Korea Standard Time (kst) is used in South Korea. The IANA timezone identifier is Asia/Seoul.

India Standard Time (ist) is used in India. The IANA timezone identifier is Asia/Kolkata.

KST to IST Time Converter

Korea Standard Time → India Standard Time

KST = UTC+9IST = UTC+5:30

⚠️ IST is ambiguous — on this page it means India Standard Time. It also refers to:

KST → Ireland Standard Time (Dublin) ↗KST → Israel Standard Time (Jerusalem) ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

IST (Mumbai)

India · -3.5h

05:30

London

United Kingdom · -8h

01:00

New York

USA · -13h

20:00-1 day

Tokyo

Japan · UTC±0

09:00

Dubai

United Arab Emirates · -5h

04:00

KST (Seoul) to IST (Mumbai) — exact time difference

KST (Seoul) is 3 hours 30 minutes ahead of IST (Mumbai). Midday in KST (Seoul) lines up with 08:00 in IST (Mumbai).

KST (Seoul) runs on Asia/Seoul; IST (Mumbai) runs on Asia/Kolkata. Together they are 3.5 hours 30 minutes apart.

Working hours overlap

There is a 4.5-hour window each day where both KST (Seoul) and IST (Mumbai) are within standard business hours (09:00–17:00).

00:0006:0012:0018:0024:00

KST (Seoul)

IST (Mumbai)

Overlap (4.5h)

Best times to schedule a meeting

There is a 4.5-hour daily window where both locations are in business hours. The 3 best slots are listed below.

13:00 Seoul / 09:00 Mumbai✓ Both working

14:00 Seoul / 10:00 Mumbai✓ Both working

15:00 Seoul / 11:00 Mumbai✓ Both working

Working hours defined as 09:00–17:00 local time for each location.

Upcoming public holidays

KST (Seoul)7 holidays

Aug 15Liberation Day

Sep 24Chuseok

Sep 25Chuseok

Sep 26Chuseok

Oct 3National Foundation Day

IST (Mumbai)

No upcoming public holidays this year.

How to work with KST (Seoul) and IST (Mumbai) time zones

The 3.5-hour gap between KST (Seoul) (South Korea) and IST (Mumbai) (India) requires some planning — but a 4.5-hour daily overlap means both teams can connect in real time without unusual scheduling.

💡 How to schedule across these time zones

✅

If you are in KST (Seoul), aim for 13:00–14:00, which corresponds to 09:00–10:00 in IST (Mumbai) — both teams are within working hours.

✅

If you are in KST (Seoul), aim for 14:00–15:00, which corresponds to 10:00–11:00 in IST (Mumbai) — both teams are within working hours.

✅

If you are in KST (Seoul), aim for 15:00–16:00, which corresponds to 11:00–12:00 in IST (Mumbai) — both teams are within working hours.

Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.

Add to your browser — Free →

Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am KST (Seoul)".

KST (Seoul) ↔ IST (Mumbai)

4h of business hours overlap daily (09:00–17:00)

KST (Seoul)

IST (Mumbai)