TimeToZone

IST to KST Converter

KST is 3 hours 30 minutes ahead of IST. 9:00 AM IST = 12:30 PM KST.

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ISTfrom
India Standard Time
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KST
Korea Standard Time
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KST is 3 hours 30 minutes ahead of IST. To convert IST to KST, add 3 hours 30 minutes to the IST time: 9:00 AM IST = 12:30 PM KST.

IST (India Time) is used in India and Sri Lanka (UTC+5:30, no daylight saving time). KST (Korea Time) is used in South Korea.

IST here means India Standard Time, not Irish or Israel Standard Time.

IST to KST time conversion table

IST to KST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.

ISTKSTDay
12:00 AM IST3:30 AM KSTnight
1:00 AM IST4:30 AM KSTnight
2:00 AM IST5:30 AM KSTnight
3:00 AM IST6:30 AM KST—
4:00 AM IST7:30 AM KST—
5:00 AM IST8:30 AM KST—
6:00 AM IST9:30 AM KST—
7:00 AM IST10:30 AM KST—
8:00 AM IST11:30 AM KST—
9:00 AM IST12:30 PM KSTwork hours
10:00 AM IST1:30 PM KSTwork hours
11:00 AM IST2:30 PM KSTwork hours
12:00 PM IST3:30 PM KSTwork hours
1:00 PM IST4:30 PM KSTwork hours
2:00 PM IST5:30 PM KST—
3:00 PM IST6:30 PM KST—
4:00 PM IST7:30 PM KST—
5:00 PM IST8:30 PM KST—
6:00 PM IST9:30 PM KST—
7:00 PM IST10:30 PM KSTnight
8:00 PM IST11:30 PM KSTnight
9:00 PM IST12:30 AM KSTnext day
10:00 PM IST1:30 AM KSTnext day
11:00 PM IST2:30 AM KSTnext day
  • Work rows — 9 AM–5 PM in both places
  • Night in the destination (10 PM–6 AM)

How to convert IST to KST

Add 3 hours 30 minutes to the IST time to get KST.

Example: 9:00 AM IST = 12:30 PM KST.

Across midnight: 10:00 PM IST = 1:30 AM KST (next day). The date changes, so always check the day as well as the hour.

Time difference between IST and KST

The time difference between IST and KST is 3 hours 30 minutes all year – KST is ahead of IST.

IST and KST during daylight saving time

  • IST does not observe daylight saving time; it stays on UTC+5:30 all year.
  • KST does not observe daylight saving time; it stays on UTC+9 all year.

Best time for a meeting between IST and KST

IST and KST share 4 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 1:30 PM IST lands between 12:30 PM and 5:00 PM KST, inside working hours for both.

Plan a meeting across more time zones.

IST to KST FAQ

What is the time difference between IST and KST?

KST is 3 hours 30 minutes ahead of IST all year. 9:00 AM IST = 12:30 PM KST.

What is 9 AM IST in KST?

9:00 AM IST is 12:30 PM KST.

What is 12 PM (noon) IST in KST?

12:00 PM IST is 3:30 PM KST.

Is KST ahead of or behind IST?

KST is 3 hours 30 minutes ahead of IST, so it is later in KST than in IST.

Does IST change for daylight saving time?

No. IST stays on the same offset all year, so conversions never shift for daylight saving time.

Does KST change for daylight saving time?

No. KST stays on the same offset all year, so conversions never shift for daylight saving time.

What is the best time for a meeting between IST and KST?

IST and KST share 4 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 1:30 PM IST lands between 12:30 PM and 5:00 PM KST, inside working hours for both.

Related conversions

Convert KST to IST

Convert IST to other time zones

Convert other time zones to KST

Learn more

Updated 7 November 2026. Time zone data: IANA tz database.