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Global ClockTime zone converter & meeting planner
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AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Chennai vs London

Chennai keeps IST (UTC+5:30) and London keeps BST (UTC+1) today. London is 4½ hours behind Chennai; the rows below read both clocks live.

The working day, side by side

Hours shaded in both rows are inside working hours in both cities: 09:00–14:00 in London (13:00–18:00 your time).

Chennai and London hour by hour, with the working-hour overlap shaded
City00:00 in Chennai01:00 in Chennai02:00 in Chennai03:00 in Chennai04:00 in Chennai05:00 in Chennai06:00 in Chennai07:00 in Chennai08:00 in Chennai09:00 in Chennai10:00 in Chennai11:00 in Chennai12:00 in Chennai13:00 in Chennai14:00 in Chennai15:00 in Chennai16:00 in Chennai17:00 in Chennai18:00 in Chennai19:00 in Chennai20:00 in Chennai21:00 in Chennai22:00 in Chennai23:00 in Chennai
Chennai——000102030405060708091011121314151617181920212223
London——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Chennai and London

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Chennai, London and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

13:00 in Chennai
Inside working hours on both sides
09:00 in London
14:00 in Chennai
Inside working hours on both sides
10:00 in London
15:00 in Chennai
Inside working hours on both sides
11:00 in London
16:00 in Chennai
Inside working hours on both sides
12:00 in London

Where daylight saving pulls them apart

London next changes on Sunday 25 October 2026. Between those two dates the gap between the cities is an hour different from the one shown above — which is exactly when a recurring meeting drifts. Every date we track is on the daylight saving page.

Also useful

Common questions

How many hours ahead is London of Chennai?

London is 4½ hours behind Chennai right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Chennai and London?

Any hour in 13:00–18:00 Chennai time is inside working hours in both cities.

Do Chennai and London change clocks on the same date?

Only one of them does, so the gap between them changes twice a year even though neither city moved relative to the sun.