GMT to IST Converter
IST is 5 hours and 30 minutes ahead of GMT · IST → GMT
GMT
Greenwich Mean Time · UTC · UTC+00:00
Current offset note
The live clocks use today's IANA timezone rules. Right now GMT is displaying as UTC (UTC+00:00) and IST is displaying as GMT+5:30 (UTC+05:30), so this table reflects the current real-world offset.
Best time to call
Schedule between 9:00 AM – 11:00 AM GMT — that’s 2:30 PM – 4:30 PM IST. These are the overlapping business hours (9 AM – 5 PM) in both time zones.
Meeting planner for GMT and IST
Use these notes for recurring calls, handoffs, webinars, and launch timing across both zones.
Current difference
IST is 5 hours and 30 minutes ahead of GMT using the current offsets shown by the live clocks.
Workday overlap
Overlap is limited: 9:00 AM – 11:00 AM GMT equals 2:30 PM – 4:30 PM IST.
Recurring meetings
If either zone changes for daylight saving time, recheck the conversion before March-April and October-November meetings.
Quick Reference
| GMT | IST |
|---|---|
| Midnight (00:00) | 5:30 AM |
| 6 AM (06:00) | 11:30 AM |
| 9 AM (09:00) | 2:30 PM |
| Noon (12:00) | 5:30 PM |
| 3 PM (15:00) | 8:30 PM |
| 6 PM (18:00) | 11:30 PM |
| 9 PM (21:00) | 2:30 AM |
GMT to IST Conversion Table
Green rows indicate overlapping business hours (9 AM – 5 PM) in both zones
| GMT (24h) | GMT (12h) | IST (24h) | IST (12h) | |
|---|---|---|---|---|
| 00:00 | 12:00 AM | 05:30 | 5:30 AM | |
| 01:00 | 1:00 AM | 06:30 | 6:30 AM | |
| 02:00 | 2:00 AM | 07:30 | 7:30 AM | |
| 03:00 | 3:00 AM | 08:30 | 8:30 AM | |
| 04:00 | 4:00 AM | 09:30 | 9:30 AM | |
| 05:00 | 5:00 AM | 10:30 | 10:30 AM | |
| 06:00 | 6:00 AM | 11:30 | 11:30 AM | |
| 07:00 | 7:00 AM | 12:30 | 12:30 PM | |
| 08:00 | 8:00 AM | 13:30 | 1:30 PM | |
| 09:00 | 9:00 AM | 14:30 | 2:30 PM | ● |
| 10:00 | 10:00 AM | 15:30 | 3:30 PM | ● |
| 11:00 | 11:00 AM | 16:30 | 4:30 PM | ● |
| 12:00 | 12:00 PM | 17:30 | 5:30 PM | |
| 13:00 | 1:00 PM | 18:30 | 6:30 PM | |
| 14:00 | 2:00 PM | 19:30 | 7:30 PM | |
| 15:00 | 3:00 PM | 20:30 | 8:30 PM | |
| 16:00 | 4:00 PM | 21:30 | 9:30 PM | |
| 17:00 | 5:00 PM | 22:30 | 10:30 PM | |
| 18:00 | 6:00 PM | 23:30 | 11:30 PM | |
| 19:00 | 7:00 PM | 00:30 | 12:30 AM | next day |
| 20:00 | 8:00 PM | 01:30 | 1:30 AM | next day |
| 21:00 | 9:00 PM | 02:30 | 2:30 AM | next day |
| 22:00 | 10:00 PM | 03:30 | 3:30 AM | next day |
| 23:00 | 11:00 PM | 04:30 | 4:30 AM | next day |
About GMT and IST
Frequently Asked Questions
What is the time difference between GMT and IST?
GMT (Greenwich Mean Time) is UTC+00:00, while IST (India Standard Time) is UTC+05:30. IST is 5 hours and 30 minutes ahead of GMT. When it’s 12:00 PM (noon) in GMT, it’s 5:30 PM in IST.
When is 9 AM GMT in IST?
9:00 AM GMT is 2:30 PM IST. This conversion is useful for scheduling morning meetings or calls across these time zones.
What is the best time to schedule a call between GMT and IST?
The overlapping business hours are 9:00 AM – 11:00 AM GMT, which corresponds to 2:30 PM – 4:30 PM IST. Green rows in the conversion table above mark these hours.
Does daylight saving time affect the GMT to IST conversion?
Yes, if either time zone observes DST, the offset between them may change by 1 hour during spring and autumn transitions (typically March/April and October/November). The table above shows the current offset. Use the live clocks at the top of this page for real-time accuracy, or check our interactive converter for custom dates.
How do I convert GMT to IST manually?
Add 5 hours and 30 minutes to the GMT time. For example, 2:00 PM GMT + 5 hours and 30 minutes = 7:30 PM IST. If the result is 24 or more, subtract 24 and add one day. If negative, add 24 and subtract one day.