This GST to IST converter turns any time in Gulf Standard Time (GST) into India Standard Time (IST), using your device clock so daylight saving is applied automatically. IST is 1 hour 30 minutes ahead of GST. GST is UTC+4; IST is UTC+5:30.
GST covers Dubai, Abu Dhabi, Muscat; IST covers Mumbai, Delhi, Bengaluru. Neither zone observes daylight saving time, so the difference is the same every day of the year.
GST and IST UTC offsets
GST
UTC+4
Gulf Standard Time
No daylight saving time
IST
UTC+5:30
India Standard Time
No daylight saving time
GST to IST conversion table
| GST | IST |
|---|---|
| 12 am | 1:30 am |
| 3 am | 4:30 am |
| 6 am | 7:30 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 |
| 8 pm | 9:30 pm |
| 10 pm | 11:30 pm |
Frequently asked questions
What is the time difference between GST and IST?
IST is 1 hour 30 minutes ahead of GST. That comes from the UTC offsets: GST is UTC+4 and IST is UTC+5:30. For example, 9 am GST = 10:30 am IST.
Is IST ahead of or behind GST?
IST is 1 hour 30 minutes ahead of GST, so when it is noon in GST it is 1:30 pm in IST. Ahead means the clock there already shows a later time; a call at 5 pm GST lands at 6:30 pm IST.
Does GST or IST observe daylight saving time in 2026?
No. Neither GST nor IST changes its clocks, so the 1 hour 30 minutes difference holds every day of the year. That makes recurring meetings between Dubai and Mumbai easy to keep at a fixed local time on both ends.
What is the best time for a meeting between GST and IST?
Standard office hours (9 am to 5 pm) overlap from 9 am to 3.5 pm GST, which is 10.5 am to 5 pm IST. Pick a slot inside that window and both sides stay within a normal working day. Check the daylight saving dates above, because the window moves by an hour when only one side has changed clocks.
Which cities use GST and IST?
GST (Gulf Standard Time) is used in Dubai, Abu Dhabi, Muscat. IST (India Standard Time) is used in Mumbai, Delhi, Bengaluru, Kolkata. Some cities inside a zone skip daylight saving, noted in parentheses, so their offset matches only part of the year.