Chennai to IST to London Time Converter
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Quick answers
Selected conversion
5:30 pm17:30 IST (UTC+5:30), Oct 18, 2026 = 5:30 pm17:30 IST (UTC+5:30), Oct 18, 2026 = 1:00 pm13:00 BST (UTC+1), Oct 18, 2026
Chennai and IST have the same local time. Chennai is 4 hours and 30 minutes ahead of London.
How the time difference changes
Chennai to IST
Chennai and IST have the same time year-round.
Working hours of 9:00 am to 6:00 pm in Chennai correspond to 9:00 am to 6:00 pm in IST.Working hours of 09:00 to 18:00 in Chennai correspond to 09:00 to 18:00 in IST.
Chennai to London
For most of the year, Chennai is 4 hours and 30 minutes ahead of London. From Oct 25, 2026 to Mar 28, 2027, Chennai is 5 hours and 30 minutes ahead of London.
For most of the year, working hours of 9:00 am to 6:00 pm in Chennai correspond to 4:30 am to 1:30 pm in London. At other times of the year, working hours of 9:00 am to 6:00 pm in Chennai correspond to 3:30 am to 12:30 pm in London.For most of the year, working hours of 09:00 to 18:00 in Chennai correspond to 04:30 to 13:30 in London. At other times of the year, working hours of 09:00 to 18:00 in Chennai correspond to 03:30 to 12:30 in London.
Compare Chennai time with IST and London time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
IST (India Standard Time) and India Standard Time have the same local time. IST (India Standard Time) is 4 hours and 30 minutes ahead of BST (British Summer Time).
5:30 pm17:30 in Chennai, India is 5:30 pm17:30 in IST and is 1:00 pm13:00 in London, United Kingdom
Chennai to IST call time
Best time for a conference call or a meeting is between 9am-6pm09:00-18:00 in Chennai which corresponds to 9am-6pm09:00-18:00 in IST
Chennai to London call time
Best time for a conference call or a meeting is between 1:30pm-6pm13:30-18:00 in Chennai which corresponds to 9am-1:30pm09:00-13:30 in London
5:30 pm17:30 IST (India Standard Time) (Chennai, India). Offset UTC +5:30 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
1:00 pm13:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
5:30 pm17:30 Chennai, India / 5:30 pm17:30 IST / 1:00 pm13:00 London, United Kingdom
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| Chennai, India | IST | London, United Kingdom |
|---|---|---|
| 12:00am | 7:30pm previous day | |
| 1:00am | 8:30pm previous day | |
| 2:00am | 9:30pm previous day | |
| 3:00am | 10:30pm previous day | |
| 4:00am | 11:30pm previous day | |
| 5:00am | 12:30am | |
| 6:00am | 1:30am | |
| 7:00am | 2:30am | |
| 8:00am | 3:30am | |
| 9:00am | 4:30am | |
| 10:00am | 5:30am | |
| 11:00am | 6:30am | |
| 12:00pm | 7:30am | |
| 1:00pm | 8:30am | |
| 2:00pm | 9:30am | |
| 3:00pm | 10:30am | |
| 4:00pm | 11:30am | |
| 5:00pm | 12:30pm | |
| 6:00pm | 1:30pm | |
| 7:00pm | 2:30pm | |
| 8:00pm | 3:30pm | |
| 9:00pm | 4:30pm | |
| 10:00pm | 5:30pm | |
| 11:00pm | 6:30pm | |
| 00:00 | 19:30 previous day | |
| 01:00 | 20:30 previous day | |
| 02:00 | 21:30 previous day | |
| 03:00 | 22:30 previous day | |
| 04:00 | 23:30 previous day | |
| 05:00 | 00:30 | |
| 06:00 | 01:30 | |
| 07:00 | 02:30 | |
| 08:00 | 03:30 | |
| 09:00 | 04:30 | |
| 10:00 | 05:30 | |
| 11:00 | 06:30 | |
| 12:00 | 07:30 | |
| 13:00 | 08:30 | |
| 14:00 | 09:30 | |
| 15:00 | 10:30 | |
| 16:00 | 11:30 | |
| 17:00 | 12:30 | |
| 18:00 | 13:30 | |
| 19:00 | 14:30 | |
| 20:00 | 15:30 | |
| 21:00 | 16:30 | |
| 22:00 | 17:30 | |
| 23:00 | 18:30 |
Chennai Time Zone and Facts
Time Zone
Chennai Facts
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bengaluru, Hyderabad, Ahmedabad.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
Current time in India: India time now
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
London Time Zone and Facts
Time Zone
GMT – Greenwich Mean Time, UTC+0 (standard time)