GMT to IST Time Converter
Convert Greenwich Mean Time to India Standard Time instantly.
Scroll the timeline to check any hour of the day.
Greenwich Mean Time
GMT
6:51
India Standard Time
IST
11:21
GMT is on daylight savings (BST), while IST is on standard time (IST) right now.
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How the GMT to IST time difference works
IST is 4 hours 30 minutes ahead of GMT. Greenwich Mean Time (GMT) is the time zone of the United Kingdom and Ireland. India Standard Time (IST) is the time zone of India and Sri Lanka. For example, 9:00 AM GMT is 1:30 PM IST. Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Time difference
4 hours 30 minutes
Daylight saving
GMT only
GMT offset
UTC+0
IST offset
UTC+5:30
GMT to IST conversion chart
| Greenwich Mean Time (GMT) | India Standard Time (IST) |
|---|---|
| 12:00 AM | 4:30 AM |
| 1:00 AM | 5:30 AM |
| 2:00 AM | 6:30 AM |
| 3:00 AM | 7:30 AM |
| 4:00 AM | 8:30 AM |
| 5:00 AM | 9:30 AM |
| 6:00 AM | 10:30 AM |
| 7:00 AM | 11:30 AM |
| 8:00 AM | 12:30 PM |
| 9:00 AM | 1:30 PM |
| 10:00 AM | 2:30 PM |
| 11:00 AM | 3:30 PM |
| 12:00 PM | 4:30 PM |
| 1:00 PM | 5:30 PM |
| 2:00 PM | 6:30 PM |
| 3:00 PM | 7:30 PM |
| 4:00 PM | 8:30 PM |
| 5:00 PM | 9:30 PM |
| 6:00 PM | 10:30 PM |
| 7:00 PM | 11:30 PM |
| 8:00 PM | 12:30 AM +1 day |
| 9:00 PM | 1:30 AM +1 day |
| 10:00 PM | 2:30 AM +1 day |
| 11:00 PM | 3:30 AM +1 day |
Best time to meet
A standard 9 to 5 workday overlaps from 9:00 AM to 12:30 PM GMT (1:30 PM to 5:00 PM IST). Schedule inside that window to catch both coasts during business hours.
Cities in each time zone
Greenwich Mean Time (GMT)
LondonDublinLisbonEdinburghManchester
India Standard Time (IST)
MumbaiDelhiBengaluruKolkataChennaiHyderabad
GMT to IST questions
Is IST ahead of or behind GMT?
IST is 4 hours 30 minutes ahead of GMT. So 9:00 AM GMT is 1:30 PM IST, and 5:00 PM GMT is 9:30 PM IST.
What time is IST when it is 12:00 PM GMT?
When it is 12:00 PM (noon) GMT in Greenwich Mean Time, it is 4:30 PM IST in India Standard Time.
How many hours difference is there between GMT and IST?
There is a 4 hours 30 minutes difference. India Standard Time (IST) runs 4 hours 30 minutes ahead of Greenwich Mean Time (GMT).
Do GMT and IST observe daylight saving time?
Greenwich Mean Time observes daylight saving time but India Standard Time does not, so the difference between them changes by an hour twice a year.
What is the best time to schedule a meeting between GMT and IST?
A standard 9-to-5 workday overlaps from 9:00 AM to 12:30 PM GMT (1:30 PM to 5:00 PM IST). Scheduling inside that window keeps the call during business hours in both Greenwich Mean Time and India Standard Time.
Which cities use GMT and IST?
Greenwich Mean Time (GMT) covers cities such as London, Dublin, Lisbon, Edinburgh, Manchester. India Standard Time (IST) covers cities such as Mumbai, Delhi, Bengaluru, Kolkata, Chennai, Hyderabad.