GMT to IST Time Converter
India Standard Time (IST) is currently 5 hours 30 minutes ahead of Greenwich Mean Time (GMT). GMT is UTC+0 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 11:30 AM in GMT, which is 2:30 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: GMT 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?
GMT and IST are fixed offsets, so the difference between them never changes.
GMT is UTC+0 and never shifts. The UK is on GMT in winter but moves to BST (UTC+1) from late March to late October.
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 GMT?
IST is currently 5 hours 30 minutes ahead of GMT. GMT and IST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in GMT in IST?
9:00 AM in GMT is 2:30 PM in IST.
What is the best time for a call between GMT and IST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 11:30 AM in GMT, which is 2:30 PM to 5:00 PM in IST.