IST to GMT
On Oct 23, 2026, UK time is 4 hours 30 minutes behind India Standard Time: 9:00 AM IST is 4:30 AM BST. The gap changes during the year because of daylight saving time; the dates are below.
GMT vs IST over the next 12 months
| Period | GMT is | Example |
|---|---|---|
| Oct 23, 2026 to Oct 25, 2026 | 4 hours 30 minutes behind | 9:00 AM IST = 4:30 AM BST |
| Oct 25, 2026 to Mar 28, 2027 | 5 hours 30 minutes behind | 9:00 AM IST = 3:30 AM GMT |
| Mar 28, 2027 onwards | 4 hours 30 minutes behind | 9:00 AM IST = 4:30 AM BST |
IST to GMT conversion table
Every hour of a weekday around Oct 23, 2026, in both zones.
| India Standard Time | UK time |
|---|---|
| 12:00 AM | 6:30 PM (previous day) |
| 1:00 AM | 7:30 PM (previous day) |
| 2:00 AM | 8:30 PM (previous day) |
| 3:00 AM | 9:30 PM (previous day) |
| 4:00 AM | 10:30 PM (previous day) |
| 5:00 AM | 11:30 PM (previous 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 for a meeting
Normal 9-to-5 working hours overlap for 2 hours 30 minutes on a weekday: 2:30 PM–5:00 PM IST, which is 9:00 AM–11:30 AM GMT.
Comparing more than two places? The meeting planner lines up working hours for up to six cities.
Daylight saving time
UK time (GMT/BST)
- Oct 25, 2026: clocks go back 1 hour at 2:00 AM (UTC+1 → UTC±0)
- Mar 28, 2027: clocks go forward 1 hour at 1:00 AM (UTC±0 → UTC+1)
Where these clocks are used
- India Standard Time (IST): all of India: Mumbai, Delhi, Bengaluru, Chennai. IANA zone
Asia/Kolkata. - UK time (GMT/BST): London, Edinburgh, Dublin and Lisbon keep the same clock. IANA zone
Europe/London.
Questions
What time is it in GMT when it is 9 AM IST?
On Oct 23, 2026, 9:00 AM IST is 4:30 AM BST. On other dates the answer can shift by an hour because of daylight saving time; the table of periods on this page gives each one.
How many hours behind IST is GMT?
It depends on the date. Oct 23, 2026 to Oct 25, 2026: GMT is 4 hours 30 minutes behind. Oct 25, 2026 to Mar 28, 2027: GMT is 5 hours 30 minutes behind. Mar 28, 2027 onwards: GMT is 4 hours 30 minutes behind.
Do IST and GMT observe daylight saving time?
India Standard Time stays on UTC+5:30 all year. UK time switches to BST (UTC+1) in summer and back to GMT (UTC±0) in winter.
What is the best time for a meeting between IST and GMT?
Normal 9-to-5 working hours overlap for 2 hours 30 minutes on a weekday: 2:30 PM–5:00 PM IST, which is 9:00 AM–11:30 AM GMT.
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Related conversions
- GMT to IST (reverse)
- EST to GMT
- CST to GMT
- MST to GMT
- PST to GMT
- UTC to GMT
- CET to GMT
- IST to EST
- IST to CST
- IST to MST
- IST to PST
- IST to UTC
- All time zones
Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.