GMT to UTC converter

UK Time (GMT) is UTC+0 and observes British Summer Time (BST, UTC+1, roughly March–October). It covers London, Manchester and Edinburgh.

Coordinated Universal Time (UTC) is UTC+0 with no daylight saving. It covers the global reference used in aviation, computing and science.

Coordinated Universal Time usually shows the same clock time as UK Time, though daylight saving can shift the difference by an hour at some times of year.

Time difference between UK Time and Coordinated Universal Time

Coordinated Universal Time usually shows the same clock time as UK Time, though daylight saving can shift the difference by an hour at some times of year. Put the other way around: coordinated Universal Time (UTC) and UK Time (GMT) usually share the same clock time. The table above shows the difference hour by hour using today's actual offsets.

Best time to call Coordinated Universal Time from UK Time

Office hours overlap for about 8 hours a day: 9:00 AM–5:00 PM in UK Time is 9:00 AM–5:00 PM in Coordinated Universal Time. Book calls inside this window and nobody is out of hours. Daylight saving can shift these times by an hour at some points in the year.