Fasting Calculator
Estimate fasting duration using start and end times based on your country’s time zone.
Used in: Pakistan, India, Bangladesh, Malaysia, Kuwait, Qatar, UAE, Saudi Arabia, Gulf Region and most of the Muslim world.
Permission Denied
Location access is required for prayer times.
How to enable:
- Android / Chrome: Tap the lock icon in the address bar > Site Settings > Allow Location.
- iPhone / Safari: Settings > Privacy > Location Services > Safari > "While Using".
- Desktop: Click the icon in your address bar to manage blocked permissions.
Fasting Duration
0h
0m
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Frequently Asked Questions
Islamic fasting hours are calculated from the start of Fajr (dawn) until the beginning of Maghrib (sunset). A fasting calculator uses your geographical coordinates and time zone to determine the precise interval between these two solar events. In this calculator, fasting hours are determined based on the selected date, location, and entered time.
Fasting duration depends on the sun's path, which varies based on latitude and the time of year. Locations further from the equator experience more significant changes in daylight hours between summer and winter, leading to longer or shorter fasts.
You must stop eating and drinking at the break of dawn, which coincides with the Fajr prayer time. It is recommended to finish your Suhur (pre-dawn meal) a few minutes before Fajr to ensure your fast begins correctly.
In regions where the sun does not set or the day is exceptionally long (e.g., 20+ hours), scholars often suggest following the timings of the nearest moderate city or the timings of Mecca to ensure the fast is manageable and follows Islamic principles of ease.
Yes, most accurate calculators allow users to select different Islamic conventions (such as the University of Islamic Sciences, Karachi or ISNA) which use slightly different sun angles (e.g., 12, 15, or 18 degrees) to determine the exact start of Fajr.