EST ↔ KST Time Converter

Korea Standard Time (KST) is 14h ahead of Eastern Standard Time (EST). The offset comes from EST being at UTC-5 / UTC-4 (EDT) and KST at UTC+9. For example, when it is 9:00 AM in New York, it is 11:00 PM in Seoul.

To convert EST to KST, add 14 hours to the EST time. For instance, 12:00 PM EST becomes 2:00 AM KST. For times that cross midnight, remember to adjust the date accordingly — a "+1 Day" or "-1 Day" note in the converter above flags this automatically. You can also just type directly into the converter fields on this page for instant results.

Korea Standard Time (KST) is 14h ahead of Eastern Standard Time (EST). Put the other way, EST is 14h behind of KST. If someone in Seoul says "let's meet at noon," that translates to 10:00 PM in New York.

Eastern Standard Time (EST) is the standard clock time used in regions including New York, Washington DC, Boston, Atlanta. It runs at UTC-5 / UTC-4 (EDT) relative to Coordinated Universal Time (UTC). It observes Daylight Saving Time, advancing clocks by one hour during summer, so the effective offset changes seasonally.

Korea Standard Time (KST) is the standard clock time used in regions including Seoul, Busan, Incheon, Daegu. It runs at UTC+9 relative to Coordinated Universal Time (UTC). It does not observe Daylight Saving Time, so the offset stays fixed all year.

The best window for meetings between EST and KST is when standard business hours (9 AM – 6 PM) overlap in both zones. Given that KST is 14h ahead of EST, mornings in the earlier zone tend to align with afternoons in the later zone. Refer to the meeting hours table above to find the exact windows that fall within working hours for both sides. Avoid scheduling calls where one side falls before 7 AM or after 9 PM — those hours are shaded in the table.

Simply type a time into the KST field in the bidirectional converter above — it works equally well in both directions and updates the EST result instantly. Alternatively, subtract 14 hours from the KST time to get the EST equivalent. You can also visit the reverse page: KST to EST converter.

Yes, for some hours they do. Whenever a converted time crosses midnight, the converter above displays a "+1 Day" or "-1 Day" indicator next to the result. The 24-hour table on this page also shows the day change in the Day column. Always check this when scheduling across these two zones to avoid date confusion in calendar invites.

Eastern Standard Time (EST) is used by cities and regions including: New York, Washington DC, Boston, Atlanta, Miami, Philadelphia, Toronto. The zone covers UTC-5 / UTC-4 (EDT)and shifts during Daylight Saving Time.

Korea Standard Time (KST) is observed in cities and regions including: Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju, Suwon. It runs at UTC+9, remaining constant throughout the year.

Yes. EST observes Daylight Saving Time and shifts clocks by one hour seasonally. When only one zone is in DST, the gap between the two changes by one hour. The live clocks and converter on this page use the IANA timezone database and adjust automatically, so you always see the current accurate offset without needing to track DST manually.