Calculation methods

Prayer Time Calculation Methods

Islamic prayer times can differ because organizations use different Fajr and Isha twilight angles, Maghrib rules, and Asr shadow methods. Compare all supported methods here.

Why calculation methods matter

Islamic prayer-time calculation methods are not just labels. They affect Fajr, Isha, and sometimes Maghrib because organizations use different twilight angles, fixed intervals, or regional conventions. This is why the same city can show slightly different times across apps and mosque calendars.

When in doubt, follow your local masjid. Use this guide to understand why differences happen and to choose the method that best matches your community timetable.

Supported methods at a glance

Karachi

A widely used method in Pakistan, India, Bangladesh, and many South Asian communities.

Read Karachi guide

Muslim World League

A common international calculation method used across many regions and apps.

Read Muslim World League guide

Egyptian

A method commonly associated with Egyptian prayer-time calculations.

Read Egyptian guide

ISNA

A common North American method used by many US and Canadian users.

Read ISNA guide

Shia Qum

A Shia Ithna Ashari style method with custom Fajr, Maghrib, and Isha parameters.

Read Shia Qum guide

Umm al-Qura

A Makkah-based method commonly associated with Saudi Arabia.

Read Umm al-Qura guide

Tehran

A Tehran-based method with its own Fajr, Maghrib, and Isha parameters.

Read Tehran guide

Supported methods

University of Islamic Sciences, Karachi

A widely used method in Pakistan, India, Bangladesh, and many South Asian communities.

Open Karachi guide

Egyptian General Authority of Survey

A method commonly associated with Egyptian prayer-time calculations.

Open Egyptian guide

Islamic Society of North America

A common North American method used by many US and Canadian users.

Open ISNA guide

Shia Ithna Ashari, Leva Research Institute, Qum

A Shia Ithna Ashari style method with custom Fajr, Maghrib, and Isha parameters.

Open Shia Qum guide

Institute of Geophysics, University of Tehran

A Tehran-based method with its own Fajr, Maghrib, and Isha parameters.

Open Tehran guide