Ramadan Fasting Times Calculator
Allow location to fill coordinates and timezone, then see when to stop Suhoor and when to break the fast. Switch to the Ramadan calendar view for the full month, or change the Fajr method if your mosque uses a different convention.
Calculate
Result
The formula
Fasting windows follow the sun at your coordinates. Imsak/Suhoor end is Fajr (optionally a few minutes earlier). Iftar is Maghrib at sunset. Duration is the span from Fajr to Maghrib on that civil date.
Worked example
- Location near Mecca: 21.4225°N, 39.8262°E, UTC+3
- Date 2026-02-20 (Ramadan 1447), Muslim World League Fajr angle, 0 min Imsak offset
- Fajr ≈ dawn twilight; Maghrib follows sunset
Result: Suhoor ends at Fajr; Iftar at Maghrib; duration is the daylight fast length
How Ramadan fasting times are calculated
These times are astronomical estimates used for planning. Local mosques and national Ramadan calendars may add safety margins or use slightly different twilight conventions.
Suhoor, Imsak, and Fajr
The fast begins at true dawn (Fajr). Many printed calendars list an earlier Imsak time as a practical buffer before Fajr so eating stops with a margin. This tool sets Imsak to Fajr minus your chosen offset (0 means Imsak equals Fajr).
Iftar and Maghrib
Iftar is at Maghrib — when the sun’s disk sets, with a small refraction allowance used in standard prayer-time astronomy. Maghrib methods that delay by degrees (some Shia conventions) are available under Tehran and Jafari.
Fajr calculation methods
Authorities disagree on how far the sun is below the horizon for Fajr. Muslim World League commonly uses 18°; ISNA often uses 15° in North America; Egypt, Karachi, Umm al-Qura, Tehran, and Jafari publish other angles. Match your mosque when possible.
Ramadan calendar view
Calendar mode lists every day of Ramadan (Hijri month 9) in the Hijri year of the date you enter, using a standard tabular Hijri↔Gregorian conversion. Sighting-based calendars can differ by a day at the month’s start or end.
What we do not claim
We do not replace a fatwa, mosque timetable, or national Ramadan schedule. High-latitude summers and winters need local guidance when twilight never reaches the configured Fajr angle.
Interesting facts
Fasting is from dawn to sunset
Classical fiqh ties the fast to Fajr and Maghrib, not to an arbitrary clock. That is why location and date change the schedule more than the city name alone.
Imsak is often a safety margin
Many community calendars print Imsak a few minutes before Fajr so households finish Suhoor early. The religious start remains Fajr unless your local authority teaches otherwise.
Method choice moves Suhoor more than Iftar
Twilight angle mainly shifts Fajr/Imsak. Maghrib stays near sunset for most Sunni methods, so Iftar usually moves less when you switch methods.
Ramadan dates drift on the Gregorian calendar
Because the Hijri year is lunar, Ramadan shifts earlier by about 10–12 Gregorian days each year — winter fasts and summer fasts alternate over decades.
Long summer fasts at high latitudes
Near the Arctic Circle, daylight can stretch very long in summer. Confirm with your local mosque or national council when astronomical twilight rules break down.
Frequently asked questions
Open this page and allow location when prompted — we fill coordinates and timezone. Check today’s Suhoor/Imsak and Iftar, or switch View to Ramadan calendar for the full month. To plan for another place, choose Enter manually and type latitude, longitude, and UTC offset.
Fajr is dawn — when the fast begins. Imsak is often printed a few minutes earlier as a practical stop-eating time. Set Imsak offset to 0 to make them the same, or choose 5–15 minutes if that matches your local calendar.
Iftar is at Maghrib (sunset). Follow your mosque’s Maghrib if it differs by a minute or two from this estimate.
Use the same Fajr convention your mosque or national authority uses for prayer times. ISNA is common in North America; Muslim World League is a frequent international default; Umm al-Qura is associated with Saudi Arabia.
Yes. Set View to Ramadan calendar. The tool uses the Hijri year of the date you enter and lists Suhoor/Imsak and Iftar for each day of that Ramadan. Moon-sighting calendars may start or end a day earlier or later.
Flyers may use different twilight angles, fixed minute offsets, or municipal adjustments. Differences of a few minutes are common — follow the timetable your community uses for congregational Maghrib.
Yes, on this calculator page only. Permission is requested when the tool loads so today’s times appear quickly. If you decline, choose Enter manually or tap Use GPS / Retry location.
References
- Astronomical Algorithms Standard reference for solar coordinates used in civil astronomy.
- Calculation method overview Lists common organizational conventions for Fajr/Isha parameters also used for Suhoor.