EST to KST: EST is 13 hours behind KST
Eastern Time is 13 hours behind Korea Standard Time right now. It is 11:21 pm EDT in Eastern and 12:21 pm KST in Korea, which is already the next day there.
Convert a specific time from EST to KST
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 EST and KST?
Korea Standard Time is 13 hours ahead of Eastern Time. To go from EST to KST you add 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.
EST to KST conversion table
Every hour of Thursday, September 24, 2026 in Eastern, with the matching reading in Korea. 13 of the 24 hours land on a different calendar date in Korea, which is the part people get wrong when they schedule across this pair.
| EST | EST 24h | KST | KST 24h | Date |
|---|---|---|---|---|
| 12:00 am | 00:00 | 1:00 pm | 13:00 | same day |
| 1:00 am | 01:00 | 2:00 pm | 14:00 | same day |
| 2:00 am | 02:00 | 3:00 pm | 15:00 | same day |
| 3:00 am | 03:00 | 4:00 pm | 16:00 | same day |
| 4:00 am | 04:00 | 5:00 pm | 17:00 | same day |
| 5:00 am | 05:00 | 6:00 pm | 18:00 | same day |
| 6:00 am | 06:00 | 7:00 pm | 19:00 | same day |
| 7:00 am | 07:00 | 8:00 pm | 20:00 | same day |
| 8:00 am | 08:00 | 9:00 pm | 21:00 | same day |
| 9:00 am | 09:00 | 10:00 pm | 22:00 | same day |
| 10:00 am | 10:00 | 11:00 pm | 23:00 | same day |
| 11:00 am | 11:00 | 12:00 am | 00:00 | the next day |
| 12:00 pm | 12:00 | 1:00 am | 01:00 | the next day |
| 1:00 pm | 13:00 | 2:00 am | 02:00 | the next day |
| 2:00 pm | 14:00 | 3:00 am | 03:00 | the next day |
| 3:00 pm | 15:00 | 4:00 am | 04:00 | the next day |
| 4:00 pm | 16:00 | 5:00 am | 05:00 | the next day |
| 5:00 pm | 17:00 | 6:00 am | 06:00 | the next day |
| 6:00 pm | 18:00 | 7:00 am | 07:00 | the next day |
| 7:00 pm | 19:00 | 8:00 am | 08:00 | the next day |
| 8:00 pm | 20:00 | 9:00 am | 09:00 | the next day |
| 9:00 pm | 21:00 | 10:00 am | 10:00 | the next day |
| 10:00 pm | 22:00 | 11:00 am | 11:00 | the next day |
| 11:00 pm | 23:00 | 12:00 pm | 12:00 | the next day |
What are the best hours to schedule a call between EST and KST?
No hour of the standard 9:00 am to 5:00 pm working day falls inside working hours on both sides. Eastern and Korea 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.
| EST | KST | Working hours | Note |
|---|---|---|---|
| 6:00 pm | 7:00 am the next day | neither side | evening in Eastern, early morning in Korea |
| 7:00 pm | 8:00 am the next day | neither side | evening in Eastern, mid morning in Korea |
Does daylight saving change EST to KST?
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.
Korea Standard Time does not move its clocks at all, so its UTC+9 offset holds every day of the year.
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 EST ahead of or behind KST?
EST is behind KST by 13 hours: when it is 12:00 pm in Eastern, it is 1:00 am the next day in Korea. 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 "est to kst" they nearly always mean the zone rather than the literal winter offset, so this page resolves EST to America/New_York and KST to Asia/Seoul and applies whichever offset is genuinely in force on the day.
Eastern Time covers New York, Toronto, Atlanta and Miami. Korea Standard Time covers Seoul and South Korea. The identifiers behind them are America/New_York and Asia/Seoul, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.
Questions
- What is EST in KST?
- EST is 13 hours behind KST. 9:00 am EST is 10:00 pm KST.
- How many hours ahead is KST of EST?
- KST is 13 hours ahead of EST. That varies across the year, between 13 hours and 14 hours.
- What time is it in Korea right now?
- 12:21 pm KST on Friday, September 25, 2026.
- When can Eastern and Korea meet during working hours?
- There is no shared working hour. The closest fit is 6:00 pm EST, which is 7:00 am KST.
- Does this account for daylight saving?
- Yes. Every reading is computed from the IANA database for the actual date, so EDT and KST are the abbreviations genuinely in force today rather than a fixed assumption.
Other conversions
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