Time difference
Time difference between San Francisco and Seoul
Find the best time to schedule a call or meeting.
Seoul is currently 16 hours ahead of San Francisco.
San Francisco • PDT
3:40 AM
Thursday, Jun 18
Seoul • GMT+9
7:40 PM
Thursday, Jun 18
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Best times to meet
Standard 9 AM – 5 PM hours in San Francisco 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 San Francisco, or a 6–8 PM meeting in Seoul.
Quick conversion table
| San Francisco | Seoul |
|---|---|
| 8 AM | 12:00 AM (next day) |
| 12 PM | 4:00 AM (next day) |
| 3 PM | 7:00 AM (next day) |
| 5 PM | 9:00 AM (next day) |
| 9 PM | 1:00 PM (next day) |
Daylight saving
Heads up: the gap will widen to 17 hours around November 5, when one of the cities shifts for daylight saving. Double-check meeting times scheduled across that date.
Frequently asked questions
- How many hours ahead is Seoul than San Francisco?
- Seoul is 16 hours ahead of San Francisco.
- What time is 9 AM in San Francisco in Seoul?
- 9:00 AM in San Francisco is 1:00 AM the next day in Seoul.
- Do San Francisco and Seoul observe daylight saving?
- Heads up: the gap will widen to 17 hours around November 5, when one of the cities shifts for daylight saving. Double-check meeting times scheduled across that date.
- When is the best time to call Seoul from San Francisco?
- San Francisco and Seoul business hours don't overlap. The closest options are early mornings in San Francisco or late evenings, when one side stretches outside 9–5.