No overlap — one side will join outside working hours
PST (Los Angeles)
KST (Seoul)
00:00
16:00Working
01:00
17:00
02:00
18:00
03:00
19:00
04:00
20:00
05:00
21:00
06:00
22:00
07:00
23:00
08:00
00:00+1d
09:00Working
01:00+1doff
10:00Working
02:00+1doff
11:00Working
03:00+1doff
12:00Working
04:00+1doff
13:00Working
05:00+1doff
14:00Working
06:00+1doff
15:00Working
07:00+1doff
16:00Working
08:00+1doff
17:00
09:00+1dWorking
18:00
10:00+1dWorking
19:00
11:00+1dWorking
20:00
12:00+1dWorking
21:00
13:00+1dWorking
22:00
14:00+1dWorking
23:00
15:00+1dWorking
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between pst and kst?
Pacific Standard Time (pst) is UTC-7 and Korea Standard Time (kst) is UTC+9. The difference between them is 16 hours.
Where is pst used?
Pacific Standard Time (pst) is used in USA and surrounding regions. The IANA timezone identifier is America/Los_Angeles.
Where is kst used?
Korea Standard Time (kst) is used in South Korea and surrounding regions. The IANA timezone identifier is Asia/Seoul.
How do I convert pst to kst?
Use the interactive converter above. Drag the time slider to any pst time and the kst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
PST (Los Angeles) is 16 hours behind KST (Seoul). At noon in PST (Los Angeles), your contact in KST (Seoul) sees 04:00.
PST (Los Angeles) runs on America/Los_Angeles; KST (Seoul) runs on Asia/Seoul. Together they are 16 hours apart.
Mutual working hours
There is no business hours overlap between PST (Los Angeles) and KST (Seoul) during standard working hours (9:00–17:00). Meetings would require one party to work outside normal hours.
Best call times between these locations
PST (Los Angeles) and KST (Seoul) have no shared working window. These slots minimize out-of-hours disruption for both sides.
16:00 Los Angeles / 08:00 Seoul⚡ One side off-hours
⚠️ 1h before working hours in Seoul
17:00 Los Angeles / 09:00 Seoul⚡ One side off-hours
⚠️ 1h after working hours in Los Angeles
15:00 Los Angeles / 07:00 Seoul⚡ One side off-hours
⚠️ 2h before working hours in Seoul
Working hours defined as 09:00–17:00 local time for each location.
Public holidays for both locations
⚡ Holiday alerts for both locations, double-check schedules before confirming.
PST (Los Angeles)7 holidays
Jul 3Independence DaySOON
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Nov 11Veterans Day
KST (Seoul)7 holidays
Aug 15Liberation Day
Sep 24Chuseok
Sep 25Chuseok
Sep 26Chuseok
Oct 3National Foundation Day
Scheduling between PST (Los Angeles) and KST (Seoul)
PST (Los Angeles) (USA) and KST (Seoul) (South Korea) are 16 hours apart — far enough that standard 9–5 schedules do not overlap. Any real-time meeting means someone is joining outside their normal hours.
💡 Scheduling tips for these locations
⚡
A 16:00 meeting in PST (Los Angeles) means 08:00 in KST (Seoul) (1h before working hours in Seoul).
⚡
A 17:00 meeting in PST (Los Angeles) means 09:00 in KST (Seoul) (1h after working hours in Los Angeles).
⚡
A 15:00 meeting in PST (Los Angeles) means 07:00 in KST (Seoul) (2h before working hours in Seoul).
With no shared business hours, these slots distribute the scheduling burden as evenly as possible between both locations.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am PST (Los Angeles)".
