IST to GMT Time Converter
Convert India Standard Time to Greenwich Mean Time instantly.
Scroll the timeline to check any hour of the day.
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How the IST to GMT time difference works
GMT is 5 hours 30 minutes behind IST. India Standard Time (IST) is the time zone of India and Sri Lanka.
Greenwich Mean Time (GMT) is the fixed UTC+0 reference time, used by the United Kingdom and Ireland in winter.
For example, 9:00 AM IST is 3:30 AM GMT.
Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Time difference
5 hours 30 minutes
IST to GMT conversion chart
| India Standard Time (IST) |
Greenwich Mean Time (GMT) |
| 12:00 AM |
6:30 PM -1 day |
| 1:00 AM |
7:30 PM -1 day |
| 2:00 AM |
8:30 PM -1 day |
| 3:00 AM |
9:30 PM -1 day |
| 4:00 AM |
10:30 PM -1 day |
| 5:00 AM |
11:30 PM -1 day |
| 6:00 AM |
12:30 AM |
| 7:00 AM |
1:30 AM |
| 8:00 AM |
2:30 AM |
| 9:00 AM |
3:30 AM |
| 10:00 AM |
4:30 AM |
| 11:00 AM |
5:30 AM |
| 12:00 PM |
6:30 AM |
| 1:00 PM |
7:30 AM |
| 2:00 PM |
8:30 AM |
| 3:00 PM |
9:30 AM |
| 4:00 PM |
10:30 AM |
| 5:00 PM |
11:30 AM |
| 6:00 PM |
12:30 PM |
| 7:00 PM |
1:30 PM |
| 8:00 PM |
2:30 PM |
| 9:00 PM |
3:30 PM |
| 10:00 PM |
4:30 PM |
| 11:00 PM |
5:30 PM |
Best time to meet
A standard 9 to 5 workday overlaps from 2:30 PM to 5:00 PM IST (9:00 AM to 11:30 AM GMT). Schedule inside that window to catch both coasts during business hours.
Cities in each time zone
India Standard Time (IST)
MumbaiDelhiBengaluruKolkataChennaiHyderabad
Greenwich Mean Time (GMT)
LondonDublinLisbonEdinburghManchester
IST to GMT questions
Is GMT ahead of or behind IST?
GMT is 5 hours 30 minutes behind IST. So 9:00 AM IST is 3:30 AM GMT, and 5:00 PM IST is 11:30 AM GMT.
What time is it in GMT when it is 12:00 PM IST?
When it is 12:00 PM (noon) IST in India Standard Time, it is 6:30 AM GMT in Greenwich Mean Time.
How many hours difference is there between IST and GMT?
There is a 5 hours 30 minutes difference. Greenwich Mean Time (GMT) runs 5 hours 30 minutes behind India Standard Time (IST).
Do IST and GMT observe daylight saving time?
Neither India Standard Time nor Greenwich Mean Time shifts its clocks for daylight saving time, so the 5 hours 30 minutes difference between them is the same all year. The United Kingdom and Ireland use GMT only in winter; from late March to late October they switch to British Summer Time (BST), one hour ahead of GMT.
What is the best time to schedule a meeting between IST and GMT?
A standard 9-to-5 workday overlaps from 2:30 PM to 5:00 PM IST (9:00 AM to 11:30 AM GMT). Scheduling inside that window keeps the call during business hours in both India Standard Time and Greenwich Mean Time.
Which cities use IST and GMT?
India Standard Time (IST) covers cities such as Mumbai, Delhi, Bengaluru, Kolkata, Chennai, Hyderabad. Greenwich Mean Time (GMT) covers cities such as London, Dublin, Lisbon, Edinburgh, Manchester.
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