Time in Seoul vs Chennai
Seoul keeps KST (UTC+9) and Chennai keeps IST (UTC+5:30) today. Chennai is 3½ hours behind Seoul; 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: 09:00–15:00 in Chennai (12:00–18:00 your time).
| City | 00:00 in Seoul | 01:00 in Seoul | 02:00 in Seoul | 03:00 in Seoul | 04:00 in Seoul | 05:00 in Seoul | 06:00 in Seoul | 07:00 in Seoul | 08:00 in Seoul | 09:00 in Seoul | 10:00 in Seoul | 11:00 in Seoul | 12:00 in Seoul | 13:00 in Seoul | 14:00 in Seoul | 15:00 in Seoul | 16:00 in Seoul | 17:00 in Seoul | 18:00 in Seoul | 19:00 in Seoul | 20:00 in Seoul | 21:00 in Seoul | 22:00 in Seoul | 23:00 in Seoul |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Chennai—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
- Working hours
- Shoulder
- Night
- Overlap
Do more with Seoul and Chennai
Best hours to call
12:00 in Seoul
Inside working hours on both sides
09:00 in Chennai
13:00 in Seoul
Inside working hours on both sides
10:00 in Chennai
14:00 in Seoul
Inside working hours on both sides
11:00 in Chennai
15:00 in Seoul
Inside working hours on both sides
12:00 in Chennai
Where daylight saving pulls them apart
Neither Seoul nor Chennai changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Chennai of Seoul?
Chennai is 3½ hours behind Seoul right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Seoul and Chennai?
Any hour in 12:00–18:00 Seoul time is inside working hours in both cities.
Do Seoul and Chennai change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.