KST to IST/IDT time converter
IST/IDT is 6 hours behind KST. When it is 9:00 AM in KST, it is 3:00 AM in IST/IDT.
4:19 AM in KST, Saturday, October 17, 2026
Shared working hours (9:00–18:00)
KST to IST/IDT conversion table
Every hour of today in KST and the matching time in IST/IDT. Light rows are typical working hours (9:00–18:00).
| KST | IST/IDT |
|---|---|
| 12:00 AM | 6:00 PM−1 day |
| 1:00 AM | 7:00 PM−1 day |
| 2:00 AM | 8:00 PM−1 day |
| 3:00 AM | 9:00 PM−1 day |
| 4:00 AM | 10:00 PM−1 day |
| 5:00 AM | 11:00 PM−1 day |
| 6:00 AM | 12:00 AM |
| 7:00 AM | 1:00 AM |
| 8:00 AM | 2:00 AM |
| 9:00 AM | 3:00 AM |
| 10:00 AM | 4:00 AM |
| 11:00 AM | 5:00 AM |
| 12:00 PM | 6:00 AM |
| 1:00 PM | 7:00 AM |
| 2:00 PM | 8:00 AM |
| 3:00 PM | 9:00 AM |
| 4:00 PM | 10:00 AM |
| 5:00 PM | 11:00 AM |
| 6:00 PM | 12:00 PM |
| 7:00 PM | 1:00 PM |
| 8:00 PM | 2:00 PM |
| 9:00 PM | 3:00 PM |
| 10:00 PM | 4:00 PM |
| 11:00 PM | 5:00 PM |
Best time to call or meet
Both sides are at work from 3:00 PM – 6:00 PM in KST (9:00 AM – 12:00 PM in IST/IDT).
Daylight saving time and the difference
The difference changes during the year because KST and IST/IDT switch clocks on different dates:
- Oct 17, 2026 – Oct 25, 2026: -6h
- Oct 25, 2026 – Mar 26, 2027: -7h
- Mar 26, 2027 – Oct 17, 2027: -6h
More conversions
Questions and answers
What is the time difference between KST and IST/IDT?
IST/IDT is 6 hours behind KST.
What time is it in IST/IDT when it is 9 AM in KST?
When it is 9:00 AM in KST, it is 3:00 AM in IST/IDT.
When is the best time to call IST/IDT from KST?
Both sides are at work from 3:00 PM – 6:00 PM in KST (9:00 AM – 12:00 PM in IST/IDT).
Does the time difference between KST and IST/IDT change?
Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.