United States to KST time conversion
KST is 13 hours ahead of United States. After the next clock change (): KST is 14 hours ahead of United States.
Time difference with your location
United States is 4 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in United States to convert it to KST on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · United States → KST
This table converts each hour in United States to KST on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| United States | KST | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 13:001:00 PM | |
| 01:001:00 AM | 14:002:00 PM | |
| 02:002:00 AM | 15:003:00 PM | |
| 03:003:00 AM | 16:004:00 PM | |
| 04:004:00 AM | 17:005:00 PM | |
| 05:005:00 AM | 18:006:00 PM | |
| 06:006:00 AM | 19:007:00 PM | |
| 07:007:00 AM | 20:008:00 PM | |
| 08:008:00 AM | 21:009:00 PM | |
| 09:009:00 AM | 22:0010:00 PM | |
| 10:0010:00 AM | 23:0011:00 PM | |
| 11:0011:00 AM | 00:0012:00 AM +1 day | |
| 12:0012:00 PM | 01:001:00 AM +1 day | |
| 13:001:00 PM | 02:002:00 AM +1 day | |
| 14:002:00 PM | 03:003:00 AM +1 day | |
| 15:003:00 PM | 04:004:00 AM +1 day | |
| 16:004:00 PM | 05:005:00 AM +1 day | |
| 17:005:00 PM | 06:006:00 AM +1 day | |
| 18:006:00 PM | 07:007:00 AM +1 day | |
| 19:007:00 PM | 08:008:00 AM +1 day | |
| 20:008:00 PM | 09:009:00 AM +1 day | |
| 21:009:00 PM | 10:0010:00 AM +1 day | |
| 22:0010:00 PM | 11:0011:00 AM +1 day | |
| 23:0011:00 PM | 12:0012:00 PM +1 day |
Quick conversion examples
These examples use United States (UTC-4) and KST (UTC+9); choosing a date applies the local clock changes.
Conversion formula: KST = United States + 13h · United States + 14h.
| United States | KST |
|---|---|
| 6:00 AM United States | = 7:00 PM KST |
| 7:00 AM United States | = 8:00 PM KST |
| 8:00 AM United States | = 9:00 PM KST |
| 9:00 AM United States | = 10:00 PM KST |
| 10:00 AM United States | = 11:00 PM KST |
| 12:00 PM United States | = 1:00 AM KST (+1 day) |
| 3:00 PM United States | = 4:00 AM KST (+1 day) |
| 5:00 PM United States | = 6:00 AM KST (+1 day) |
| 6:00 PM United States | = 7:00 AM KST (+1 day) |
| 8:00 PM United States | = 9:00 AM KST (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working days in United States and KST do not overlap on 2026-10-21.
Clock changes on both sides, 2026–2028
United States and KST have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | United States | KST |
|---|---|---|
| 2026 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+9 all year. |
| 2027 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+9 all year. |
| 2028 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+9 all year. |
At the start of 2026, KST is 14 hours ahead of United States. The difference changes during the following periods.
- From 2026-03-08 03:00 United States until 2026-11-01 01:00 United States, KST is 13 hours ahead of United States.
- From 2027-03-14 03:00 United States until 2027-11-07 01:00 United States, KST is 13 hours ahead of United States.
- From 2028-03-12 03:00 United States until 2028-11-05 01:00 United States, KST is 13 hours ahead of United States.
Frequently asked questions
What time is 9 AM United States in KST?
9:00 AM United States = 10:00 PM KST, using UTC-4 and UTC+9. Choose a date above for the seasonal local time.
Does the time difference between United States and KST change during the year?
Yes. During 2026–2028: KST is 13 hours ahead of United States; KST is 14 hours ahead of United States. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in KST?
Read the KST clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between United States and KST?
The 08:00–18:00 working days in United States and KST do not overlap.
What is the time difference between United States and KST now?
Right now, KST is 13 hours ahead of United States. Conversion formula: KST = United States + 13h · United States + 14h.