Seoul to Seattle Time Difference
Seattle is 16 hours behind Seoul. When it's 12:47:12 AM in Seoul, it's 08:47:12 AM in Seattle.
How Many Hours Behind Is Seattle From Seoul?
Seattle is 16 hours behind Seoul. So Seoul is 16 hours ahead of Seattle looking the other way — the same gap, described from the other end.
In practice that means a working day in Seoul starts when it is already 5:00 PM the previous day in Seattle. The gap is not fixed all year: it becomes 17 hours on Sunday, November 1, 2026, when Seattle changes its clocks.
Best Time to Call Seoul and Seattle
Standard 9-to-5 hours in Seoul and Seattle never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 2:00 PM in Seoul, which is 3:00 PM to 10:00 PM in Seattle.
both at work Seoul only Seattle only neither — hours shown along the strip are Seoul local time.
Convert a Specific Time
Pick any date and time in Seoul to see the exact equivalent in Seattle.
Common Times Converted
Seoul time on the left, Seattle time on the right.
Seoul to Seattle: Full 24-Hour Conversion Table
Based on today, Monday, October 12, 2026 in Seoul. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Seoul | Seattle | Working hours |
|---|---|---|
| 12:00 AM | 8:00 AM prev day | — |
| 1:00 AM | 9:00 AM prev day | Seattle only |
| 2:00 AM | 10:00 AM prev day | Seattle only |
| 3:00 AM | 11:00 AM prev day | Seattle only |
| 4:00 AM | 12:00 PM prev day | Seattle only |
| 5:00 AM | 1:00 PM prev day | Seattle only |
| 6:00 AM | 2:00 PM prev day | Seattle only |
| 7:00 AM | 3:00 PM prev day | Seattle only |
| 8:00 AM | 4:00 PM prev day | Seattle only |
| 9:00 AM | 5:00 PM prev day | Seoul only |
| 10:00 AM | 6:00 PM prev day | Seoul only |
| 11:00 AM | 7:00 PM prev day | Seoul only |
| 12:00 PM | 8:00 PM prev day | Seoul only |
| 1:00 PM | 9:00 PM prev day | Seoul only |
| 2:00 PM | 10:00 PM prev day | Seoul only |
| 3:00 PM | 11:00 PM prev day | Seoul only |
| 4:00 PM | 12:00 AM | Seoul only |
| 5:00 PM | 1:00 AM | — |
| 6:00 PM | 2:00 AM | — |
| 7:00 PM | 3:00 AM | — |
| 8:00 PM | 4:00 AM | — |
| 9:00 PM | 5:00 AM | — |
| 10:00 PM | 6:00 AM | — |
| 11:00 PM | 7:00 AM | — |
Understanding the Seoul – Seattle Time Difference
Seoul runs on Asia/Seoul, currently KST (UTC+9:00). Seattle runs on America/Los_Angeles, currently PDT (UTC-7:00). The gap of 16 hours is simply the distance between those two offsets.
Seattle observes Daylight Saving Time and Seoul does not, so the gap between them shifts by an hour twice a year. The next shift is on Sunday, November 1, 2026, when Seattle adjusts its clocks and the difference becomes 17 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States.
Seoul today
Seattle today
Frequently Asked Questions
What is the time difference between Seoul and Seattle?
Seattle is currently 16 hours behind Seoul. That gap becomes 17 hours on Sunday, November 1, 2026, when Seattle changes its clocks.
How many hours behind is Seattle from Seoul?
Seattle is 16 hours behind Seoul. Looking at it the other way, Seoul is 16 hours ahead of Seattle.
What time is it in Seattle when it is 9:00 AM in Seoul?
When it is 9:00 AM in Seoul, it is 5:00 PM the previous day in Seattle.
Is Seattle ahead of or behind Seoul?
Seattle is 16 hours behind Seoul. Seoul reaches each point in the day first, so Seattle is still getting started while the Seoul working day is finishing.
What is the best time to call between Seoul and Seattle?
Standard business hours in Seoul and Seattle do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 2:00 PM in Seoul, which is 3:00 PM to 10:00 PM in Seattle.
Does the time difference between Seoul and Seattle change during the year?
Yes. Seattle observes Daylight Saving Time and Seoul does not, so the gap between them shifts during the year. It changes to 17 hours on Sunday, November 1, 2026.
What time zones are Seoul and Seattle in?
Seoul uses the Asia/Seoul time zone, currently KST (UTC+9:00). Seattle uses America/Los_Angeles, currently PDT (UTC-7:00).