PST vs KST Time Difference
See the current hour gap between Pacific Standard Time and Korea Standard Time, including DST changes and the best times to schedule calls.
How to Find the Time Difference Between PST and KST
Open the PST vs KST converter: Go to https://www.xconvert.com/time-converter/pst-vs-kst and you’ll see Pacific Time preloaded against Korea Standard Time on a visual 24-hour comparison grid. This page is especially useful if you are scheduling a video call between California and Seoul, coordinating a software release with a Korean development team, or checking whether a supplier in South Korea is still within business hours.
Add relevant comparison cities: Click “+ Add City” to add places such as Los Angeles, Seattle, or Vancouver for Pacific Time context, and Seoul or Busan for South Korea. This is helpful for industries that regularly work across these regions, including gaming, semiconductors, consumer electronics, logistics, and e-commerce, where teams often need to compare West Coast US work hours with Korean office hours.
Drag to select a meeting window: Click “Select” to enter selection mode, then drag across the grid to highlight a time range in purple; you can resize it with the left and right handles or move it by dragging the center. For example, if you drag 4:00 PM to 6:00 PM PST, the grid will show 9:00 AM to 11:00 AM KST the next day, which is a practical overlap for evening calls from California and morning meetings in Seoul.
Export and share the selected time: Once a range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is useful when you want to send a confirmed meeting slot to a distributed team so everyone sees the event in local time automatically, whether you are arranging a client presentation, a factory update, or a cross-border hiring interview.
PST vs KST Offset Explained
Korea Standard Time (KST) is 17 hours ahead of Pacific Standard Time (PST). When it is 9:00 AM PST, it is 2:00 AM the next day in KST. When it is 5:00 PM PST, it is 10:00 AM the next day in South Korea, which is why late afternoon on the US West Coast often aligns with the next business morning in Seoul.
The exact UTC offsets are PST = UTC-8 and KST = UTC+9. South Korea uses KST year-round and does not observe daylight saving time, while Pacific Time in North America changes seasonally. That means the 17-hour difference applies only during the Pacific Standard Time period, typically from early November to mid-March.
Daylight saving time creates an important seasonal shift for users comparing these regions. In the United States and Canada, Pacific Time switches to Pacific Daylight Time (PDT, UTC-7) on the second Sunday in March and returns to PST (UTC-8) on the first Sunday in November. During that PDT period, KST is 16 hours ahead instead of 17, so a meeting that was 4:00 PM in California and 9:00 AM in Seoul during winter becomes 5:00 PM in California for the same 9:00 AM Seoul slot in summer.
For 2026, Pacific Time changes to daylight saving time on March 8, 2026, and returns to standard time on November 1, 2026. South Korea stays on UTC+9 throughout the year, so if you are planning recurring meetings, quarterly reviews, or support coverage rotations, you need to account for that one-hour shift in North America. This matters for companies in entertainment, cloud services, gaming, chip manufacturing, and international shipping that operate between cities like Los Angeles, San Francisco, Seattle, and Seoul.
A practical way to think about the difference is by business overlap. Typical office hours in Seoul are around 9:00 AM to 6:00 PM KST, which correspond to roughly 4:00 PM to 1:00 AM PST during standard time. That means the best real-time overlap usually happens in the late afternoon and early evening on the US West Coast, while Korean teams are starting their workday.
Frequently Asked Questions
What is the exact time difference between PST and KST?
KST is 17 hours ahead of PST when Pacific Time is on standard time. Because KST is UTC+9 and PST is UTC-8, you add 17 hours to convert from PST to KST. For example, 8:00 AM PST = 1:00 AM KST the next day, and 3:00 PM PST = 8:00 AM KST the next day.
Does South Korea use daylight saving time?
No, South Korea does not currently observe daylight saving time and stays on Korea Standard Time (UTC+9) all year. This makes Korean scheduling predictable, but the difference still changes seasonally because Pacific Time shifts between PST and PDT. As a result, the gap is 17 hours in PST and 16 hours in PDT.
Why does the PST to KST time difference change during part of the year?
The difference changes because Pacific Time in the US and Canada follows daylight saving time, while South Korea does not. Pacific Time moves from UTC-8 to UTC-7 on the second Sunday in March and returns to UTC-8 on the first Sunday in November. That one-hour change reduces the gap from 17 hours to 16 hours during the daylight saving period.
What is the best meeting time between California and South Korea?
A common working overlap is 4:00 PM to 6:00 PM PST, which becomes 9:00 AM to 11:00 AM KST the next day. This window works well for engineering standups, supplier updates, and account management calls because it avoids very early mornings in Seoul and keeps West Coast participants within the normal business day or just after it. If Pacific Time is on daylight saving time, the equivalent California slot for a 9:00 AM Seoul meeting shifts to 5:00 PM PDT.
If it is 9 AM in PST, what time is it in KST?
If it is 9:00 AM PST, it is 2:00 AM KST the next day. That means a morning meeting on the US West Coast is usually not practical for colleagues in South Korea unless they are working overnight or covering a special launch window. For recurring cross-border meetings, teams usually move the call to late afternoon Pacific Time so it lands in the Korean morning.
Is PST or KST better for live business communication?
Neither time zone is inherently better; it depends on who needs to be available during normal office hours. For live communication between the US West Coast and South Korea, late afternoon PST is generally the most efficient because it maps to the next morning in KST, when Korean offices are opening. This pattern is common in sectors such as electronics manufacturing, gaming operations, media licensing, and international freight coordination.
How do I schedule recurring meetings between PST and KST without mistakes?
Use a visual comparison tool and always check whether the Pacific side is currently on PST or PDT before sending invites. A recurring 5:00 PM Pacific meeting will appear as 10:00 AM KST in winter if based on PST, but the relationship shifts when daylight saving time starts, so calendar invites should be reviewed around March and November. Exporting the selected slot as ICS or sending it through Google Calendar helps reduce manual conversion errors for distributed teams.