BST to IST Time Converter
India Standard Time (IST) is currently 4 hours 30 minutes ahead of British Summer Time (BST). BST is UTC+1 and IST is UTC+5:30. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 12:30 PM in BST, which is 1:30 PM to 5:00 PM in IST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: BST to IST
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
BST and IST are fixed offsets, so the difference between them never changes.
BST is UTC+1, used in the UK from late March to late October. In winter the UK is on GMT. BST can also refer to Bangladesh Standard Time, which is UTC+6.
This page covers India Standard Time, UTC+5:30, which has no daylight saving. IST can also refer to Irish Standard Time (UTC+1) or Israel Standard Time (UTC+2).
Frequently Asked Questions
How many hours ahead is IST compared to BST?
IST is currently 4 hours 30 minutes ahead of BST. BST and IST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in BST in IST?
9:00 AM in BST is 1:30 PM in IST.
What is the best time for a call between BST and IST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 12:30 PM in BST, which is 1:30 PM to 5:00 PM in IST.