KST to EST: KST is 13 hours ahead of EST
Korea Standard Time is 13 hours ahead of Eastern Time right now. It is 12:21 pm KST in Korea and 11:21 pm EDT in Eastern, which is already the previous day there.
Convert a specific time from KST to EST
Pick any time and date to convert it both ways. The conversion runs in your browser against the real zone rules, so a date inside a daylight saving period gets that period's offset rather than today's.
What is the time difference between KST and EST?
Eastern Time is 13 hours behind Korea Standard Time. To go from KST to EST you subtract 13 hours. That gap is not fixed. Across 2026 the distance between these two zones takes 2 different values, from 13 hours to 14 hours, because Eastern moves its clocks and Korea does not. This page recomputes it rather than assuming.
KST to EST conversion table
Every hour of Friday, September 25, 2026 in Korea, with the matching reading in Eastern. 13 of the 24 hours land on a different calendar date in Eastern, which is the part people get wrong when they schedule across this pair.
| KST | KST 24h | EST | EST 24h | Date |
|---|---|---|---|---|
| 12:00 am | 00:00 | 11:00 am | 11:00 | the previous day |
| 1:00 am | 01:00 | 12:00 pm | 12:00 | the previous day |
| 2:00 am | 02:00 | 1:00 pm | 13:00 | the previous day |
| 3:00 am | 03:00 | 2:00 pm | 14:00 | the previous day |
| 4:00 am | 04:00 | 3:00 pm | 15:00 | the previous day |
| 5:00 am | 05:00 | 4:00 pm | 16:00 | the previous day |
| 6:00 am | 06:00 | 5:00 pm | 17:00 | the previous day |
| 7:00 am | 07:00 | 6:00 pm | 18:00 | the previous day |
| 8:00 am | 08:00 | 7:00 pm | 19:00 | the previous day |
| 9:00 am | 09:00 | 8:00 pm | 20:00 | the previous day |
| 10:00 am | 10:00 | 9:00 pm | 21:00 | the previous day |
| 11:00 am | 11:00 | 10:00 pm | 22:00 | the previous day |
| 12:00 pm | 12:00 | 11:00 pm | 23:00 | the previous day |
| 1:00 pm | 13:00 | 12:00 am | 00:00 | same day |
| 2:00 pm | 14:00 | 1:00 am | 01:00 | same day |
| 3:00 pm | 15:00 | 2:00 am | 02:00 | same day |
| 4:00 pm | 16:00 | 3:00 am | 03:00 | same day |
| 5:00 pm | 17:00 | 4:00 am | 04:00 | same day |
| 6:00 pm | 18:00 | 5:00 am | 05:00 | same day |
| 7:00 pm | 19:00 | 6:00 am | 06:00 | same day |
| 8:00 pm | 20:00 | 7:00 am | 07:00 | same day |
| 9:00 pm | 21:00 | 8:00 am | 08:00 | same day |
| 10:00 pm | 22:00 | 9:00 am | 09:00 | same day |
| 11:00 pm | 23:00 | 10:00 am | 10:00 | same day |
What are the best hours to schedule a call between KST and EST?
No hour of the standard 9:00 am to 5:00 pm working day falls inside working hours on both sides. Korea and Eastern are 13 hours apart, which is too far for an overlap, so somebody has to take a call outside their own working day. The least painful options are below, ranked by how close both sides sit to the middle of the afternoon.
| KST | EST | Working hours | Note |
|---|---|---|---|
| 7:00 am | 6:00 pm the previous day | neither side | early morning in Korea, evening in Eastern |
| 8:00 am | 7:00 pm the previous day | neither side | mid morning in Korea, evening in Eastern |
Does daylight saving change KST to EST?
Korea Standard Time does not move its clocks at all, so its UTC+9 offset holds every day of the year.
Eastern Time is currently on EDT and changes next on Sunday, November 1, 2026, when the clock falls back from 1:59 am to 1:00 am and the offset moves from UTC-4 to UTC-5.
Because the two sides do not move together, the answer to this conversion changes during the year. For part of the year the gap is 13 hours and for the rest it is 14 hours. The table above is built for today, not for an average day.
Is KST ahead of or behind EST?
KST is ahead of EST by 13 hours: when it is 12:00 pm in Korea, it is 11:00 pm the previous day in Eastern. One wrinkle worth knowing: EST and EDT are two names for the same zone, not two zones. Eastern Time reads EST in winter and EDT in summer. When somebody types "kst to est" they nearly always mean the zone rather than the literal winter offset, so this page resolves KST to Asia/Seoul and EST to America/New_York and applies whichever offset is genuinely in force on the day.
Korea Standard Time covers Seoul and South Korea. Eastern Time covers New York, Toronto, Atlanta and Miami. The identifiers behind them are Asia/Seoul and America/New_York, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.
Questions
- What is KST in EST?
- KST is 13 hours ahead of EST. 9:00 am KST is 8:00 pm the previous day EST.
- How many hours ahead is EST of KST?
- EST is 13 hours behind KST. That varies across the year, between 13 hours and 14 hours.
- What time is it in Eastern right now?
- 11:21 pm EDT on Thursday, September 24, 2026.
- When can Korea and Eastern meet during working hours?
- There is no shared working hour. The closest fit is 7:00 am KST, which is 6:00 pm EST.
- Does this account for daylight saving?
- Yes. Every reading is computed from the IANA database for the actual date, so KST and EDT are the abbreviations genuinely in force today rather than a fixed assumption.
Other conversions
12 and 24 hour converter · 8 hours from now · Today · Day counter