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BlogHow it works

KST to IST Converter

Choose a Seoul time to get the time in Delhi, Mumbai, Chennai or Bengaluru. Both countries keep one offset all year, so the gap is fixed.

Korea Standard Time

KSTKorea Standard Time

ISTIndia Standard Time

––:––

KST to IST at a glance

  1. 1Seoul is 3 h 30 min ahead of India, all year.
  2. 2Subtract 3:30 from a Korea time to get India time.
  3. 3Neither side changes its clocks, so the table below works for any date.
  4. 4About five working hours overlap each day.

Seoul to India hour table

KST timeIST time
12:00 AM8:30 PM−1 previous day
1:00 AM9:30 PM−1 previous day
2:00 AM10:30 PM−1 previous day
3:00 AM11:30 PM−1 previous day
4:00 AM12:30 AM
5:00 AM1:30 AM
6:00 AM2:30 AM
7:00 AM3:30 AM
8:00 AM4:30 AM
9:00 AM5:30 AM
10:00 AM6:30 AM
11:00 AM7:30 AM
12:00 PM8:30 AM
1:00 PM9:30 AM
2:00 PM10:30 AM
3:00 PM11:30 AM
4:00 PM12:30 PM
5:00 PM1:30 PM
6:00 PM2:30 PM
7:00 PM3:30 PM
8:00 PM4:30 PM
9:00 PM5:30 PM
10:00 PM6:30 PM
11:00 PM7:30 PM
Each Seoul hour with the India time beside it. India's 9:00 AM to 5:00 PM sits between 12:30 PM and 8:30 PM in Seoul.

Why the result ends in :30

Korea Standard Time is a whole-hour zone, UTC+9. India Standard Time is UTC+5:30, a half-hour zone chosen to fit the country's central meridian at 82.5° east. Any conversion between the two therefore lands on the half hour: 10:00 AM in Seoul is 6:30 AM in India, never 6:00 or 7:00.

The offsets come from the IANA time zone database, the same data your phone uses, and neither has a scheduled clock change.

Planning work between Korea and India

Korean offices often start at 9:00 AM, which is 5:30 AM in India, so the Korean morning is quiet on the Indian side. Things line up after lunch in Seoul: from 1:00 PM KST, Indian teams are at their desks, and the overlap runs until the Korean day ends around 6:00 PM, or 2:30 PM in India.

For electronics and automotive supply chains that link the two countries, that means questions sent from Seoul in the morning get answers in the Korean afternoon.

Japan gives the same numbers, see JST to IST. The Seoul and Delhi clocks show both sides live.

KST to IST questions

How many hours is Korea ahead of India?

Korea is 3 hours 30 minutes ahead of India on every date.

If it is 11:00 AM in Seoul, what time is it in India?

It is 7:30 AM in India the same day.

Do Korea or India use daylight saving time?

Neither does. Korea stays on UTC+9 and India on UTC+5:30 all year.

What are good meeting hours between Seoul and Chennai?

1:00 PM to 6:00 PM in Seoul, which is 9:30 AM to 2:30 PM in India.

Is the Korea–India gap the same as Japan–India?

Yes. Japan also uses UTC+9, so Tokyo and Seoul are both 3 h 30 min ahead of India.