at 2:30 AM. When should Tahajjud be prayed?
Solution:Night duration: 2:30 AM - 10:30 PM = 4 hours = 240 minutes Each third: 240 / 3 = 80 minutes = 1 hour 20 minutes First third: 10:30 PM - 11:50 PM Second third: 11:50 PM - 1:10 AM Last third: 1:10 AM - 2:30 AM Suggested wake-up: 12:55 AM
Result:Last third: 1:10 AM - 2:30 AM | Only 1h 20m available | Pray at least 2-4 rakaat
Frequently Asked Questions
What is Tahajjud prayer and what is its significance in Islam?
Tahajjud is a voluntary (nafl) night prayer performed after sleeping some portion of the night and waking before Fajr. It holds an exceptionally high spiritual status in Islam, mentioned specifically in the Quran in Surah Al-Isra (17:79) where Allah instructs the Prophet Muhammad (peace be upon him) to pray during part of the night as an additional devotion. The Prophet described Tahajjud as the best prayer after the obligatory prayers, and it is considered one of the most effective means of drawing closer to Allah. Night prayer was a consistent practice of the Prophet and his companions, and it is during these quiet hours that supplications are believed to be most readily accepted. The spiritual benefits include increased taqwa (God-consciousness), forgiveness of sins, and strength of faith.
What is the best time to pray Tahajjud?
The most virtuous time for Tahajjud prayer is during the last third of the night, based on the hadith in Sahih al-Bukhari and Sahih Muslim where the Prophet Muhammad (peace be upon him) said that Allah descends to the lowest heaven during the last third of every night and asks if there is anyone calling upon Him, seeking His forgiveness, or asking of Him so that He may respond. To calculate the last third, determine the total night duration from Isha to Fajr, divide by three, and the final segment is the optimal window. For example, if Isha is at 8:30 PM and Fajr is at 5:00 AM, the night is 8.5 hours, each third is about 2 hours 50 minutes, and the last third begins at approximately 2:10 AM. If waking for the last third is difficult, praying in any part of the night after sleeping is still highly rewarded.
How many rakaat should be prayed for Tahajjud?
The minimum Tahajjud prayer is two rakaat, and there is no strict maximum, though the Prophet Muhammad (peace be upon him) most commonly prayed eight or eleven rakaat including Witr. The hadith of Aisha (may Allah be pleased with her) reports that the Prophet would pray eleven rakaat at night, performing them in sets of two and concluding with a single Witr rakah. Some scholars permit up to twelve or thirteen rakaat based on various hadith narrations. The prayer is performed in pairs (two rakaat at a time with salam), and it is recommended to conclude the night prayer with Witr if it has not already been prayed after Isha. Quality is more important than quantity, so it is better to pray fewer rakaat with deep concentration and longer recitation than to rush through many rakaat.
How do I divide the night into thirds for Tahajjud calculation?
Dividing the night into thirds is a straightforward calculation once you know the Isha and Fajr times for your location. First, determine the total night duration in minutes by calculating the time from Isha prayer to Fajr prayer. Then divide this total by three to get the duration of each third. The first third begins at Isha time, the second third begins one-third of the way through the night, and the last third begins two-thirds of the way through. For example, with Isha at 9:00 PM and Fajr at 4:30 AM, the night is 7 hours 30 minutes (450 minutes). Each third is 150 minutes (2 hours 30 minutes). First third: 9:00 PM to 11:30 PM. Second third: 11:30 PM to 2:00 AM. Last third: 2:00 AM to 4:30 AM.
What should I recite during Tahajjud prayer?
Tahajjud prayer follows the same basic structure as any nafl prayer but offers special opportunity for longer recitation and deeper contemplation. After reciting Surah Al-Fatiha in each rakah, it is recommended to recite longer portions of the Quran, as the Prophet Muhammad (peace be upon him) would sometimes recite several chapters in a single rakah during night prayers. Particularly recommended surahs include Al-Baqarah, Al-Imran, Yasin, Al-Mulk, and Al-Waqi-ah, though any portion of the Quran is appropriate. During the prostration (sujud), it is especially recommended to make extended personal supplications, as this position is described as the closest a servant can be to Allah. The dua of Tahajjud is considered among the most powerful times for personal supplication.
What is the difference between Tahajjud and Qiyam al-Layl?
While the terms are often used interchangeably in common parlance, there is a technical distinction between Tahajjud and Qiyam al-Layl in Islamic jurisprudence. Qiyam al-Layl literally means standing in the night and refers broadly to any act of worship performed during the night hours, including prayer, Quran recitation, dhikr (remembrance of Allah), and reflection. Tahajjud specifically refers to prayer performed after having slept some portion of the night and then waking up for worship. This element of sleeping first and then rising is what distinguishes Tahajjud from other night prayers like Taraweeh, which are performed before sleeping. Some scholars consider Tahajjud a specific subset of Qiyam al-Layl, while others use the terms synonymously. Both carry tremendous spiritual reward and are highly encouraged practices.
Can I pray Tahajjud if I did not sleep first?
The majority of Islamic scholars hold that sleeping before Tahajjud is a recommended practice (mustahabb) rather than an absolute requirement (wajib) for the prayer validity. The word Tahajjud itself is derived from the Arabic root meaning to wake from sleep, which linguistically implies prior sleep. However, many scholars including those of the Hanafi school accept that praying voluntary night prayers after Isha without having slept first is still valid and rewarding, though it would technically be categorized as general Qiyam al-Layl rather than Tahajjud in the strict sense. The practical advice from scholars is that if you fear you will not wake up for the last third of the night, it is better to pray before sleeping than to miss the opportunity entirely, as the reward of night prayer should not be foregone due to technicalities.
How does the Tahajjud time window change throughout the year?
The Tahajjud time window varies significantly throughout the year because it depends directly on the Isha and Fajr times, which are determined by the sun position relative to the horizon. During summer months at higher latitudes, nights are shorter, which compresses the Tahajjud window considerably. In cities like London or Stockholm during mid-summer, the period between Isha and Fajr can be as short as 4 to 6 hours, making the last third only 1.5 to 2 hours. During winter at the same latitudes, nights extend to 14 to 16 hours, providing a generous last third of 4.5 to 5 hours for Tahajjud. Near the equator, the variation is minimal, with fairly consistent night lengths of approximately 11 to 12 hours throughout the year. This seasonal variation is an important practical consideration for planning.
What are the physical and mental health benefits of waking for Tahajjud?
Beyond the spiritual rewards, research in sleep science and psychology has identified several potential health benefits associated with the practice of rising for pre-dawn prayer. Biphasic sleep patterns, where the night is divided into two sleep segments with a wakeful period in between, were historically common before artificial lighting and may align more naturally with human circadian biology. The quiet contemplative period of Tahajjud can function similarly to meditation, reducing stress hormones, lowering blood pressure, and promoting mental clarity. The discipline of maintaining a consistent wake-up time, even if early, helps regulate circadian rhythms and can improve overall sleep quality. The pre-dawn meal (suhoor during Ramadan or a light snack before Tahajjud) prevents extended fasting periods and maintains blood sugar levels throughout the night.
What tips help in consistently waking up for Tahajjud prayer?
Establishing a consistent Tahajjud practice requires both spiritual intention and practical strategies. Begin by making sincere dua (supplication) before sleeping that Allah helps you wake for night prayer, as the Prophet emphasized the importance of intention. Set multiple alarms placed away from your bed so you must physically rise to turn them off. Go to sleep early, ideally soon after Isha prayer, following the Prophetic practice that maximizes sleep before the last third of the night. Avoid heavy meals close to bedtime and reduce screen time in the evening. Start gradually with just two rakaat a few nights per week rather than attempting lengthy prayers every night from the beginning. Having an accountability partner, such as a spouse or friend who also prays Tahajjud, creates mutual encouragement. Place your prayer mat and clean clothes ready before sleeping to remove barriers upon waking.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
Related Calculators
🧮Prayer Time Calculator
Calculate prayer time with inputs, formulas, and instant results.
🧮Sadaqah Impact Calculator
Calculate the potential impact of regular sadaqah donations over time with compound growth.
🧮Kabul to Province Travel Cost Calculator
Calculate travel costs from Kabul to any Afghan province by road with fuel and time.
🧮Islamic Mortgage Calculator — Murabaha & Ijara
Calculate islamic mortgage with inputs, formulas, and instant results.
🧮Islamic Inheritance Calculator
Calculate islamic inheritance with inputs, formulas, and instant results.
🧮Islamic Date Calculator
Calculate days between two Hijri dates or convert Hijri date ranges to Gregorian.
🧮Islamic Will Calculator
Calculate Islamic inheritance shares (faraid) for all heirs according to Quran and Sunnah.
🧮Islamic Months Calculator
Convert between Hijri month names, numbers, and corresponding Gregorian date ranges.