How are prayer times calculated for Chelmsford?
Chelmsford lies at a latitude of about 51.74°N, in Essex. Because prayer times depend on the position of the sun at a given location, the timings here are calculated specifically for these coordinates rather than borrowed from another town.
Today the sun rises at 07:36 and Maghrib falls at 17:47, giving 10h 11m between the two. As the year turns this daylight window lengthens and shortens, which is why Fajr (currently 05:43) and Isha (currently 19:33) shift gradually from week to week.
When praying in Chelmsford, the Qibla is faced towards the Kaaba in Makkah, which lies on a bearing of 120° from here, roughly to the south-east — a great-circle distance of about 4,770 km.
Prayer times in Chelmsford are very close to those in neighbouring towns, though they differ by a minute or two with distance. Nearby you can also check Basildon (18 km), Southend-on-Sea (26 km) and Ilford (34 km).