This GMT to IST converter turns any time in Greenwich Mean Time (GMT) into India Standard Time (IST), using your device clock so daylight saving is applied automatically. IST is 5 hours 30 minutes ahead of GMT. GMT is UTC+0; IST is UTC+5:30.
GMT covers Accra, Dakar, London in winter; IST covers Mumbai, Delhi, Bengaluru. Neither zone observes daylight saving time, so the difference is the same every day of the year.
GMT and IST UTC offsets
GMT
UTC+0
Greenwich Mean Time
No daylight saving time
IST
UTC+5:30
India Standard Time
No daylight saving time
GMT to IST conversion table
| GMT | IST |
|---|---|
| 12 am | 5:30 am |
| 3 am | 8:30 am |
| 6 am | 11:30 am |
| 8 am | 1:30 pm |
| 9 am | 2:30 pm |
| 10 am | 3:30 pm |
| 11 am | 4:30 pm |
| 12 pm | 5:30 pm |
| 1 pm | 6:30 pm |
| 2 pm | 7:30 pm |
| 3 pm | 8:30 pm |
| 4 pm | 9:30 pm |
| 5 pm | 10:30 pm |
| 6 pm | 11:30 pm |
| 8 pm | 1:30 amnext day |
| 10 pm | 3:30 amnext day |
Frequently asked questions
What is the time difference between GMT and IST?
IST is 5 hours 30 minutes ahead of GMT. That comes from the UTC offsets: GMT is UTC+0 and IST is UTC+5:30. For example, 9 am GMT = 2:30 pm IST.
Is IST ahead of or behind GMT?
IST is 5 hours 30 minutes ahead of GMT, so when it is noon in GMT it is 5:30 pm in IST. Ahead means the clock there already shows a later time; a call at 5 pm GMT lands at 10:30 pm IST.
Does GMT or IST observe daylight saving time in 2026?
No. Neither GMT nor IST changes its clocks, so the 5 hours 30 minutes difference holds every day of the year. That makes recurring meetings between Accra and Mumbai easy to keep at a fixed local time on both ends.
What is the best time for a meeting between GMT and IST?
Standard office hours (9 am to 5 pm) overlap from 9 am to 11.5 am GMT, which is 2.5 pm 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 GMT and IST?
GMT (Greenwich Mean Time) is used in Accra, Dakar, London in winter. IST (India Standard Time) is used in Mumbai, Delhi, Bengaluru, Kolkata. Note that the United Kingdom is only on GMT in winter; from late March to late October London runs on British Summer Time, one hour ahead, so use the BST pages for UK business hours in summer.