GMT to IST converter
India Standard Time (IST) is 5 hours 30 minutes ahead of Greenwich Mean Time (GMT), all year round.
Greenwich Mean Time · GMT
9:01 AM
Sunday 25 October
India Standard Time · IST
2:31 PM
Sunday 25 October
Right now, India Standard Time is 5 hours 30 minutes ahead of Greenwich Mean Time. Updates live from your device’s clock.
Hour by hour
Today’s conversion. Green dots mark 9-to-5 working hours.
| GMT | IST |
|---|---|
| 12:00 AM | 5:30 AM |
| 1:00 AM | 6:30 AM |
| 2:00 AM | 7:30 AM |
| 3:00 AM | 8:30 AM |
| 4:00 AM | 9:30 AM |
| 5:00 AM | 10:30 AM |
| 6:00 AM | 11:30 AM |
| 7:00 AM | 12:30 PM |
| 8:00 AM | 1:30 PM |
| 9:00 AM | 2:30 PM |
| 10:00 AM | 3:30 PM |
| 11:00 AM | 4:30 PM |
| 12:00 PM | 5:30 PM |
| 1:00 PM | 6:30 PM |
| 2:00 PM | 7:30 PM |
| 3:00 PM | 8:30 PM |
| 4:00 PM | 9:30 PM |
| 5:00 PM | 10:30 PM |
| 6:00 PM | 11:30 PM |
| 7:00 PM | 12:30 AMnext day |
| 8:00 PM | 1:30 AMnext day |
| 9:00 PM | 2:30 AMnext day |
| 10:00 PM | 3:30 AMnext day |
| 11:00 PM | 4:30 AMnext day |
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).
- 9:00 AM–11:30 AMin GMT=2:30 PM–5:00 PMin IST
When the gap changes
- 25 October 2026 → 1 January 2028IST +5h 30m
GMT is UTC+0 and never changes. The UK uses GMT in winter only; in summer it switches to BST (UTC+1).
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.
Questions
What is the time difference between Greenwich Mean Time and India Standard Time?
India Standard Time is 5 hours 30 minutes ahead of Greenwich Mean Time for most of the year. The gap stays the same all year.
If it's 9 AM in Greenwich Mean Time, what time is it in India Standard Time?
When it's 9:00 AM in Greenwich Mean Time, it's 2:30 PM in India Standard Time. At 5:00 PM in Greenwich Mean Time, it's 10:30 PM in India Standard Time. (Based on today's offsets.)
What is the best time for a call between Greenwich Mean Time and India Standard Time?
Working hours overlap from 9:00 AM to 11:30 AM in Greenwich Mean Time, which is 2:30 PM to 5:00 PM in India Standard Time.
Does Greenwich Mean Time use daylight saving time?
No. Greenwich Mean Time stays on the same offset all year.
Does India Standard Time use daylight saving time?
No. India Standard Time stays on the same offset all year.