Seattle to South Korea time conversion
South Korea is 16 hours ahead of Seattle. After the next clock change (): South Korea is 17 hours ahead of Seattle.
Time difference with your location
Seattle is 7 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in Seattle to convert it to South Korea on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · Seattle → South Korea
This table converts each hour in Seattle to South Korea on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| Seattle | South Korea | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 16:004:00 PM | |
| 01:001:00 AM | 17:005:00 PM | |
| 02:002:00 AM | 18:006:00 PM | |
| 03:003:00 AM | 19:007:00 PM | |
| 04:004:00 AM | 20:008:00 PM | |
| 05:005:00 AM | 21:009:00 PM | |
| 06:006:00 AM | 22:0010:00 PM | |
| 07:007:00 AM | 23:0011:00 PM | |
| 08:008:00 AM | 00:0012:00 AM +1 day | |
| 09:009:00 AM | 01:001:00 AM +1 day | |
| 10:0010:00 AM | 02:002:00 AM +1 day | |
| 11:0011:00 AM | 03:003:00 AM +1 day | |
| 12:0012:00 PM | 04:004:00 AM +1 day | |
| 13:001:00 PM | 05:005:00 AM +1 day | |
| 14:002:00 PM | 06:006:00 AM +1 day | |
| 15:003:00 PM | 07:007:00 AM +1 day | |
| 16:004:00 PM | 08:008:00 AM +1 day | ✓ |
| 17:005:00 PM | 09:009:00 AM +1 day | ✓ |
| 18:006:00 PM | 10:0010:00 AM +1 day | |
| 19:007:00 PM | 11:0011:00 AM +1 day | |
| 20:008:00 PM | 12:0012:00 PM +1 day | |
| 21:009:00 PM | 13:001:00 PM +1 day | |
| 22:0010:00 PM | 14:002:00 PM +1 day | |
| 23:0011:00 PM | 15:003:00 PM +1 day |
Quick conversion examples
These examples convert local times in Seattle to South Korea on 2026-10-21.
Conversion formula: South Korea = Seattle + 16h · Seattle + 17h.
| Seattle | South Korea |
|---|---|
| 6:00 AM Seattle | = 10:00 PM South Korea |
| 7:00 AM Seattle | = 11:00 PM South Korea |
| 8:00 AM Seattle | = 12:00 AM South Korea (+1 day) |
| 9:00 AM Seattle | = 1:00 AM South Korea (+1 day) |
| 10:00 AM Seattle | = 2:00 AM South Korea (+1 day) |
| 12:00 PM Seattle | = 4:00 AM South Korea (+1 day) |
| 3:00 PM Seattle | = 7:00 AM South Korea (+1 day) |
| 5:00 PM Seattle | = 9:00 AM South Korea (+1 day) |
| 6:00 PM Seattle | = 10:00 AM South Korea (+1 day) |
| 8:00 PM Seattle | = 12:00 PM South Korea (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working day in Seattle and South Korea overlaps for 2 hours on 2026-10-21.
- Shared working hours
- 16:00–18:00 Seattle · 08:00–10:00 South Korea
Clock changes on both sides, 2026–2028
Seattle and South Korea have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | Seattle | South Korea |
|---|---|---|
| 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, South Korea is 17 hours ahead of Seattle. The difference changes during the following periods.
- From 2026-03-08 03:00 Seattle until 2026-11-01 01:00 Seattle, South Korea is 16 hours ahead of Seattle.
- From 2027-03-14 03:00 Seattle until 2027-11-07 01:00 Seattle, South Korea is 16 hours ahead of Seattle.
- From 2028-03-12 03:00 Seattle until 2028-11-05 01:00 Seattle, South Korea is 16 hours ahead of Seattle.
Frequently asked questions
What time is 9 AM Seattle in South Korea?
9:00 AM Seattle = 1:00 AM South Korea (+1 day), using UTC-7 and UTC+9. Choose a date above for the seasonal local time.
Does the time difference between Seattle and South Korea change during the year?
Yes. During 2026–2028: South Korea is 16 hours ahead of Seattle; South Korea is 17 hours ahead of Seattle. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in South Korea?
Read the South Korea 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 Seattle and South Korea?
The shared 08:00–18:00 working window is 16:00–18:00 Seattle / 08:00–10:00 South Korea, a total of 2 hours.
What is the time difference between Seattle and South Korea now?
Right now, South Korea is 16 hours ahead of Seattle. Conversion formula: South Korea = Seattle + 16h · Seattle + 17h.