# How are UK prayer times calculated? | UK Prayer Times

> London and the M25 use the London Unified Prayer Timetable. All other UK cities use the Muslim World League method (Fajr 18°, Isha 17°) computed locally…

*Source: https://prayer-times.co.uk/answers/how-are-uk-prayer-times-calculated · Independent, free UK prayer times.*

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Methodology

# How are UK prayer times calculated?

Updated 2026-07-28

Quick Answer

London and the M25 use the London Unified Prayer Timetable. All other UK cities use the Muslim World League method (Fajr 18°, Isha 17°) computed locally from city coordinates. Times are baked into HTML daily and verified by automated checks.

## In detail

No third-party prayer-time API is used. Outside London, the adhan astronomical library computes times from latitude, longitude and date, with British Summer Time handled automatically.

At northern latitudes (Aberdeen, Inverness, Glasgow, Edinburgh and others) the sun may not reach 18° below the horizon in summer. When that happens, Fajr and Isha use a documented one-seventh-of-the-night adjustment, disclosed on the city page.

Asr can be viewed as Standard (shadow = length) or Hanafi (shadow = 2× length).

## Sources

-   [UK Prayer Times methodology (LUPT + MWL)](/methodology)
-   [Open data & citation format](/open-data)

[Methodology page](/methodology) [Open data for AI](/open-data)

## More in Methodology

-   [What is the difference between London Unified and Muslim World League prayer times?](/answers/london-unified-vs-mwl)
-   [What is the high-latitude adjustment for prayer times?](/answers/what-is-high-latitude-adjustment)
-   [What is the difference between Standard and Hanafi Asr?](/answers/standard-vs-hanafi-asr)
-   [What is the most accurate prayer times source for the UK?](/answers/best-prayer-times-app-uk)