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Frequently Asked Questions (Faq)

What formulas are used to calculate prayer times?
Our prayer calculations are performed using the work done at
Why are Fajr and Isha prayer times different from other sources?
Please ensure that you have tried changing the "prayer calculation method" and the "high latitude method". These methods are the primary reason that time differences occurs in Fajr and Isha timings.
Please note that not all prayer times web sites use the same formula and the same set of parameters. This will give different results and this in turn will mean that prayer times will be different when comparing the 2 sources. This will happen whether the source is another website or whether its a timetable from your local mosque.
How accurate are these prayer times?
Prayer times are calculated from a very complex calculation and formula, involving amongst other factors the latitude and longitude of a particular location. As a result, variations in times can occur by different organisations according to approximations made using these calculations. Furthermore prayer times in high latitude areas differ even more so and this is more apparent in the summer months. As a result of this, it becomes more difficult to determine Isha and Fajr times. Hence an approximation is required and this is the reason the high latitude method was introduced.
What is the horizon?
This is the term given to the line or circle that forms the boundary between the earth and the sky
What is dawn?
Dawn is when whitishness starts to appear. The dictionary defines dawn as the time each morning at which daylight first begins
What is dusk?
Dusk is when it is dark, or when the reddishness in the sky ends. The dictionary defines dusk as the darker stages of twilight
What is the twilight angle?
To determine Isha and Fajr calculations, one needs to calculate the time when the sun is at a certain distance below the horizon. The twilight angle is used for this purpose and it is defined as the angle in degrees of the sun below the horizon, when total darkness begins or ends.
Some organisations use a fixed time after Maghrib to determine the start of Isha time The following standards exist for determining Fajr and Isha times:
Egyptian General Authority of Survey:
Region Africa, Syria, Iraq, Lebanon, Malaysia, parts of the USA
Fajr – twilight angle 19.5
Isha – twilight angle 17.5
Islamic Society of North America (ISNA):
Region Parts of the USA, Canada, parts of the UK
Fajr – twilight angle 15
Isha – twilight angle 15
Islamic Organisations Union of France:
Region France
Fajr – twilight angle 12, 15 or 18
Isha – twilight angle 12, 15 or 18
Majlis Ugama Islam Singapura:
Region Singapore
Fajr – twilight angle 20
Isha – twilight angle 18
Muslim world league:
Region Europe, Far East, parts of the USA
Fajr – twilight angle 18
Isha – twilight angle 17
Umm Al Qura:
Region The Arabian Peninsula
Fajr – twilight angle 18.5
Isha – twilight angle 90 minutes after Maghrib (120 minutes during Ramadan)
University of Islamic sciences, Karachi:
Region Pakistan, Bangladesh, India, Afghanistan, parts of Europe
Fajr – twilight angle 18
Isha – twilight angle 18
What is twilight?
Twilight is the name given to the light that is observed after sunset and before sunrise. At this point the sun is below the horizon.
What are Shafi and Hanafi?
These are the 2 schools of thoughts for determining the start of Asar prayer times
These 2 schools of thoughts use different criteria to determine the start of Asar prayer. They do not affect the timings of the other prayers.

Shafi: The start of Asar is when the shadow of any vertical object exceeds the length of an object
Hanafi: The start of Asar is when the shadow of any vertical object exceeds twice the length of an object

Usually Hanafi Asar time is approximately 1 hour later than Shafi Asar prayer time.
How are the times of the prayers determined?
The times of the prayer are determined by the position of the sun, i.e. by defining the above in astronomically measurable terms. However for countries above 48 degrees (including Britain), Fajr and Isha timings require some estimation as the twilight may persist between sunset and sunrise for certain months of the year. In these months the sun does not go below the horizon by a sufficient amount and so there is no true night. Under these circumstances Salahtimes uses the 1/7 rule method by default (for UK) to calculate the Fajr and Isha times respectively, although you can change this to an alternative method.
What are the definitions of the 5 prayer times?
Muslims pray 5 times a day. The times of each prayer vary from place to place and from day to day. It is vital that Muslims perform these prayers at the correct time
The 5 prayers are described below:

Starts at dawn or morning twilight
Ends just before sunrise

Starts at approximately 5 minutes after Zawaal
Ends at start of Asar time

The start of Asar is dependant upon the length of the shadow that is cast by an object. Different schools use different criteria.
Ends just before sunset

Starts at sunset
Ends at the start of Isha (i.e. when there is reddishness in the sky)

Starts after dusk
Ends when the evening twilight disappears (i.e. when it first starts to get light)
How can I get prayer times on my mobile phone?
In order for you to use SalahTimes on your phone, we recommend you create a bookmark to our site at For instructions in creating a bookmark please consult your user guide or manual for your device.
Alternatively, feel free to contact us, giving as much details as you possibly can regarding the device you are using such as the manufacturer and model and we will assist you as much as is possible
Which countries are prayer times available for?
This is the list of countries we provide prayer times for.
What is SalahTimes?
SalahTimes is free online service which allows prayers times to be calculated using mathematical formulas. SalahTimes can be accessed by any device (PC, phone, tablet etc). Simply navigate using your device to