What is the time difference between IST and GMT?

IST (India Standard Time) is -4h 30m behind/ahead of GMT (Greenwich Mean Time). The exact difference depends on Daylight Saving Time status in both timezones.

How do I convert IST to GMT?

Use our free converter above. Select India Standard Time as the source timezone and Greenwich Mean Time as the destination, enter the time you want to convert, and click Convert. Our tool automatically handles DST.

What is the best time to schedule a meeting between India Standard Time and Greenwich Mean Time?

The best meeting time typically falls during overlapping business hours (9 AM - 5 PM). Use our meeting planner table below to find overlapping hours between IST and GMT.

Does IST or GMT observe Daylight Saving Time?

Our converter automatically detects DST status for both timezones. The result will show DST indicators when Daylight Saving Time is active.

IST to GMT Converter

Convert India Standard Time (IST) to Greenwich Mean Time (GMT) instantly. Convert any timezone or plan a meeting.

From (IST)

To (GMT)

Time to Convert

Leave date empty to use current date

Time Difference

-4h 30m

IST is -4h 30m behind/ahead of GMT.

IST → GMT Conversion Table

IST (India Standard Time)	GMT (Greenwich Mean Time)
Jul 15 05:30	01:00
08:30	04:00
11:30	07:00
14:30	10:00
17:30	13:00
20:30	16:00
23:30	19:00
02:30	22:00

Best Meeting Times

Hours where both timezones are within business hours (9 AM - 5 PM) are highlighted in green.

IST (India Standard Time)

05:00

06:00

07:00

08:00

09:00

10:00

11:00

12:00

13:00

14:00

15:00

16:00

17:00

18:00

19:00

20:00

21:00

22:00

23:00

00:00

01:00

02:00

03:00

04:00

GMT (Greenwich Mean Time)