Time difference
Seattle to Seoul Time Difference
Seoul is 16 hours ahead of Seattle — when it's 12:00 PM in Seattle, it's 4:00 AM the next day in Seoul. (Seattle (America/Los_Angeles, PDT); Seoul (Asia/Seoul, KST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Seoul is 16 hours ahead of Seattle. Standard 9 AM–5 PM business hours in Seattle and Seoul do not overlap, so a live call needs one side outside normal hours. Clocks change on November 1, 2026, which briefly shifts the gap between Seattle and Seoul — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in Seattle, it's 1:00 AM the next day in Seoul.
- When it's 9:00 AM in Seoul, it's 5:00 PM the previous day in Seattle.
Seoul is currently 16 hours ahead of Seattle.
Interactive converter
12:00PM
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Best times to meet
Standard 9 AM – 5 PM hours in Seattle and Seoul do not overlap. The least-bad options are an early start in one city or a late evening call in the other — for example a 7–8 AM meeting in Seattle, or a 6–8 PM meeting in Seoul.
Quick conversion table
| Seattle | Seoul |
|---|---|
| 12 AM | 4:00 PM |
| 1 AM | 5:00 PM |
| 2 AM | 6:00 PM |
| 3 AM | 7:00 PM |
| 4 AM | 8:00 PM |
| 5 AM | 9:00 PM |
| 6 AM | 10:00 PM |
| 7 AM | 11:00 PM |
| 8 AM | 12:00 AM (next day) |
| 9 AM | 1:00 AM (next day) |
| 10 AM | 2:00 AM (next day) |
| 11 AM | 3:00 AM (next day) |
| 12 PM | 4:00 AM (next day) |
| 1 PM | 5:00 AM (next day) |
| 2 PM | 6:00 AM (next day) |
| 3 PM | 7:00 AM (next day) |
| 4 PM | 8:00 AM (next day) |
| 5 PM | 9:00 AM (next day) |
| 6 PM | 10:00 AM (next day) |
| 7 PM | 11:00 AM (next day) |
| 8 PM | 12:00 PM (next day) |
| 9 PM | 1:00 PM (next day) |
| 10 PM | 2:00 PM (next day) |
| 11 PM | 3:00 PM (next day) |
Daylight saving
On November 1, 2026, Seattle shifts for daylight saving. After that, Seoul will be 17 hours ahead of Seattle (currently 16 hours ahead of Seattle). The converter and the tables above always reflect the correct offset for the date you pick.
- Seattle is currently observing daylight saving time.
- Seoul does not observe daylight saving time.
Frequently asked questions
- Is Seoul ahead of or behind Seattle?
- Seoul is 16 hours ahead of Seattle.
- How many hours ahead of Seattle is Seoul?
- Seoul is 16 hours ahead of Seattle.
- What time is 9 AM in Seattle in Seoul?
- 9:00 AM in Seattle is 1:00 AM the next day in Seoul.
- What time is noon in Seattle in Seoul?
- 12:00 PM in Seattle is 4:00 AM the next day in Seoul.
- What time is 5 PM in Seattle in Seoul?
- 5:00 PM in Seattle is 9:00 AM the next day in Seoul. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Seattle in Seoul?
- 3:00 PM in Seattle is 7:00 AM the next day in Seoul.
- Is Seattle currently observing daylight saving time?
- Seattle is currently observing daylight saving time (summer time).
- Is Seoul currently observing daylight saving time?
- Seoul does not observe daylight saving time — its UTC offset stays the same all year.
- Do Seattle and Seoul observe daylight saving?
- On November 1, 2026, Seattle shifts for daylight saving. After that, Seoul will be 17 hours ahead of Seattle (currently 16 hours ahead of Seattle). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call Seoul from Seattle?
- Seattle and Seoul business hours don't overlap. The closest options are early mornings in Seattle or late evenings, when one side stretches outside 9–5.
- When is the best time to call Seattle from Seoul?
- Seoul and Seattle business hours don't overlap. The closest options are early mornings in Seoul or late evenings, when one side stretches outside 9–5.
- Seattle (PDT) to Seoul (KST) — how do I convert quickly?
- Add 16 hours to Seattle local time to get Seoul local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
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