GMT to IST time difference
IST is 5.5 hours ahead of GMT in standard time, and 4.5 hours ahead of GMT when daylight saving time is in effect. Because the US, Europe and Australia switch on different dates, the gap can briefly differ — the converter always uses the exact date.
Common GMT to IST times (standard time)
| Greenwich Mean Time | India Standard Time |
|---|---|
| 12:00 AM GMT | 5:30 AM IST |
| 3:00 AM GMT | 8:30 AM IST |
| 6:00 AM GMT | 11:30 AM IST |
| 8:00 AM GMT | 1:30 PM IST |
| 9:00 AM GMT | 2:30 PM IST |
| 12:00 PM GMT | 5:30 PM IST |
| 3:00 PM GMT | 8:30 PM IST |
| 5:00 PM GMT | 10:30 PM IST |
| 6:00 PM GMT | 11:30 PM IST |
| 9:00 PM GMT | 2:30 AM the next day IST |
About GMT and IST
Greenwich Mean Time (GMT) is UTC+0 in winter and UTC+1 during daylight saving time. India Standard Time (IST) is UTC+5:30 all year.
Scheduling a meeting? The best overlap is usually morning in GMT, which is afternoon or evening in IST. Use the 24-hour table in the converter to find a slot that works for everyone.
Frequently asked questions
What is the time difference between GMT and IST?
IST is 5.5 hours ahead of GMT in standard time, and 4.5 hours ahead of GMT when daylight saving time is in effect. Because the US, Europe and Australia switch on different dates, the gap can briefly differ — the converter always uses the exact date.
Does this handle daylight saving time?
Yes. The converter uses your browser’s up-to-date time zone database, so GMT/IST daylight saving changes are applied automatically for the date you pick.
How do I convert GMT to IST manually?
Add 5.5 hours to the GMT time (in standard time). For example, 9:00 AM GMT is 2:30 PM IST.