GMT to IST converter
UK Time → India Standard Time
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UK Time (GMT) is UTC+0 and observes British Summer Time (BST, UTC+1, roughly March–October). It covers London, Manchester and Edinburgh.
India Standard Time (IST) is UTC+5:30 with no daylight saving. It covers Mumbai, Delhi, Bengaluru and Chennai.
India Standard Time is typically 5½ hours ahead of UK Time, though daylight saving can shift the difference by an hour at some times of year.
Best time to call India Standard Time from UK Time
Office hours overlap for about 2.5 hours a day: 9:00 AM–11:30 AM in UK Time is 2:30 PM–5:00 PM in India Standard 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.
GMT to IST, hour by hour
Today's actual offsets. Rows where both zones are inside 9am–5pm working hours are highlighted.