Work out ramadan fasting hours instantly with clear inputs, formula shown and shareable results.
The fast runs from Fajr to Maghrib, so its length is the difference between those two times wrapped into a 24 hour day, and the eating window is the remainder. Fast length varies enormously with latitude and season, from about eleven hours near the equator to over twenty in far northern summers.
Fast length
hours = Maghrib time - Fajr time, wrapped into 24 hours
hours = Maghrib time - Fajr time, wrapped into 24 hours. The fast runs from Fajr to Maghrib, so its length is the difference between those two times wrapped into a 24 hour day, and the eating window is the remainder.
Fast length varies enormously with latitude and season, from about eleven hours near the equator to over twenty in far northern summers.
Enter fajr time as a decimal hour, maghrib time as a decimal hour. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.