Convert BST to KST
See the 8-hour time difference between BST and KST, compare hours side by side, and schedule meetings with calendar export tools.
How to Convert BST to KST
Open the BST to KST converter: Go to https://www.xconvert.com/time-converter/bst-to-kst-converter to load a visual comparison grid with BST already matched against KST. This page is useful when you are scheduling a call between London-based teams working on British Summer Time and colleagues in Seoul, where many technology, electronics, gaming, and manufacturing companies operate on Korea Standard Time.
Add comparison cities if your schedule involves more than two offices: Click “+ Add City” and search for cities such as London, Seoul, and optionally Singapore or New York if you are coordinating regional sales, finance, or product teams. This is especially practical for multinational companies that need to compare UK client hours, South Korean headquarters hours, and other APAC or US stakeholder schedules on the same 24-hour grid.
Drag across the grid to select the meeting window: Use the “Select” button if needed, then drag on the colored timeline in the BST row to highlight a range such as 9:00 AM to 11:00 AM BST, which corresponds to 5:00 PM to 7:00 PM KST on the same day. You can drag the center of the purple block to move the whole window or use the left and right handles to resize it, which helps confirm whether a UK morning meeting still lands inside normal Seoul business hours.
Export the selected time for your team: Once a range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For example, a UK account manager can send the ICS file to a Seoul client so the appointment appears automatically in local time, while the share link is useful for remote teams confirming handoff windows across both regions.
Understanding the BST to KST Time Difference
BST stands for British Summer Time, which is UTC+1, while KST stands for Korea Standard Time, which is UTC+9. That means KST is 8 hours ahead of BST, so when it is 9:00 AM in BST, it is 5:00 PM in KST on the same calendar day.
This 8-hour difference applies only while the UK is observing British Summer Time, which normally runs from the last Sunday in March to the last Sunday in October. In 2025, BST begins on 30 March 2025 and ends on 26 October 2025, so during that period the BST-to-KST gap remains a steady 8 hours.
KST does not observe daylight saving time, so South Korea stays on UTC+9 all year. The UK changes between GMT (UTC+0) in winter and BST (UTC+1) in summer, which means the difference between the UK and South Korea is 9 hours during GMT months and 8 hours during BST months.
This seasonal shift matters for real scheduling decisions. A recurring London-to-Seoul operations call that works at 8:00 AM UK time in July lands at 4:00 PM in Seoul, but the same 8:00 AM UK time in December becomes 5:00 PM in Seoul, which can push meetings later into the Korean workday.
Best Times for Calls and Meetings Between BST and KST
Because KST is 8 hours ahead of BST during British Summer Time, the most practical overlap usually happens during the UK morning and Korea late afternoon to early evening. A strong working window is 9:00 AM to 11:00 AM BST = 5:00 PM to 7:00 PM KST, which is often suitable for product reviews, client updates, and cross-border project check-ins.
An earlier option is 8:00 AM to 10:00 AM BST = 4:00 PM to 6:00 PM KST. This window is often better for formal business meetings because it stays closer to standard office hours in Seoul while still fitting the beginning of the UK workday, which is useful for finance teams, software delivery standups, and logistics coordination.
If you need a shorter overlap that avoids late-evening Korean time, 7:00 AM to 9:00 AM BST = 3:00 PM to 5:00 PM KST can work well for urgent operational handoffs. This is particularly useful for industries with same-day turnaround requirements, such as e-commerce support, semiconductor supply coordination, international shipping, and media production.
Meetings scheduled after 12:00 PM BST become 8:00 PM KST or later, which is usually too late for routine business calls in South Korea. Likewise, a standard 9:00 AM KST start corresponds to 1:00 AM BST, so Seoul morning meetings are generally impractical for UK-based participants unless the call is reserved for critical launches, incident response, or executive-level coordination.
Frequently Asked Questions
What is the time difference between BST and KST?
KST is 8 hours ahead of BST. For example, if it is 10:00 AM BST, it is 6:00 PM KST the same day, which is why UK morning hours are usually the best option for speaking with teams in South Korea.
When is 9 AM BST in KST?
9:00 AM BST is 5:00 PM KST on the same day. This conversion is commonly used for scheduling London-to-Seoul business calls because it falls near the end of the Korean workday but still remains practical for many office-based teams.
Does the difference between BST and KST change during daylight saving time?
Yes, the difference changes because the UK observes daylight saving time and South Korea does not. During BST (UTC+1), KST is 8 hours ahead, but during GMT (UTC+0) in the UK winter, KST is 9 hours ahead, so recurring meetings may need seasonal adjustment.
What is the best meeting time between BST and KST?
The best meeting window is usually 8:00 AM to 11:00 AM BST, which equals 4:00 PM to 7:00 PM KST. This range creates the most realistic overlap for normal office schedules, especially for technology partnerships, supplier calls, client reporting, and distributed team coordination between the UK and South Korea.
Is BST the same as London time?
BST is London time only during the part of the year when the UK is on summer time. London uses BST (UTC+1) from the last Sunday in March to the last Sunday in October, and uses GMT (UTC+0) for the rest of the year, so the exact UK-to-Korea difference depends on the date.
Does South Korea use daylight saving time?
No, South Korea uses Korea Standard Time (UTC+9) all year and does not currently switch clocks for daylight saving time. That makes Seoul scheduling more predictable, but UK-based teams still need to account for the British clock change in March and October.
Why do BST to KST meetings usually happen in the UK morning?
Because Seoul is 8 hours ahead during BST, a UK morning slot translates into late afternoon or early evening in South Korea. For example, 8:30 AM BST = 4:30 PM KST, which is much more workable than trying to match a Seoul morning meeting that would fall in the middle of the night in the UK.