About GMT and IST
Greenwich Mean Time (GMT, UTC+0) covers London in winter, Reykjavik and Accra, and fixed at UTC+0 (the UK switches to BST, UTC+1, in summer). India Standard Time (IST, UTC+5:30) covers Mumbai, Delhi, Bengaluru and Chennai, and fixed at UTC+5:30 all year (India has no daylight saving).
Because neither zone observes daylight saving, the difference stays 5½ hours ahead all year round.
How to convert GMT to IST
1
Check the live clocks
The current time in both zones is shown above, DST-corrected automatically.
2
Convert a specific time
Type a GMT time into the converter for the exact IST equivalent today.
3
Use the table
The hour-by-hour table covers the full day for quick scheduling.
GMT to IST conversion table
| GMT | IST |
|---|---|
| 12:00 AM | 5.5:00 AM |
| 1:00 AM | 6.5:00 AM |
| 2:00 AM | 7.5:00 AM |
| 3:00 AM | 8.5:00 AM |
| 4:00 AM | 9.5:00 AM |
| 5:00 AM | 10.5:00 AM |
| 6:00 AM | 11.5:00 AM |
| 7:00 AM | 0.5:00 PM |
| 8:00 AM | 1.5:00 PM |
| 9:00 AM | 2.5:00 PM |
| 10:00 AM | 3.5:00 PM |
| 11:00 AM | 4.5:00 PM |
| 12:00 PM | 5.5:00 PM |
| 1:00 PM | 6.5:00 PM |
| 2:00 PM | 7.5:00 PM |
| 3:00 PM | 8.5:00 PM |
| 4:00 PM | 9.5:00 PM |
| 5:00 PM | 10.5:00 PM |
| 6:00 PM | 11.5:00 PM |
| 7:00 PM | 0.5:00 AM |
| 8:00 PM | 1.5:00 AM |
| 9:00 PM | 2.5:00 AM |
| 10:00 PM | 3.5:00 AM |
| 11:00 PM | 4.5:00 AM |
Questions
How many hours ahead is IST of GMT?
IST is 5½ hours ahead of GMT all year.
What time is 12:00 PM GMT in IST?
Noon GMT is 5.5:00 PM IST.
Does daylight saving change this conversion?
No — neither zone observes daylight saving.