Convert IST to GMT
India Standard Time (IST) to Greenwich Mean Time (GMT)
When it's 12:00 PM in Mumbai, it's 6:30 AM GMT
Interactive Converter
Pick any time and date to convert between IST and GMT.
IST to GMT Conversion Table
Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.
| Mumbai (IST) | GMT (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 Meeting Window
Top meeting times for teams in IST and GMT (9 AM -- 6 PM work hours, 1-hour meeting).
All members within working hours. Everyone in mid-day range.
All members within working hours. Everyone in mid-day range.
All members within working hours. 1 in mid-day range (9 AM–5 PM).
Time Difference & DST
GMT is 5 hours 30 minutes behind IST all year.
| Dates | Mumbai | GMT | Difference |
|---|---|---|---|
| Jan 1, 2026 – Dec 31, 2027 | UTC+5:30 | UTC±0 | -5:30h |
Mumbai, GMT do not use daylight saving time.
UK clocks use BST (UTC+1) from the last Sunday in March to the last Sunday in October.
Use the interactive converter for a specific date.
Major Cities
India Standard Time (IST)
- Mumbai
- Delhi
- Bangalore
Greenwich Mean Time (GMT)
- GMT
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