GST to IST Converter
IST is 1 hour 30 minutes ahead of GST all year.
IST to GST insteadTime difference between GST and IST
IST is 1 hour 30 minutes ahead of GST all year.
Neither side uses daylight saving time, so the difference never changes.
GST to IST conversion table
| GST | ISTAll year |
|---|---|
| 12 AM | 1:30 AM |
| 1 AM | 2:30 AM |
| 2 AM | 3:30 AM |
| 3 AM | 4:30 AM |
| 4 AM | 5:30 AM |
| 5 AM | 6:30 AM |
| 6 AM | 7:30 AM |
| 7 AM | 8:30 AM |
| 8 AM | 9:30 AM |
| 9 AM | 10:30 AM |
| 10 AM | 11:30 AM |
| 11 AM | 12:30 PM |
| 12 PM | 1:30 PM |
| 1 PM | 2:30 PM |
| 2 PM | 3:30 PM |
| 3 PM | 4:30 PM |
| 4 PM | 5:30 PM |
| 5 PM | 6:30 PM |
| 6 PM | 7:30 PM |
| 7 PM | 8:30 PM |
| 8 PM | 9:30 PM |
| 9 PM | 10:30 PM |
| 10 PM | 11:30 PM |
| 11 PM | 12:30 AM+1 day |
Best time to meet
Working hours (9 AM – 5 PM) overlap for 6 hours 30 minutes: 9 AM – 3:30 PM GST (10:30 AM – 5 PM IST). That window is the best time for calls and meetings.
Frequently asked questions
What time is it in IST when it's 9 AM in GST?
10:30 AM. IST is 1 hour 30 minutes ahead of GST.
How many hours is IST ahead of GST?
1 hour 30 minutes, all year round. Neither side uses daylight saving time, so the difference never changes.
Does GST use daylight saving time?
No. Gulf Standard Time stays at UTC+4 all year.
Does IST use daylight saving time?
No. India Standard Time stays at UTC+5:30 all year.
When is the best time to schedule a meeting between GST and IST?
Working hours (9 AM – 5 PM) overlap for 6 hours 30 minutes: 9 AM – 3:30 PM GST (10:30 AM – 5 PM IST). That window is the best time for calls and meetings.
Which GST and IST does this page use?
GST here means Gulf Standard Time (UTC+4), not South Georgia Time. IST here means India Standard Time (UTC+5:30), not Irish or Israel Standard Time.