GST to IST Converter
Understanding GST and IST Time Zones
Gulf Standard Time (GST)
Gulf Standard Time is observed in undefined and uses the offset UTC+4. Major cities in this time zone include Dubai, Abu Dhabi, Doha. This time zone serves a significant global region with important economic and cultural hubs.
India Standard Time (IST)
India Standard Time operates at UTC+5.5, covering undefined. Key cities include Mumbai, Delhi, Bangalore. The 1.5-hour forward offset from GST means that when professionals in Dubai start their workday at 9:00 AM, it is already 10:30 AM in Mumbai.
GST is also commonly referred to as Dubai time, Gulf time, UAE time. IST is also known as India time, Indian time, Mumbai time, Delhi time. So if you are searching for Dubai time to India time, this is the same conversion as GST to IST.
Complete GST to IST Conversion Table
The table below shows every two-hour increment converted from Gulf Standard Time to India Standard Time. Business hours (9 AM – 5 PM) are highlighted for easy scheduling reference.
| GST (Gulf Standard Time) | IST (India Standard Time) |
|---|---|
| 12:00 AM (00:00) | 1:30 AM (01:30) |
| 2:00 AM (02:00) | 3:30 AM (03:30) |
| 4:00 AM (04:00) | 5:30 AM (05:30) |
| 6:00 AM (06:00) | 7:30 AM (07:30) |
| 8:00 AM (08:00) | 9:30 AM (09:30) |
| 10:00 AM (10:00) | 11:30 AM (11:30) |
| 12:00 PM (12:00) | 1:30 PM (13:30) |
| 2:00 PM (14:00) | 3:30 PM (15:30) |
| 4:00 PM (16:00) | 5:30 PM (17:30) |
| 6:00 PM (18:00) | 7:30 PM (19:30) |
| 8:00 PM (20:00) | 9:30 PM (21:30) |
| 10:00 PM (22:00) | 11:30 PM (23:30) |
Times shown in 12-hour and 24-hour format. Last updated 2026-03-09.
Scheduling Between GST and IST
When coordinating deliverables across GST and IST, set deadlines in the earlier time zone to avoid end-of-day confusion. A "5 PM deadline" should specify which zone to prevent missed deliveries due to the 1.5-hour offset.
The small 1.5-hour gap between GST and IST means that most of the business day overlaps, making real-time collaboration straightforward. Morning meetings in GST align well with late morning schedules in IST.
Travel Between Dubai and Mumbai
Flight times between Dubai and Mumbai often appear misleading because of the time zone shift. A departure at 10:00 AM GST arriving at 1.5:00 PM IST may look long, but remember to factor in the 1.5-hour offset.
Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 1.5-hour shift between GST and IST, plan for a quick adjustment of 1–2 days.
Daylight Saving Time Considerations
Countries near the equator — including Singapore, most of Africa, and parts of South America — do not observe DST, making their offsets constant year-round. This simplifies scheduling compared to US or European zones.
For the GST to IST conversion specifically: GST (UTC+4) and IST (UTC+5.5) neither observes DST, so the 1.5-hour offset remains constant throughout the year. This makes scheduling reliable and predictable.
Related Time Zone Conversions
References & Resources
Frequently Asked Questions
GST (Gulf Standard Time) is 1.5 hours behind IST (India Standard Time). GST is UTC+4 and IST is UTC+5.5.
When it is 12:00 PM (noon) in GST, it is 1:30 PM in IST.
The best overlap for business hours is approximately 10:00 AM to 6:00 PM IST, which corresponds to 9:00 AM to 5:00 PM in GST.
Countries near the equator — including Singapore, most of Africa, and parts of South America — do not observe DST, making their offsets constant year-round. This simplifies scheduling compared to US or European zones.