World Timezones

Chennai to London Converter

Compare London to Chennai instead
Chennai8:53 amMon, Jun 8
ChennaiIST
India · UTC+5:30
8:53 amMon, Jun 8
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
LondonBST
ENG, United Kingdom · UTC+1
4:23 amMon, Jun 8
7p
8p
9p
10p
11p
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p

Offset

The time difference between Chennai and London is 4.5 hours.

4.5 hours

Chennai (IST) is ahead of London (BST).

IST: UTC+5:30

BST: UTC+1

London is currently observing daylight saving time; Chennai is not.

When to schedule

Business-hours overlap: 2 PM–5 PM in Chennai (9 AM–12 PM in London).

Both teams are in working hours during this window on weekdays.

Suggested time: 3:00 PM Chennai (10:30 AM London).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

United Kingdom

  • Good FridayFri, Apr 3
  • Early May Bank HolidayMon, May 4
  • Spring Bank HolidayMon, May 25
  • Christmas DayFri, Dec 25
  • St. Stephen's DayMon, Dec 28

About these zones

Chennai uses India Standard Time (IST). To call India, dial +91.

London uses Greenwich Mean Time (GMT, or BST). To call United Kingdom, dial +44.

London is approximately 5,100 miles northwest of Chennai.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

ChennaiLondonDay
12:00 am7:30 pm-1 day
1:00 am8:30 pm-1 day
2:00 am9:30 pm-1 day
3:00 am10:30 pm-1 day
4:00 am11:30 pm-1 day
5:00 am12:30 amSame day
6:00 am1:30 amSame day
7:00 am2:30 amSame day
8:00 am3:30 amSame day
9:00 am4:30 amSame day
10:00 am5:30 amSame day
11:00 am6:30 amSame day
12:00 pm7:30 amSame day
1:00 pm8:30 amSame day
2:00 pm9:30 amSame day
3:00 pm10:30 amSame day
4:00 pm11:30 amSame day
5:00 pm12:30 pmSame day
6:00 pm1:30 pmSame day
7:00 pm2:30 pmSame day
8:00 pm3:30 pmSame day
9:00 pm4:30 pmSame day
10:00 pm5:30 pmSame day
11:00 pm6:30 pmSame day

Daylight saving time

London observes daylight saving time; Chennai does not. The offset between the two zones changes when London transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Chennai
Sunrise
5:43 AM
Sunset
6:35 PM
Day length
12h 52m
London
Sunrise
4:46 AM
Sunset
9:15 PM
Day length
16h 30m

Daylight overlap: 9h 19m — 9:16 AM–6:35 PM in Chennai (4:46 AM–2:05 PM in London). Both locations are in daylight during this window.

Cities in these zones

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in India Standard Time

  • BOM
  • NMI
  • DEL
  • BLR
  • HYD
  • AMD
  • MAA
  • CCU
  • STV
  • PNQ

Airports in Greenwich Mean Time

  • LCY
  • LGW
  • LHR
  • LTN
  • STN
  • BHX
  • EMA
  • GLA
  • PIK
  • LBA

Related conversions

Common conversions

What is 9:00 am Chennai in London?
9:00 am Chennai is 4:30 am London.
What is 12:00 pm Chennai in London?
12:00 pm Chennai is 7:30 am London.
What is 12:30 pm Chennai in London?
12:30 pm Chennai is 8:00 am London.
What is 2:00 pm Chennai in London?
2:00 pm Chennai is 9:30 am London.
What is 5:00 pm Chennai in London?
5:00 pm Chennai is 12:30 pm London.
What is 11:30 pm Chennai in London?
11:30 pm Chennai is 7:00 pm London.