IST to GMT Time Converter

Greenwich Mean Time (GMT) is currently 5 hours 30 minutes behind India Standard Time (IST). IST is UTC+5:30 and GMT is UTC+0. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.

India Standard Time (IST)

--:--:--

(UTC+5:30)

Greenwich Mean Time (GMT)

--:--:--

(UTC+0)

Best Time for a Call

Both sides are inside 9:00 AM to 5:00 PM office hours between 2:30 PM and 5:00 PM in IST, which is 9:00 AM to 11:30 AM in GMT.

Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.

Hour by Hour: IST to GMT

ISTGMT

12:00 AM6:30 PM-1 day

1:00 AM7:30 PM-1 day

2:00 AM8:30 PM-1 day

3:00 AM9:30 PM-1 day

4:00 AM10:30 PM-1 day

5:00 AM11:30 PM-1 day

6:00 AM12:30 AM

7:00 AM1:30 AM

8:00 AM2:30 AM

9:00 AM3:30 AM

10:00 AM4:30 AM

11:00 AM5:30 AM

12:00 PM6:30 AM

1:00 PM7:30 AM

2:00 PM8:30 AM

3:00 PM9:30 AMoffice hours

4:00 PM10:30 AMoffice hours

5:00 PM11:30 AMoffice hours

6:00 PM12:30 PM

7:00 PM1:30 PM

8:00 PM2:30 PM

9:00 PM3:30 PM

10:00 PM4:30 PM

11:00 PM5:30 PM

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?

IST and GMT are fixed offsets, so the difference between them never changes.

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).

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.

Frequently Asked Questions

How many hours behind is GMT compared to IST?

GMT is currently 5 hours 30 minutes behind IST. IST and GMT are fixed offsets, so the difference between them never changes.

What time is 9:00 AM in IST in GMT?

9:00 AM in IST is 3:30 AM in GMT.

What is the best time for a call between IST and GMT?