Your timetable · visible arithmetic
Prayer time interval calculator
Use this when comparing two entries from the same timetable or two named points in a daily schedule.
The first value is treated as the start and the second as the later endpoint, with overnight wrap if necessary.
Formula
How it is calculated
interval = (second time − first time) mod 24 h- Enter the earlier named timetable value first.
- Enter the later value second.
- Use 24-hour wrap only if the interval crosses midnight.
What the result means
The labels and meaning remain yours; the tool only measures the forward clock interval.
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 prayer-interval 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.