GST to IST Converter
IST is 1 hour 30 minutes ahead of GST. 9:00 AM GST = 10:30 AM IST.
IST is 1 hour 30 minutes ahead of GST. To convert GST to IST, add 1 hour 30 minutes to the GST time: 9:00 AM GST = 10:30 AM IST.
GST (Gulf Time) is used in United Arab Emirates and Oman. IST (India Time) is used in India and Sri Lanka (UTC+5:30, no daylight saving time).
IST here means India Standard Time, not Irish or Israel Standard Time.
GST to IST time conversion table
GST to IST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| GST | IST | Day |
|---|---|---|
| 12:00 AM GST | 1:30 AM IST | night |
| 1:00 AM GST | 2:30 AM IST | night |
| 2:00 AM GST | 3:30 AM IST | night |
| 3:00 AM GST | 4:30 AM IST | night |
| 4:00 AM GST | 5:30 AM IST | night |
| 5:00 AM GST | 6:30 AM IST | — |
| 6:00 AM GST | 7:30 AM IST | — |
| 7:00 AM GST | 8:30 AM IST | — |
| 8:00 AM GST | 9:30 AM IST | — |
| 9:00 AM GST | 10:30 AM IST | work hours |
| 10:00 AM GST | 11:30 AM IST | work hours |
| 11:00 AM GST | 12:30 PM IST | work hours |
| 12:00 PM GST | 1:30 PM IST | work hours |
| 1:00 PM GST | 2:30 PM IST | work hours |
| 2:00 PM GST | 3:30 PM IST | work hours |
| 3:00 PM GST | 4:30 PM IST | work hours |
| 4:00 PM GST | 5:30 PM IST | — |
| 5:00 PM GST | 6:30 PM IST | — |
| 6:00 PM GST | 7:30 PM IST | — |
| 7:00 PM GST | 8:30 PM IST | — |
| 8:00 PM GST | 9:30 PM IST | — |
| 9:00 PM GST | 10:30 PM IST | night |
| 10:00 PM GST | 11:30 PM IST | night |
| 11:00 PM GST | 12:30 AM IST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert GST to IST
Add 1 hour 30 minutes to the GST time to get IST.
Example: 9:00 AM GST = 10:30 AM IST.
Across midnight: 11:00 PM GST = 12:30 AM IST (next day). The date changes, so always check the day as well as the hour.
Time difference between GST and IST
The time difference between GST and IST is 1 hour 30 minutes all year – IST is ahead of GST.
GST and IST during daylight saving time
- GST does not observe daylight saving time; it stays on UTC+4 all year.
- IST does not observe daylight saving time; it stays on UTC+5:30 all year.
Best time for a meeting between GST and IST
GST and IST share 6 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:30 PM GST lands between 10:30 AM and 5:00 PM IST, inside working hours for both.
GST to IST FAQ
What is the time difference between GST and IST?
IST is 1 hour 30 minutes ahead of GST all year. 9:00 AM GST = 10:30 AM IST.
What is 9 AM GST in IST?
9:00 AM GST is 10:30 AM IST.
What is 12 PM (noon) GST in IST?
12:00 PM GST is 1:30 PM IST.
Is IST ahead of or behind GST?
IST is 1 hour 30 minutes ahead of GST, so it is later in IST than in GST.
Does GST change for daylight saving time?
No. GST stays on the same offset all year, so conversions never shift for daylight saving time.
Does IST change for daylight saving time?
No. IST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between GST and IST?
GST and IST share 6 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:30 PM GST lands between 10:30 AM and 5:00 PM IST, inside working hours for both.
Related conversions
Convert IST to GST
Convert GST to other time zones
Convert other time zones to IST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.