IST to GMT converter
Greenwich Mean Time (GMT) is 5 hours 30 minutes behind India Standard Time (IST), all year round.
India Standard Time · IST
2:31 PM
Sunday 25 October
Greenwich Mean Time · GMT
9:01 AM
Sunday 25 October
Right now, Greenwich Mean Time is 5 hours 30 minutes behind India Standard Time. Updates live from your device’s clock.
Hour by hour
Today’s conversion. Green dots mark 9-to-5 working hours.
| IST | GMT |
|---|---|
| 12:00 AM | 6:30 PMprev day |
| 1:00 AM | 7:30 PMprev day |
| 2:00 AM | 8:30 PMprev day |
| 3:00 AM | 9:30 PMprev day |
| 4:00 AM | 10:30 PMprev day |
| 5:00 AM | 11:30 PMprev 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
When both sides are inside 9 AM–5 PM on a weekday. If there’s no overlap, we show when both are awake (8 AM–9 PM).
- 2:30 PM–5:00 PMin IST=9:00 AM–11:30 AMin GMT
When the gap changes
- 25 October 2026 → 31 December 2027GMT −5h 30m
India Standard Time is UTC+5:30 all year. India doesn't use daylight saving time, so every change in the gap comes from the other side.
GMT is UTC+0 and never changes. The UK uses GMT in winter only; in summer it switches to BST (UTC+1).
Questions
What is the time difference between India Standard Time and Greenwich Mean Time?
Greenwich Mean Time is 5 hours 30 minutes behind India Standard Time for most of the year. The gap stays the same all year.
If it's 9 AM in India Standard Time, what time is it in Greenwich Mean Time?
When it's 9:00 AM in India Standard Time, it's 3:30 AM in Greenwich Mean Time. At 5:00 PM in India Standard Time, it's 11:30 AM in Greenwich Mean Time. (Based on today's offsets.)
What is the best time for a call between India Standard Time and Greenwich Mean Time?
Working hours overlap from 2:30 PM to 5:00 PM in India Standard Time, which is 9:00 AM to 11:30 AM in Greenwich Mean Time.
Does India Standard Time use daylight saving time?
No. India Standard Time stays on the same offset all year.
Does Greenwich Mean Time use daylight saving time?
No. Greenwich Mean Time stays on the same offset all year.