Your timetable · visible arithmetic
Fajr to Maghrib duration calculator
Enter Fajr and Maghrib from the timetable and convention you intend to compare.
The result is the forward same-day clock interval plus its arithmetic midpoint.
Formula
How it is calculated
duration = (Maghrib − Fajr) mod 24 h- Enter both local timetable values.
- Measure forward from Fajr to Maghrib.
- Divide the duration by two for the midpoint.
What the result means
The result compares two entered times only. It is not a fasting ruling and does not determine either boundary.
All decision-bearing times, offsets or coordinates remain visible inputs. The page does not look up a hidden local convention, mosque timetable or current location.
Limits and local confirmation
The result is clock arithmetic, not a determination of when a prayer begins. Calculation methods, local observations, high-latitude rules and authority timetables can differ.
For worship planning, confirm the applicable times, method and interpretation with the local mosque or authority you follow.
Questions about this calculation
Does this fasting-duration calculator choose prayer times for me?
No. It uses only the timetable values or coordinates you enter. Obtain prayer times and method guidance from a trusted local timetable, mosque or authority.
Does it store my values or location?
No. The arithmetic runs in your browser and the form does not submit coordinates, times or results to a server.
What happens when an interval crosses midnight?
Clock-interval tools move forward on a 24-hour clock, so an end time earlier than the start is treated as occurring on the following calendar day.
Need a full location-based timetable? Use the prayer times and Qibla calculator.