IST to KST Converter
KST is 3.5 hours ahead of IST.
IST
Friday, October 23, 2026
India Standard Time · UTC+5:30
KST
Friday, October 23, 2026
Korea Standard Time · UTC+9
Convert IST to KST
IST 18:20 = KST 21:50
IST to KST time chart, hour by hour
| IST | KST |
|---|
| 00:00 | 03:30 |
| 01:00 | 04:30 |
| 02:00 | 05:30 |
| 03:00 | 06:30 |
| 04:00 | 07:30 |
| 05:00 | 08:30 |
| 06:00 | 09:30 |
| 07:00 | 10:30 |
| 08:00 | 11:30 |
| 09:00 | 12:30 |
| 10:00 | 13:30 |
| 11:00 | 14:30 |
| 12:00 | 15:30 |
| 13:00 | 16:30 |
| 14:00 | 17:30 |
| 15:00 | 18:30 |
| 16:00 | 19:30 |
| 17:00 | 20:30 |
| 18:00 | 21:30 |
| 19:00 | 22:30 |
| 20:00 | 23:30 |
| 21:00 | 00:30 +1 day |
| 22:00 | 01:30 +1 day |
| 23:00 | 02:30 +1 day |
Highlighted rows fall within 09:00–18:00 in both places: 6 shared working hours.
How many hours is IST behind KST?
As abbreviations, KST is always 3.5 hours ahead of IST: IST is UTC+5:30 and KST is UTC+9. To convert, add 3.5 hours.
Does the IST to KST time difference change?
No. Kst is 3.5 hours ahead of ist all year, because neither place changes its clocks.
Best time for a meeting between IST and KST
- When KST is 3.5 hours ahead of IST: 5 shared office hours, 09:00 to 14:00 in IST (12:30 to 17:30 in KST).
Frequently asked questions about IST and KST time
How many hours ahead is KST of IST?
KST (UTC+9) is 3.5 hours ahead of IST (UTC+5:30).
Does the time difference between IST and KST change during the year?
No, it stays 3.5 hours ahead all year because neither place changes its clocks.