The short answer

Pacific Time is 16 hours behind Seoul.

Pacific Time
10:21:57pm
PDT · UTC-07:00 · Sun, Jun 21
Seoul
2:21:57pm
KST · UTC+09:00 · Mon, Jun 22
Read across to convert
Pacific Time
PDT · UTC-07:00
10:21pm ☾
Seoul
KST · UTC+09:00
2:21pm ☀
Click any row to pin that hour across both zones.
12amSun
4pm
WORK
1am
5pm
2am
6pm
3am
7pm
4am
8pm
5am
9pm
6am
10pm
7am
11pm
8am
12amMon ·+1d
9am
WORK
1amMon ·+1d
10am
WORK
2amMon ·+1d
11am
WORK
3amMon ·+1d
12pm
WORK
4amMon ·+1d
1pm
WORK
5amMon ·+1d
2pm
WORK
6amMon ·+1d
3pm
WORK
7amMon ·+1d
4pm
WORK
8amMon ·+1d
5pm
9amMon ·+1d
WORK
6pm
10amMon ·+1d
WORK
7pm
11amMon ·+1d
WORK
8pm
12pmMon ·+1d
WORK
9pm
1pmMon ·+1d
WORK
NOW
10pm
2pmMon ·+1d
WORK
11pm
3pmMon ·+1d
WORK
daylightnightworking hoursoverlap
Best time to meet
Closest workable window
Just outside the working window — early on one side, late on the other.
Pacific Time
3pm–7pm
=
Seoul
7am–11am
next day
Popular conversions

Quick reference.

9amPacific Time=1amSeoul · next day
12pmPacific Time=4amSeoul · next day
3pmPacific Time=7amSeoul · next day
5pmPacific Time=9amSeoul · next day
9pmPacific Time=1pmSeoul · next day
In context

What each side covers.

Pacific Time
PDT · UTC-07:00
10:21pm
Seoul
KST · UTC+09:00
2:21pm
Cities on this clock

Frequently asked

Quick answers about converting between Pacific Time and Seoul. Can't find what you need? Email [email protected].

What is the time difference between Pacific Time and Seoul?
Pacific Time is 16 hours behind Seoul right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
When it's 9am in Pacific Time, what time is it in Seoul?
9am in Pacific Time is 1am in Seoul on the next day. Use the hour-by-hour table above to read any other time across — find the row and read the matching cell in the other column.
What's the best time for a call between Pacific Time and Seoul?
There's no comfortable 9-to-5 overlap between Pacific Time and Seoul — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.
Does this account for daylight saving time?
Yes. We track every clock change in both places, so the abbreviations you see — PDT and KST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
Why is the date sometimes different on each side?
When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.