IST to GMT Converter
Greenwich Mean Time · London, Dublin, Lisbon, Reykjavik
Also convert in reverse: GMT to IST →
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IST to GMT Conversion Table
Common IST times converted to Greenwich Mean Time
| IST (UTC+05:30) | GMT (UTC+00:00) | Note |
|---|---|---|
| 12:00 AM (midnight) | 6:30 PM | −1 day |
| 6:00 AM | 12:30 AM | |
| 9:00 AM | 3:30 AM | |
| 12:00 PM (noon) | 6:30 AM | |
| 3:00 PM | 9:30 AM | |
| 6:00 PM | 12:30 PM | |
| 9:00 PM | 3:30 PM | |
| 11:30 PM | 6:00 PM |
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About Greenwich Mean Time
How to convert IST to GMT
Indian Standard Time (IST) is UTC+5:30. Greenwich Mean Time is UTC+00:00. To convert IST to GMT, subtract 5.5 hours from your IST time.
For example, 12:00 PM IST = 6:30 AM GMT .
Time Difference: India (IST) and UK
Indian Standard Time (IST) is UTC+5:30. Greenwich Mean Time is UTC+00:00, making the difference IST −5:30 hrs. India does not observe Daylight Saving Time — IST stays fixed at UTC+5:30 year-round. If UK observes DST, the offset between IST and GMT changes by 1 hour during the DST period (typically spring–autumn in the Northern Hemisphere).
⏰ Best overlap: 3:00 IST = 9:30 AM GMT
Common IST Times in GMT
| India (IST) | UK — GMT | Day |
|---|---|---|
| 9:00 AM IST (India morning) | 3:30 AM GMT | same day |
| 12:00 PM IST (India noon) | 6:30 AM GMT | same day |
| 3:00 PM IST (India afternoon) | 9:30 AM GMT | same day |
| 6:00 PM IST (India evening) | 12:30 PM GMT | same day |
| 9:00 PM IST (India night) | 3:30 PM GMT | same day |
Convert GMT times to Indian Standard Time: GMT to IST Converter →
LSE (London) Market Hours in IST
London Stock Exchange open and close times in IST, with DST (British Summer Time) notes for Indian investors:
India–UK Work Hour Overlap
Find the best meeting windows between India (IST) and UK — including shared business hours, DST shifts, and daily overlap charts.
View India–UK Overlap →