The time difference between Seoul and San Francisco is 16 hours. When it is 12:00 noon in Seoul, it is 20:00 in San Francisco. Seoul uses the Asia/Seoul time zone (UTC+9), while San Francisco uses America/Los_Angeles (UTC-7).
| Detail | Seoul | San Francisco |
|---|---|---|
| Time Zone ID | Asia/Seoul | America/Los_Angeles |
| UTC Offset | UTC+9 | UTC-7 |
| Abbreviation | KST | PDT |
| DST Active | No | Yes — currently observing |
| Country | South Korea | United States |
| Region | Asia | North America |
With a 16 hours gap, there is no standard business-hours overlap between Seoul and San Francisco. One party will need to adjust their schedule. Early mornings in Seoul or late evenings in San Francisco tend to be the most practical compromise.
Use this table to quickly convert any hour from Seoul time to San Francisco time. Rows highlighted in green indicate overlapping business hours in both cities.
| Seoul | San Francisco | |
|---|---|---|
| 00:00 | 08:00 (-1 day) | Night |
| 01:00 | 09:00 (-1 day) | Night |
| 02:00 | 10:00 (-1 day) | Night |
| 03:00 | 11:00 (-1 day) | Night |
| 04:00 | 12:00 (-1 day) | Night |
| 05:00 | 13:00 (-1 day) | Night |
| 06:00 | 14:00 (-1 day) | |
| 07:00 | 15:00 (-1 day) | |
| 08:00 | 16:00 (-1 day) | |
| 09:00 | 17:00 (-1 day) | |
| 10:00 | 18:00 (-1 day) | |
| 11:00 | 19:00 (-1 day) | |
| 12:00 | 20:00 (-1 day) | |
| 13:00 | 21:00 (-1 day) | |
| 14:00 | 22:00 (-1 day) | |
| 15:00 | 23:00 (-1 day) | |
| 16:00 | 00:00 | |
| 17:00 | 01:00 | |
| 18:00 | 02:00 | |
| 19:00 | 03:00 | |
| 20:00 | 04:00 | |
| 21:00 | 05:00 | |
| 22:00 | 06:00 | Night |
| 23:00 | 07:00 | Night |
San Francisco is currently observing daylight saving time, while Seoul is on standard time. When San Francisco switches back to standard time, the difference between these two cities will shift by 1 hour.
The time difference is 16 hours. San Francisco is 16 hours behind Seoul.
Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.
There is no ideal window during standard business hours. Consider scheduling at the edges — early morning for the city that is ahead and late afternoon for the city that is behind.
Subtract 16 hours from Seoul time to get San Francisco time. Use the hour-by-hour table above for a quick reference.
For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.