Convert KST to PST
Compare Korea Standard Time and Pacific Standard Time with a live conversion table, meeting planner, and automatic daylight saving adjustments.
How KST to PST Works
Convert Korea Standard Time (UTC+9) to Pacific Standard Time (UTC-8) using the current offset difference between South Korea and the U.S. Pacific time zone. The converter updates automatically when Pacific Time switches between standard time and daylight time.
Hour-by-Hour Time Table
Use the visual hour-by-hour table to compare KST and PST across the day and quickly spot overlapping working hours. You can review exact times, scan the grid, and export selections to ICS or Google Calendar for Gmail-friendly scheduling.
Schedule Meetings Across Zones
Plan calls between Korea Standard Time and Pacific Standard Time with automatic DST tracking and accurate local-time conversion. Time changes and historical rules are based on the IANA timezone database to keep meeting times reliable.
How to Convert KST to PST
KST (Korea Standard Time, UTC+9) to PST (Pacific Standard Time, UTC-8) conversion is used most often when teams in South Korea coordinate with colleagues, customers, or vendors on the west coast of Canada, Mexico, or the United States. Looking for Pitcairn Standard Time? See /time-converter/pst-pitcairn-time-zone.
Open the converter page: Go to https://www.xconvert.com/time-converter/kst-to-pst-converter to open a visual comparison grid with Korea Standard Time already paired against Pacific Standard Time. This layout is useful when you are planning a call from Seoul with partners in Los Angeles, Vancouver, or Baja California and need to see the previous-day shift immediately.
Add comparison cities: Click + Add City and add places that matter to your workflow, such as Seoul for South Korea-based operations and west-coast business hubs in the United States, Canada, or Mexico that use Pacific Standard Time. This is especially practical for gaming, electronics, logistics, and media teams that coordinate launch schedules, support coverage, or supplier calls across East Asia and North America.
Select a time range on the grid: Click Select, then drag across the colored timeline in the Korea Standard Time row to highlight a meeting window in purple; you can resize it with the side handles or move it by dragging the center. For example, dragging around 9:00 KST shows 16:00 PST (previous day), while 12:00 KST = 19:00 PST (previous day) and 15:00 KST = 22:00 PST (previous day), which quickly shows why a Korea morning meeting lands on the prior afternoon or evening in Pacific Standard Time.
Export and share the result: After selecting a range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is useful when a Seoul product team needs to send a confirmed handoff window to Pacific Standard Time stakeholders so everyone receives the slot in their own calendar system without manually rewriting the time.
Understanding the KST to PST Time Difference
KST (Korea Standard Time, UTC+9) is 17 hours ahead of PST (Pacific Standard Time, UTC-8), and PST is 17 hours behind KST. That means a daytime hour in Korea often maps to the previous day in Pacific Standard Time, which is the key scheduling challenge for cross-Pacific communication.
Pacific Standard Time is the standard-time abbreviation used in parts of Canada, Mexico, and the United States, while Korea Standard Time is used in North Korea and South Korea. Korea Standard Time does not observe DST, but Pacific Standard Time has a daylight-saving counterpart called PDT, so the KST-to-PST difference does not stay the same all year.
The difference is 17 hours when Pacific Standard Time is in effect. Using the standard examples: 9:00 KST = 16:00 PST (previous day), 12:00 KST = 19:00 PST (previous day), 15:00 KST = 22:00 PST (previous day), and 18:00 KST = 1:00 PST.
Because Korea Standard Time stays fixed all year and Pacific Standard Time switches to PDT during daylight-saving months, the KST-to-PST gap changes during the part of the year when Pacific regions are not on standard time. In practical terms, if you are arranging recurring meetings, winter schedules using Pacific Standard Time should be reviewed again when Pacific locations move to PDT, since the offset will no longer match the 17-hour Pacific Standard Time relationship shown on this page.
Best Times for Calls and Meetings Between KST and PST
KST (Korea Standard Time, UTC+9) and PST (Pacific Standard Time, UTC-8) have a large 17-hour separation, so the most workable overlap usually happens when one side meets in the morning and the other side joins on the previous afternoon or evening. This pattern is common for Korean headquarters coordinating with west-coast engineering, entertainment, e-commerce, and logistics teams in North America.
The clearest examples are morning-to-evening handoffs from Korea. 9:00 KST = 16:00 PST (previous day) works for late-afternoon review calls, 12:00 KST = 19:00 PST (previous day) can suit evening support or launch coordination, and 15:00 KST = 22:00 PST (previous day) is already quite late for Pacific Standard Time participants, making it better for urgent issues than routine meetings.
If the Korea side can meet later in the day, 18:00 KST = 1:00 PST shows how quickly the overlap disappears for standard business hours in Pacific Standard Time. For most routine meetings, the most practical windows are usually built around Korea morning hours, because those convert into previous-day afternoon or evening in Pacific Standard Time rather than the middle of the night.
For remote teams, this means different meeting types should use different windows. A sales update or executive check-in can fit around 9:00 KST / 16:00 PST (previous day), while technical incident response may stretch toward 12:00 KST / 19:00 PST (previous day) if Pacific Standard Time staff have after-hours coverage.
Frequently Asked Questions
What is the time difference between KST and PST?
KST (Korea Standard Time, UTC+9) is 17 hours ahead of PST (Pacific Standard Time, UTC-8). Put another way, PST is 17 hours behind KST, which is why Korea daytime often appears as the previous calendar day in Pacific Standard Time.
This difference matters for planning business calls, release windows, and support coverage between Korea and the Pacific coast of North America. A morning schedule in Korea can still be a late-afternoon or evening schedule in Pacific Standard Time on the day before.
When is 9 AM KST in PST?
9:00 KST = 16:00 PST (previous day). This is one of the most useful reference points for recurring meetings because it places a Korea morning call into a Pacific Standard Time late-afternoon slot rather than overnight hours.
For example, if a Seoul team wants a daily sync at 9 AM local time, Pacific Standard Time participants would join at 4 PM on the previous day. That setup often works well for handoffs, status reviews, and end-of-day reporting on the North American side.
Does the KST to PST difference change during DST?
Yes. Korea Standard Time does not observe DST, while Pacific Standard Time is specifically the standard-time abbreviation and its daylight-saving counterpart is PDT.
That means the 17-hour KST-to-PST difference applies when Pacific Standard Time is in use, but it changes during the months when Pacific locations switch to PDT. This is important for recurring meetings because a winter calendar invite based on Pacific Standard Time may need to be adjusted once daylight-saving time begins.
What is the best meeting time between KST and PST?
The most practical meeting windows usually start from the Korea morning, because those hours convert to the previous day afternoon or evening in Pacific Standard Time. The clearest examples are 9:00 KST = 16:00 PST (previous day) and 12:00 KST = 19:00 PST (previous day).
These times are often suitable for cross-border product reviews, supplier coordination, and customer calls involving South Korea and Pacific coast teams in Canada, Mexico, or the United States. By contrast, 15:00 KST = 22:00 PST (previous day) and 18:00 KST = 1:00 PST are much less comfortable for routine meetings.
When is 12 PM KST in PST?
12:00 KST = 19:00 PST (previous day). This conversion is useful for teams that prefer a Korea lunchtime or midday checkpoint while still keeping Pacific Standard Time participants within an evening window.
It can work well for launch monitoring, operations escalations, or media coordination when west-coast staff are available after normal office hours. For standard weekly meetings, though, many teams prefer an earlier Korea slot such as 9:00 KST to avoid pushing Pacific Standard Time attendees too far into the evening.
Is PST Pacific Standard Time or Pitcairn Standard Time?
On this page, PST means Pacific Standard Time (UTC-8). PST can also mean Pitcairn Standard Time (UTC-8), which is covered separately at /time-converter/pst-pitcairn-time-zone.
This distinction matters because the abbreviation is shared even though the page topic here is only Pacific Standard Time. If you are comparing Korea with west-coast regions in Canada, Mexico, or the United States, Pacific Standard Time is the correct meaning.
Which countries use KST and Pacific Standard Time?
KST (Korea Standard Time, UTC+9) is used in North Korea and South Korea. Pacific Standard Time is used in parts of Canada, Mexico, and the United States.
This country-level context is useful when scheduling international work across manufacturing, gaming, electronics, shipping, and customer support teams. It helps confirm that the converter is relevant for Korea-to-Pacific coast coordination rather than for a different time zone that happens to share the same abbreviation.