Prayer Time Calculation

Calculate accurate Islamic prayer times (Salat times) based on your geographical location and date.

Prayer Time Calculator

Daily Prayer Time Chart

Prayer times for at Location:

Prayer Times Summary

Prayer Times Data (Local Time)

Prayer	Time	Calculation Method	Asr Madhab
Fajr	–:–
Sunrise	–:–
Dhuhr	–:–
Asr	–:–
Maghrib	–:–
Sunset	–:–
Isha	–:–

What is Prayer Time Calculation?

Prayer time calculation, in the context of Islam, refers to the process of determining the precise timings for the five daily obligatory prayers (Salat): Fajr (dawn), Dhuhr (noon), Asr (afternoon), Maghrib (sunset), and Isha (night). These times are not fixed globally but depend on the sun’s position relative to a specific geographical location on Earth. Accurate prayer time calculation is crucial for Muslims worldwide to fulfill their religious obligations correctly.

This calculator is designed for Muslims who need to find the exact Salat times for their location, especially in areas where traditional mosques or Islamic centers might not be readily available, or when traveling. It helps users determine these critical prayer windows based on scientifically derived astronomical data and established Islamic jurisprudence.

A common misunderstanding involves the fixed nature of prayer times. Many assume they are the same everywhere or follow a simple daily schedule. However, prayer times are dynamic, changing daily due to the Earth’s rotation and its orbit around the sun. Furthermore, different Islamic scholarly bodies have developed various calculation methods, leading to slight variations in timings, particularly for Fajr, Maghrib, and Asr. Our tool aims to provide flexibility by allowing users to select their preferred calculation method and understand the nuances involved.

Prayer Time Calculation Formula and Explanation

The calculation of Islamic prayer times is rooted in astronomical principles and Islamic scholarly interpretations. While the exact mathematical implementation can be complex, the core idea is to determine the sun’s position in the sky relative to the horizon at a specific latitude and longitude on a given date. The primary variable is the local apparent solar time, adjusted by various factors.

The general approach involves calculating the Sun’s transit time (local noon) and then using specific angles below the horizon to define the start and end times of Fajr and Isha, and the start time of Maghrib. Asr time is determined based on the sun’s angle or shadow length, with different schools of thought (Madhabs) using different angles.

Key Astronomical Factors:

• Solar Declination (δ): The angle between the sun’s rays and the plane of the Earth’s equator. It varies throughout the year due to Earth’s axial tilt.
• Equation of Time (EoT): The difference between apparent solar time (time by a sundial) and mean solar time (time by a clock). This accounts for Earth’s elliptical orbit and axial tilt.
• Hour Angle (HA): The angular distance on the celestial sphere, measured westward along the celestial equator from the local meridian to the hour circle of an object. This determines the time relative to local noon.
• Latitude (φ): The angular distance, north or south of the equator, of a location on the Earth’s surface.

Simplified Calculation Steps:

1. Calculate the Julian Day (JD) for the given date.
2. Calculate the Sun’s mean anomaly, mean longitude, and ecliptic longitude.
3. Determine the Sun’s declination (δ) and the Equation of Time (EoT).
4. Calculate Local Noon (Transit Time): This is typically 12:00 PM Mean Solar Time, adjusted by longitude and EoT.
5. Determine Prayer Times based on specific angles (defined by calculation methods):
   • Fajr: Sun angle typically between 10° and 19° below the horizon before sunrise.
   • Sunrise: Sun angle at 0° (geometric horizon).
   • Dhuhr: Starts when the sun crosses the local meridian (Local Noon).
   • Asr: Starts when the sun’s angle or shadow length reaches a specific point. The most common are 1 shadow length (Shafii, Maliki, Hanbali) or 2 shadow lengths (Hanafi).
   • Maghrib: Starts when the sun sets (geometric horizon).
   • Isha: Sun angle typically between 15° and 19° below the horizon after sunset.
6. Adjust calculated times for the local timezone offset.

Variables Table:

Variables Used in Prayer Time Calculation

Variable	Meaning	Unit	Typical Range
Latitude (φ)	Angular distance north/south of the equator	Degrees (-90° to +90°)	-90° to +90°
Longitude (λ)	Angular distance east/west of the prime meridian	Degrees (-180° to +180°)	-180° to +180°
Date	Calendar date for calculation	Gregorian Date	N/A
Timezone Offset	Difference from UTC	Hours	-12 to +14
Fajr Angle	Sun depression angle for Fajr	Degrees	10° – 19° (Method Dependent)
Isha Angle	Sun depression angle for Isha	Degrees	15° – 19° (Method Dependent)
Asr Shadow Length	Ratio of shadow length to object height	Unitless Ratio	1 (Shafii) or 2 (Hanafi)
Calculation Method	Algorithm used for angles	Method Name	ISNA, MWL, Makkah, etc.

Practical Examples

Let’s illustrate with a couple of realistic scenarios:

Example 1: Prayer Times in Los Angeles, USA

• Inputs:
  • Latitude: 34.0522° N
  • Longitude: 118.2437° W
  • Date: October 26, 2023
  • Timezone Offset: -7:00 (PDT in October)
  • Calculation Method: ISNA
  • Asr Madhab: Shafii
• Expected Results (Approximate Local Times):
  • Fajr: 5:05 AM
  • Sunrise: 6:30 AM
  • Dhuhr: 12:00 PM
  • Asr: 3:45 PM
  • Maghrib: 5:30 PM
  • Sunset: 5:30 PM
  • Isha: 7:00 PM
• Explanation: Based on the latitude and longitude, the sun’s path is calculated for October 26th. The ISNA method sets specific angles for Fajr and Isha, resulting in these times. The timezone offset adjusts the UTC calculation to local Pacific Daylight Time. The Shafii Asr method uses a standard shadow calculation.

Example 2: Prayer Times in London, UK

• Inputs:
  • Latitude: 51.5074° N
  • Longitude: 0.1278° W
  • Date: December 25, 2023
  • Timezone Offset: +0:00 (GMT in December)
  • Calculation Method: MWL
  • Asr Madhab: Hanafi
• Expected Results (Approximate Local Times):
  • Fajr: 5:55 AM
  • Sunrise: 7:40 AM
  • Dhuhr: 11:55 AM
  • Asr: 3:00 PM
  • Maghrib: 3:50 PM
  • Sunset: 3:50 PM
  • Isha: 5:30 PM
• Explanation: For London in winter, the days are short. The MWL method uses slightly different angles than ISNA, potentially affecting Fajr and Isha. The timezone is UTC (0). The Hanafi Asr method, using a shadow length of 2, often results in an earlier Asr time compared to the Shafii method.

Impact of Changing Units/Methods:

If the Asr Madhab in Example 2 were changed from Hanafi to Shafii, the Asr time would likely be calculated later in the afternoon, perhaps around 3:30 PM instead of 3:00 PM, due to the different shadow calculation method. Similarly, changing the Calculation Method (e.g., from MWL to ISNA) can slightly alter the Fajr and Isha times, especially at higher latitudes or during seasons with short nights.

How to Use This Prayer Time Calculator

1. Enter Latitude and Longitude: Find your location’s latitude and longitude using a map service (like Google Maps) or GPS device. Input these values in decimal degrees. Remember North and East are positive, South and West are negative.
2. Select Timezone Offset: Choose the correct offset of your local time from Coordinated Universal Time (UTC). If unsure, search online for “[Your City] UTC offset”.
3. Choose the Date: Select the specific date for which you need the prayer times.
4. Select Calculation Method: Consult your local mosque or Islamic authority to determine which calculation method they follow (e.g., ISNA, MWL, Makkah).
5. Choose Asr Madhab: Select the juristic school of thought (Madhab) your community follows for calculating the Asr prayer time. ‘Shafii’ is standard for most, while ‘Hanafi’ is specific to followers of Imam Abu Hanifa.
6. Click ‘Calculate Times’: The calculator will process your inputs and display the estimated prayer times (Fajr, Sunrise, Dhuhr, Asr, Maghrib, Sunset, Isha) in your local time.
7. Interpret Results: The displayed times are the approximate windows for each prayer. It’s recommended to perform prayers within their designated times.
8. Use Copy Results: Click ‘Copy Results’ to save the calculated times and settings for easy sharing or reference.

Selecting Correct Units: In this calculator, the primary inputs (Latitude, Longitude) are in degrees. The Timezone Offset is in hours. The date is in the standard calendar format. The calculation method and Asr madhab are selected from predefined options. There are no unit conversions needed for these inputs, as they are specific values required by the astronomical formulas.

Key Factors That Affect Prayer Times

Several factors intricately influence the calculation of Islamic prayer times, ensuring their accuracy and relevance to the sun’s celestial movements:

1. Latitude: This is arguably the most significant factor after the date. Locations closer to the equator experience less variation in day/night length throughout the year compared to locations at higher latitudes. At extreme latitudes (near the poles), days and nights can become very long, leading to unique prayer time challenges, sometimes requiring methods that estimate times based on proximity to the nearest latitude with a normal day/night cycle.
2. Longitude: While latitude dictates the sun’s height and path, longitude determines the local apparent solar time. Different longitudes experience sunrise, noon, and sunset at different clock times. Timezone offsets are applied to standardize this to clock time.
3. Date (Time of Year): The Earth’s axial tilt causes the sun’s declination to change throughout the year. This directly impacts the length of daylight and the sun’s maximum altitude, thus altering all prayer times daily.
4. Calculation Method: As discussed, different Islamic organizations and scholars have proposed specific angles (degrees below the horizon) for Fajr and Isha, and different criteria for Asr. These methods are essential interpretations of Islamic texts and astronomical observations.
5. Asr Juristic School (Madhab): The interpretation of when the time for Asr prayer begins varies between the Hanafi school and the majority of other schools (Shafii, Maliki, Hanbali). The Hanafi method typically results in a later Asr time.
6. Daylight Saving Time (DST): In regions that observe DST, the local clock time shifts by an hour. The timezone offset selected should reflect the *current* time relative to UTC, whether DST is active or not. This calculator assumes the user selects the correct current offset.
7. Altitude: While not typically included in basic calculators, a location’s altitude can slightly affect the visibility of the horizon and thus the perceived sunrise/sunset times. This effect is usually minimal for ground-level calculations.
8. Circumpolar Regions: In areas north of the Arctic Circle or south of the Antarctic Circle, the sun may not set in summer (polar day) or rise in winter (polar night). Special calculation methods are needed here, often extrapolating from lower latitudes or using twilight definitions.

Frequently Asked Questions (FAQ)

Q1: How accurate are these prayer times?

A: The accuracy depends on the precision of the input data (latitude, longitude, date) and the chosen calculation method and Asr madhab. This calculator uses standard astronomical formulas and widely accepted methods. For extremely precise timings, consult local religious authorities or specialized astronomical software.

Q2: My prayer times seem different from another app/website. Why?

A: This is usually due to using a different Calculation Method or Asr Madhab. Some regions might also use slightly different timezone offsets or have specific local interpretations. Always check which method is recommended by your local mosque.

Q3: What does the “Sunrise” or “Sunset” time represent?

A: These typically refer to the geometric horizon times. Sunrise is when the upper limb of the sun appears on the horizon, and sunset is when it disappears. These are important reference points for Fajr and Maghrib.

Q4: How do I find my Latitude and Longitude?

A: You can use online tools like Google Maps (right-click on your location) or smartphone GPS apps. Ensure you record the values in decimal degrees (e.g., 40.7128 for latitude, -74.0060 for longitude).

Q5: What is the difference between Shafii and Hanafi Asr?

A: The majority of Islamic jurisprudence (Shafii, Maliki, Hanbali) holds that Asr time begins when an object’s shadow is equal to its length plus its own shadow at noon. The Hanafi school holds that it begins when the shadow is twice the object’s length plus its own shadow. This generally leads to the Hanafi Asr time being calculated later in the afternoon.

Q6: What if I live near the North or South Pole?

A: In polar regions, the sun may not set in summer or rise in winter. Standard calculations might produce invalid times. Specialized methods, often based on twilight duration or a fixed angle, are used in these ‘circumpolar’ zones. This calculator may provide less reliable results at extreme latitudes (above 66.5° N/S).

Q7: Can I use this calculator for past or future dates?

A: Yes, you can input any valid date. The underlying astronomical formulas will calculate the sun’s position for that specific day.

Q8: Is there a recommended time to pray within the calculated window?

A: It is generally best to pray at the beginning of the Dhuhr, Asr, Maghrib, and Isha times. For Fajr, it is recommended to pray during its specified time window before sunrise. However, Islamic jurisprudence provides details on permissible delays and timings within each prayer’s validity window.