Ramadan Fasting Calculator – Calculate Today’s Fasting Hours
Calculate daily Ramadan fasting hours from Fajr to Maghrib for your city and date, with Ramadan 2027 timing guidance and location-based prayer-time context.
Calculate Your Ramadan Fasting Hours
Enter a city, country and date. The calculator uses that location’s Fajr and Maghrib times and returns the fasting duration in hours and minutes.
Ramadan Fasting Calculator: Calculate Today’s Fasting Hours
The Ramadan Fasting Calculator helps you calculate how long a daily fast lasts for a selected city and date. Ramadan fasting runs from Fajr until sunset as Maghrib begins, so the result is the interval between those two local prayer-time boundaries.
FAST START FAJR→FAST END MAGHRIB=RESULT HOURS + MINUTES
The Ramadan Fasting Calculator helps you calculate how long a daily fast lasts for a selected city and date. Ramadan fasting runs from Fajr until sunset as Maghrib begins, so the result is the interval between those two local prayer-time boundaries.
How to Use the Ramadan Fasting Calculator
Choose the location requested by the tool and use the applicable date. The calculator takes local Fajr as the start of the fast and Maghrib as the end, then calculates the elapsed time between them.
- Choose your location. Fasting hours depend on the city, not simply the country.
- Use the correct date. Fajr and Maghrib shift through the month.
- Check the prayer-time basis. Calculation methods can affect published times.
- Read the duration. The result expresses the interval in hours and minutes.
How Are Ramadan Fasting Hours Calculated?
The basic duration calculation is straightforward: subtract the local Fajr time from the local Maghrib time for the same date. For example, if Fajr begins at 5:10 AM and Maghrib begins at 6:40 PM, the interval is 13 hours and 30 minutes. The calculator performs this time calculation; it does not decide religious rulings.
Why Fasting Duration Changes by City
Daylight and twilight vary by latitude, longitude, season and date. Muslims in different cities can therefore experience different fasting durations on the same Ramadan day. A timetable for New York should not be used to estimate the exact duration for London, Dubai, Karachi or another city.
Ramadan 2027 Fasting Hours
Ramadan 2027 is expected in February 2027, subject to moon sighting and the Islamic lunar calendar. Because Ramadan moves through the seasons, fasting duration in 2027 will not simply match a timetable from a previous year.
Use the Ramadan Calendar 2027 for month-level planning and the calculator for a location-and-date-specific duration. For all five daily prayers, see Ramadan 2027 Prayer Times.
Fajr Is the Start of the Daily Fast
For this calculator, Fajr is the start boundary. Suhoor is the pre-dawn meal eaten before the fasting period begins. Some timetables also display an earlier Imsak value, so users should understand which value their local authority uses rather than silently substituting one label for another.
Our Suhoor Time Today guide explains the relationship between Suhoor, Sehri, Fajr and Imsak.
Maghrib Is the End of the Daily Fast
The other boundary is sunset as Maghrib begins. This is associated with Iftar, the breaking of the daily Ramadan fast. Since sunset changes by location and date, the end time also changes throughout the month.
Use Iftar Time Today when you need the local fast-breaking time rather than only the total duration.
Fasting hours are a duration, not another prayer time
A result such as “13 hours 42 minutes” describes the elapsed period between Fajr and Maghrib. It should not be treated as a new religious time or ruling.
A result such as “13 hours 42 minutes” describes the elapsed period between Fajr and Maghrib. It should not be treated as a new religious time or ruling.
Why Two Fasting Calculators May Give Different Results
Two services can agree on the arithmetic yet show slightly different fasting durations because the underlying prayer times differ. Fajr is especially sensitive to the selected calculation convention. Location settings, time-zone data, rounding and local adjustments can also affect the result.
AlAdhan documents multiple calculation methods and explains that methods can use different Fajr parameters and local adjustments. See its prayer-time calculation methods for technical background.
Calculated Time vs Local Mosque Timetable
A calculated duration is useful for planning and comparison. It is not a substitute for the timetable or religious guidance followed by your local mosque or recognized Islamic authority. Small timing differences can be legitimate when different calculation settings or local conventions are used.
Our Prayer-Time Methodology explains how timing information on this website should be interpreted.
Using the Calculator When Travelling
If you travel during Ramadan, update the location rather than continuing to use the fasting duration from your departure city. Fajr and Maghrib are location-dependent, and a change in time zone or latitude can materially change the result.
- Confirm the city and country before calculating.
- Use the date for which you need the fasting duration.
- Check that the result uses local Fajr and Maghrib times.
- Do not assume another city has the same fasting hours.
- Compare with trusted local guidance when exact timing matters.
- Recalculate after travelling to a different location.
What the Ramadan Fasting Calculator Does Not Decide
The tool calculates a time interval. It does not determine whether a person is required to fast, whether a fast is valid, or how exemptions and make-up fasts apply. Those are religious questions and can also intersect with individual health circumstances.
For general educational information, see the Ramadan Fasting Rules. For personal religious or medical circumstances, seek qualified guidance appropriate to your situation.
Plan Ramadan 2027 with Location-Based Times
Use the calculator together with the Ramadan calendar, prayer-time pages, Suhoor guide and Iftar guide. This gives a clearer picture of when the fast starts, when it ends and how long it lasts in your city.
As Ramadan 2027 approaches, recheck the selected location, date and local timetable before relying on a calculated result for precise religious timing.
Frequently asked questions
What does the Ramadan Fasting Calculator calculate?
It calculates the elapsed time between local Fajr and Maghrib for the selected location and date, expressing the daily fasting duration in hours and minutes.
When does a Ramadan fast begin and end?
The daily fast begins at Fajr and ends at sunset as Maghrib begins. Use trusted local guidance when exact religious timing matters.
Why are Ramadan fasting hours different between cities?
Fajr and sunset depend on geographic location, date and season, so the duration between them can vary from city to city.
Why can two fasting calculators show different durations?
The arithmetic may be the same, but underlying Fajr or Maghrib times can differ because of calculation methods, settings, rounding or local adjustments.
Does the calculator use Imsak or Fajr as the start time?
The fasting duration described on this page uses Fajr as the start boundary. Some local timetables separately display an earlier Imsak time.
Can I use the calculator while travelling?
Yes, but update the location to the city where you are fasting because Fajr, Maghrib and the resulting duration are location-dependent.
Will fasting hours stay the same throughout Ramadan 2027?
No. Fajr and Maghrib shift as the dates change, so the daily fasting duration can change through the month.
Does the calculator provide religious rulings about fasting?
No. It calculates a time interval. Questions about exemptions, validity, make-up fasts or individual circumstances require appropriate qualified guidance.