Faith & Calendars
Fasting hours calculator
Fasting duration (Ramadan) between dawn and sunset.
- Instant
- Free
- Private (processed locally)
- No sign-up
Calculate the fasting duration
Enter your location, timezone and date: the tool gives the suhoor end (Fajr), iftar (Maghrib) and the total duration.
Reference
- Fast = from Fajr to Maghrib
- Suhoor: pre-dawn meal
- Iftar: breaking at sunset
- Longer duration far from the equator
Local astronomical calculation. No location data sent.
Frequently asked questions
When does the fast start and end?
The fast runs from Fajr (dawn) to Maghrib (sunset). Suhoor is taken before Fajr, iftar breaks the fast at Maghrib.
Why does the duration vary?
It depends on latitude and date: days are longer in summer and the duration grows far from the equator.
Which angle for Fajr?
Often 18° below the horizon (MWL method). You can adjust it to your local method.
Is my data private?
Yes: you enter the location yourself, the calculation is local, with no geolocation or sending.