► References & Notes
- Calculation uses solar declination and hour-angle formulas based on your latitude, longitude, date and chosen method’s twilight angles.
- Fajr and Isha use twilight angles (e.g. MWL: 18°/17°, ISNA: 15°/15°, Egypt: 19.5°/17.5°).
- Asr uses the shadow-ratio formula: Standard = shadow equal to object height, Hanafi = double the object height.
- Dhuhr = local solar noon (sun crossing the meridian); Maghrib = sunset.
- Umm Al-Qura method sets Isha at a fixed 90 minutes after Maghrib instead of an angle.
- Extreme latitudes (near polar circles) may produce unreliable results with angle-based methods — verify locally in such regions.
- Times are for reference and planning; always confirm with your local mosque or authority where possible.
Calculate Prayer Times Calculator: Find Accurate Salah Timings Instantly
Zo Calculator’s prayer time tool lets you calculate prayer times for any city in the world in seconds, using your exact latitude, longitude, and preferred calculation method. Whether you’re a traveler, a student new to Islamic astronomy, or someone building a masjid schedule, this online prayer time calculator removes the guesswork from daily Salah timings. Just pick your location and method, and get all five daily prayers laid out clearly.
What This Calculator Tells You
This prayer time calculator generates the following for your selected date and location:
- Exact clock times for Fajr, Sunrise, Dhuhr, Asr, Maghrib, and Isha
- Results based on your chosen prayer time calculation method (ISNA, Muslim World League, Egyptian General Authority of Survey, and more)
- Adjustable Asr calculation (Standard/Shafi’i or Hanafi juristic method)
- Time zone and daylight-saving adjustments for your city
- A full monthly or daily breakdown you can use for planning, travel, or masjid scheduling
How the Calculator Works (The Formula & Logic)
Islamic prayer times calculation is based on the sun’s position relative to your location, not a fixed clock time. The tool uses your latitude, longitude, date, and a solar declination formula to figure out exactly when the sun crosses specific angles below or above the horizon.
In plain terms:
Prayer Time = Solar Noon ± Hour Angle (based on Sun’s angle below the horizon for that prayer)
Here’s how each prayer is actually derived:
- Dhuhr is calculated first, as the moment the sun crosses the local meridian (true solar noon), then a small safety margin is added.
- Fajr prayer time calculation works backward from Dhuhr, based on how many degrees the sun sits below the horizon before sunrise (commonly 15°–19.5°, depending on the method).
- Isha is calculated forward from Maghrib, using a similar twilight-angle formula, though some methods use a fixed number of minutes instead of an angle.
- Asr uses shadow-length ratios: Standard method uses a shadow length equal to an object’s height, while the Hanafi method uses double the object’s height.
- Maghrib is set at sunset, when the sun’s upper edge disappears below the horizon.
This is exactly why islamic prayer time calculation methods differences exist — each authority defines slightly different twilight angles for Fajr and Isha, which shifts the resulting times by a few minutes.
Standard Ratings & Classifications (Comparison Chart)
Below is a comparison of the most widely used prayer time calculation methods and their defining angles:
| Calculation Method | Fajr Angle | Isha Angle / Rule | Commonly Used In |
|---|---|---|---|
| Muslim World League (MWL) | 18° | 17° | Europe, Far East, parts of US |
| Islamic Society of North America (ISNA) | 15° | 15° | USA, Canada |
| Egyptian General Authority of Survey | 19.5° | 17.5° | Africa, Syria, Iraq, Lebanon, Malaysia |
| Umm Al-Qura University, Makkah | 18.5° | 90 minutes after Maghrib | Saudi Arabia |
| University of Islamic Sciences, Karachi | 18° | 18° | Pakistan, Bangladesh, India, Afghanistan |
| Institute of Geophysics, Tehran | 17.7° | 14° | Iran, some Shia communities |
The isna prayer time calculation method angles (15°/15°) tend to produce a slightly later Fajr and earlier Isha compared to the Egyptian General Authority of Survey prayer time calculation method, which uses wider angles suited to lower latitudes.
Step-by-Step Practical Example
Let’s walk through how to calculate prayer times manually for a sample city.
Example: Cairo, Egypt — using the Egyptian General Authority of Survey method (Fajr 19.5°, Isha 17.5°)
- Step 1 — Find solar noon: Using Cairo’s longitude and the date’s equation of time, solar noon works out to approximately 11:58 AM local time. This becomes the anchor point for Dhuhr.
- Step 2 — Calculate Fajr and Isha: Using the 19.5° angle, the sun reaches that depth below the horizon roughly 1 hour 32 minutes before sunrise, giving a Fajr time of around 4:12 AM. Applying the 17.5° Isha angle to sunset gives an Isha time of around 7:42 PM.
- Step 3 — Calculate Asr and Maghrib: Using the standard shadow-ratio formula, Asr falls at approximately 3:35 PM, while Maghrib matches sunset at roughly 6:15 PM.
The islamic prayer times calculator on ZoCalculator.com performs all of this instantly — no manual trigonometry required.
How to Use Zo Calculator’s Calculate Prayer Times Tool
- Enter your location — type your city name or allow location detection so the tool can pull your exact latitude and longitude.
- Select your calculation method — choose from ISNA, Muslim World League, Egyptian General Authority of Survey, or other supported methods.
- Choose your Asr setting — pick Standard (Shafi’i) or Hanafi, depending on your school of thought.
- Pick a date — view today’s timings or check a future date for travel planning.
- Read your results — the tool instantly displays Fajr, Sunrise, Dhuhr, Asr, Maghrib, and Isha in your local time zone.
Practical Applications and Real-World Uses
- Daily worship planning for individuals and families who want accurate, location-specific Salah times
- Masjid and Islamic center scheduling, where consistent monthly prayer timetables are needed
- Travelers and expatriates who need to recalculate prayer time calculation instantly when changing cities or countries
- Islamic app and website developers referencing standardized calculation methods for their own tools
- Students of Islamic astronomy (Ilm al-Falak) learning how are islamic prayer times calculated using solar angles
- Ramadan planning, where precise Fajr and Maghrib times directly affect Suhoor and Iftar timing
Important Notes & Technical Limitations
- Results are based on astronomical calculation and standard method angles; local mosque announcements may vary slightly and should take precedence where available.
- Extreme latitudes (such as the islamic prayer times calculation method for Canary Islands or regions near the poles) may require adjusted or alternative methods since standard sun-angle formulas can become unreliable in high-latitude summer/winter conditions.
- The tool assumes a flat, unobstructed horizon; local elevation, buildings, or mountains are not factored in.
- This calculator is intended for general reference and planning purposes and is not a substitute for guidance from a local religious authority or scholar.
Helpful References & Sources
- IslamicFinder.org — reference data on global prayer time calculation methods
- Wikipedia.org — background on Salah, solar time, and Islamic astronomy
- Official Islamic Society of North America (ISNA.net) — details on the ISNA calculation standard
🙋 Frequently Asked Questions (FAQs)
How do I calculate prayer times for my city?
Enter your city or allow location access on ZoCalculator.com’s prayer time calculator, choose your preferred calculation method, and the tool instantly generates all five daily prayer times based on your coordinates and date.
What is the most accurate prayer time calculation method?
There isn’t a single “most accurate” method — each one (ISNA, MWL, Egyptian Survey, Umm Al-Qura, Karachi) uses angles suited to different regions. Most users simply follow whichever method their local mosque or Islamic authority uses.
How are Islamic prayer times calculated scientifically?
Prayer times are calculated using the sun’s angle relative to the horizon at your specific latitude and longitude, combined with the date’s solar declination. Fajr and Isha use twilight angles, Dhuhr uses solar noon, Asr uses shadow-length ratios, and Maghrib matches sunset.
What is the difference between ISNA and Muslim World League methods?
The ISNA prayer time calculation method uses 15° for both Fajr and Isha, while the Muslim World League method uses 18° for Fajr and 17° for Isha. This typically makes ISNA’s Fajr slightly later and Isha slightly earlier than MWL’s.
Why do prayer times differ between calculation methods?
Islamic prayer time calculation methods differences come from how each authority defines the twilight angle for Fajr and Isha, since there’s no single universally agreed-upon angle in classical texts. This can shift Fajr and Isha by 10-30 minutes depending on the method chosen.
What angle does the Egyptian General Authority of Survey use?
The Egyptian General Authority of Survey prayer time calculation method uses a 19.5° angle for Fajr and 17.5° for Isha, and is commonly used across Egypt, parts of Africa, Syria, Iraq, and Lebanon.
How is Fajr prayer time calculated?
Fajr prayer time calculation works backward from sunrise, marking the moment the sun reaches a set angle (typically 15°-19.5°, depending on method) below the horizon, known as the start of true dawn (subh sadiq).
What calculation method should I use in the Canary Islands or high latitudes?
Islamic prayer times calculation method for Canary Islands and similarly high-latitude regions often requires an adjusted or “one-seventh of night” method, since standard twilight angles can fail to produce reliable times during certain seasons.
Does the Asr calculation method affect prayer times?
Yes — the Standard (Shafi’i) method calculates Asr when an object’s shadow equals its height, while the Hanafi method waits until the shadow is double the object’s height, making Hanafi Asr times roughly 30-60 minutes later.
Can I use an online prayer time calculator instead of a printed timetable?
Yes, an online prayer time calculator like Zo Calculator’s tool is generally more flexible than a printed timetable since it adjusts instantly for your exact location, date, and preferred calculation method rather than relying on a single fixed regional schedule.