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.

Greenwich Mean Time (GMT)

--:--:--

(UTC+0)

India Standard Time (IST)

--:--:--

(UTC+5:30)

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

GMTIST

12:00 AM5:30 AM

1:00 AM6:30 AM

2:00 AM7:30 AM

3:00 AM8:30 AM

4:00 AM9:30 AM

5:00 AM10:30 AM

6:00 AM11:30 AM

7:00 AM12:30 PM

8:00 AM1:30 PM

9:00 AM2:30 PMoffice hours

10:00 AM3:30 PMoffice hours

11:00 AM4:30 PMoffice hours

12:00 PM5:30 PM

1:00 PM6:30 PM

2:00 PM7:30 PM

3:00 PM8:30 PM

4:00 PM9:30 PM

5:00 PM10:30 PM

6:00 PM11:30 PM

7:00 PM12:30 AM+1 day

8:00 PM1:30 AM+1 day

9:00 PM2:30 AM+1 day

10:00 PM3:30 AM+1 day

11:00 PM4:30 AM+1 day

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?