IST to GST Converter
Understanding IST and GST Time Zones
India Standard Time (IST)
India Standard Time is observed in undefined and uses the offset UTC+5.5. Major cities in this time zone include Mumbai, Delhi, Bangalore. This time zone serves a significant global region with important economic and cultural hubs.
Gulf Standard Time (GST)
Gulf Standard Time operates at UTC+4, covering undefined. Key cities include Dubai, Abu Dhabi, Doha. The 1.5-hour backward offset from IST means that when professionals in Mumbai start their workday at 9:00 AM, it is already 7:30 AM in Dubai.
IST is also commonly referred to as India time, Indian time, Mumbai time, Delhi time. GST is also known as Dubai time, Gulf time, UAE time. So if you are searching for India time to Dubai time, this is the same conversion as IST to GST.
Complete IST to GST Conversion Table
The table below shows every two-hour increment converted from India Standard Time to Gulf Standard Time. Business hours (9 AM – 5 PM) are highlighted for easy scheduling reference.
| IST (India Standard Time) | GST (Gulf Standard Time) |
|---|---|
| 12:00 AM (00:00) | 10:30 PM (22:30) (previous day) |
| 2:00 AM (02:00) | 12:30 AM (00:30) |
| 4:00 AM (04:00) | 2:30 AM (02:30) |
| 6:00 AM (06:00) | 4:30 AM (04:30) |
| 8:00 AM (08:00) | 6:30 AM (06:30) |
| 10:00 AM (10:00) | 8:30 AM (08:30) |
| 12:00 PM (12:00) | 10:30 AM (10:30) |
| 2:00 PM (14:00) | 12:30 PM (12:30) |
| 4:00 PM (16:00) | 2:30 PM (14:30) |
| 6:00 PM (18:00) | 4:30 PM (16:30) |
| 8:00 PM (20:00) | 6:30 PM (18:30) |
| 10:00 PM (22:00) | 8:30 PM (20:30) |
Times shown in 12-hour and 24-hour format. Last updated 2026-03-09.
Scheduling Between IST and GST
For business scheduling, the optimal overlap window between IST and GST falls roughly between 10.5:00 AM and 5:00 PM IST. This ensures both Mumbai and Dubai teams are within standard working hours.
The small 1.5-hour gap between IST and GST means that most of the business day overlaps, making real-time collaboration straightforward. Morning meetings in IST align well with early morning schedules in GST.
Travel Between Mumbai and Dubai
Travelers flying from Mumbai to Dubai should adjust their sleep schedule 1.5 days before departure at a rate of one hour per day. For this time difference, gradual adjustment reduces jet lag dramatically.
Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 1.5-hour shift between IST and GST, plan for a quick adjustment of 1–2 days.
Daylight Saving Time Considerations
During standard time months (November through March in the US), this offset is fixed. However, if either zone observes daylight saving time, the difference may temporarily shift by one hour during transition weeks in spring and autumn.
For the IST to GST conversion specifically: IST (UTC+5.5) and GST (UTC+4) 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
IST (India Standard Time) is 1.5 hours ahead of GST (Gulf Standard Time). IST is UTC+5.5 and GST is UTC+4.
When it is 12:00 PM (noon) in IST, it is 10:30 AM in GST.
The best overlap for business hours is approximately 7:00 AM to 3:00 PM GST, which corresponds to 9:00 AM to 5:00 PM in IST.
During standard time months (November through March in the US), this offset is fixed. However, if either zone observes daylight saving time, the difference may temporarily shift by one hour during transition weeks in spring and autumn.