Convert India Standard Time (IST) to UK time (GMT/BST), with daylight saving applied for the exact date you pick.
Tue, Oct 27
Tue, Oct 27 Same day
| Su | Mo | Tu | We | Th | Fr | Sa |
|---|
IST 9 to 5 GMT 9 to 5
GMT is 5 hours 30 minutes behind IST.
The same conversion works for every city on these clocks, such as India to London, India to England and Delhi to London.
Shaded areas follow the official zone boundaries, so a country split across zones is split here too. Hover or tap a region for its local time.
Every hour of Tuesday, October 27, 2026, side by side. Days with a clock change show 23 or 25 rows.
Shaded rows fall inside working hours in both places.
| New Delhi (IST) | London (GMT) | Working hours |
|---|---|---|
| 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 | Both working |
| 4:00 PM | 10:30 AM | Both working |
| 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 |
Every hour of the India Standard Time day, plus the common half hours, and their UK time equivalents. The second column covers the part of the year when the clocks are on a different gap.
| India Standard Time | BST 4 h 30 min behind, most of the year (210 days in 2026) | GMT 5 h 30 min behind, about 22 weeks in 2026 |
|---|---|---|
| 12:00 AM | 7:30 PM (previous day) | 6:30 PM (previous day) |
| 1:00 AM | 8:30 PM (previous day) | 7:30 PM (previous day) |
| 2:00 AM | 9:30 PM (previous day) | 8:30 PM (previous day) |
| 3:00 AM | 10:30 PM (previous day) | 9:30 PM (previous day) |
| 4:00 AM | 11:30 PM (previous day) | 10:30 PM (previous day) |
| 5:00 AM | 12:30 AM | 11:30 PM (previous day) |
| 6:00 AM | 1:30 AM | 12:30 AM |
| 7:00 AM | 2:30 AM | 1:30 AM |
| 8:00 AM | 3:30 AM | 2:30 AM |
| 9:00 AM | 4:30 AM | 3:30 AM |
| 9:30 AM | 5:00 AM | 4:00 AM |
| 10:00 AM | 5:30 AM | 4:30 AM |
| 10:30 AM | 6:00 AM | 5:00 AM |
| 11:00 AM | 6:30 AM | 5:30 AM |
| 11:30 AM | 7:00 AM | 6:00 AM |
| 12:00 PM | 7:30 AM | 6:30 AM |
| 12:30 PM | 8:00 AM | 7:00 AM |
| 1:00 PM | 8:30 AM | 7:30 AM |
| 1:30 PM | 9:00 AM | 8:00 AM |
| 2:00 PM | 9:30 AM | 8:30 AM |
| 2:30 PM | 10:00 AM | 9:00 AM |
| 3:00 PM | 10:30 AM | 9:30 AM |
| 3:30 PM | 11:00 AM | 10:00 AM |
| 4:00 PM | 11:30 AM | 10:30 AM |
| 4:30 PM | 12:00 PM | 11:00 AM |
| 5:00 PM | 12:30 PM | 11:30 AM |
| 5:30 PM | 1:00 PM | 12:00 PM |
| 6:00 PM | 1:30 PM | 12:30 PM |
| 7:00 PM | 2:30 PM | 1:30 PM |
| 8:00 PM | 3:30 PM | 2:30 PM |
| 9:00 PM | 4:30 PM | 3:30 PM |
| 10:00 PM | 5:30 PM | 4:30 PM |
| 11:00 PM | 6:30 PM | 5:30 PM |
Each row is a stretch of days with one constant difference, split at every clock change.
| Dates | IST | UK time | Difference |
|---|---|---|---|
| Thu, Jan 1, 2026 until Sun, Mar 29, 2026 | IST | GMT | GMT 5 h 30 min behind |
| Sun, Mar 29, 2026 until Sun, Oct 25, 2026 | IST | BST | BST 4 h 30 min behind |
| Sun, Oct 25, 2026 until Sun, Mar 28, 2027 | IST | GMT | GMT 5 h 30 min behind |
| Sun, Mar 28, 2027 until Sun, Oct 31, 2027 | IST | BST | BST 4 h 30 min behind |
| Sun, Oct 31, 2027 until Sat, Jan 1, 2028 | IST | GMT | GMT 5 h 30 min behind |
India Standard Time is UTC+5:30 all year. The whole country keeps a single clock, and India has not observed daylight saving time since the 1940s, so IST never changes.
IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).
UK time is Greenwich Mean Time (GMT, UTC+0) in winter and British Summer Time (BST, UTC+1) from the last Sunday in March to the last Sunday in October.
BST is 4 hours 30 minutes behind IST for most of the year (210 days in 2026). The gap is 5 hours 30 minutes for about 22 weeks in 2026.
London uses UK time. BST is 4 hours 30 minutes behind IST for most of the year (210 days in 2026). The gap is 5 hours 30 minutes for about 22 weeks in 2026. Type any IST time into the IST to UK time converter to see the London time for any date.
9:00 AM IST is 4:30 AM BST for most of the year (210 days in 2026). 9:00 AM IST is 3:30 AM GMT for about 22 weeks in 2026.
12:00 PM IST is 7:30 AM BST for most of the year (210 days in 2026). 12:00 PM IST is 6:30 AM GMT for about 22 weeks in 2026.
10:00 AM IST is 5:30 AM BST for most of the year (210 days in 2026). 10:00 AM IST is 4:30 AM GMT for about 22 weeks in 2026.
5:00 PM IST is 12:30 PM BST for most of the year (210 days in 2026). 5:00 PM IST is 11:30 AM GMT for about 22 weeks in 2026.
No, UK time is behind IST. BST is 4 hours 30 minutes behind IST for most of the year (210 days in 2026). The gap is 5 hours 30 minutes for about 22 weeks in 2026.
Working days of 9 AM to 5 PM overlap from 1:30 PM to 5:00 PM IST, which is 9:00 AM to 12:30 PM BST while IST and BST apply.
UK time changes its clocks twice a year; India Standard Time does not. The next change is on Sunday, March 28, 2027 in UK time.
IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).