Convert KST to BST
See the current time difference from Korea Standard Time to British Summer Time and use the table to schedule calls and meetings.
How to Convert KST to BST
Open the KST to BST converter: Go to https://www.xconvert.com/time-converter/kst-to-bst-converter to load a visual comparison between Korea Standard Time and British Summer Time. This page is useful when you are scheduling a call between Seoul and London, confirming a product launch handoff between a South Korean tech team and a UK marketing team, or checking whether a same-day meeting is possible across Europe and East Asia.
Add comparison cities relevant to your schedule: Click “+ Add City” and add cities such as Seoul, London, and optionally Singapore or New York if your company also works across APAC and North America. This is especially practical for industries like electronics, gaming, finance, shipping, and media, where Korean operations often coordinate with UK headquarters, European clients, or global support teams.
Drag on the grid to select a meeting window: Use the Select button if needed, then drag across the KST row 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 PM to 6 PM KST, the BST row will show 8 AM to 10 AM BST, which is one of the most workable same-day windows for a London-Seoul business call without forcing either side into very late hours.
Export and share the converted time: Once the range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. That makes it easy to send a confirmed cross-time-zone slot to a UK client, add it to a distributed team calendar automatically, or share a link with colleagues so everyone sees the meeting in their own local time.
Understanding the KST to BST Time Difference
KST is 8 hours ahead of BST. Korea Standard Time is UTC+9 all year, while British Summer Time is UTC+1 during the UK daylight saving period. That means when it is 9:00 AM in Seoul, it is 1:00 AM in London during BST.
This 8-hour difference only applies while the UK is on British Summer Time, which normally runs from the last Sunday in March to the last Sunday in October. In 2026, for example, BST begins on 29 March 2026 and ends on 25 October 2026; during that period, Seoul remains on UTC+9 with no seasonal clock change, while the UK moves one hour ahead from GMT to BST.
Outside the BST season, the UK uses Greenwich Mean Time (GMT, UTC+0), and the gap becomes 9 hours instead of 8. This matters for recurring meetings, quarterly reporting deadlines, and travel itineraries because a call that works in July may shift by one hour in November if the UK returns to standard time while Korea stays unchanged.
KST is used across South Korea, including Seoul, Busan, Incheon, Daegu, and Daejeon, and the country has a population of about 51 million. BST is the summer clock used across the United Kingdom, including London, Manchester, Birmingham, Edinburgh, and Cardiff, serving a population of about 67 million; this time relationship is especially relevant for trade, automotive supply chains, semiconductors, entertainment, and financial coordination between East Asia and the UK.
Best Times for Calls and Meetings Between KST and BST
Because KST is 8 hours ahead of BST, the most practical overlap usually happens in the late afternoon or early evening in Korea and the morning in the UK. A standard office day of 9 AM to 6 PM KST corresponds to 1 AM to 10 AM BST, so only the final part of a Korean workday overlaps with a normal UK morning.
A strong meeting window is 4 PM to 6 PM KST = 8 AM to 10 AM BST. This works well for sales calls, engineering standups, logistics coordination, and agency-client meetings because London teams are just starting the day while Seoul teams are still within normal office hours.
Another common option is 5 PM to 7 PM KST = 9 AM to 11 AM BST. This is often the best balance for executive updates, account management, and project reviews, although the Korean side may need to stay slightly later than standard office hours if the meeting runs long.
If you need a shorter overlap strictly inside typical office hours for both sides, 5 PM to 6 PM KST = 9 AM to 10 AM BST is one of the safest choices. That slot is especially useful for recurring weekly meetings because it avoids very early UK starts and keeps the Seoul team from moving too far into the evening.
Early-morning meetings in Korea are usually poor for UK participants during BST. For example, 9 AM to 11 AM KST = 1 AM to 3 AM BST, which is not realistic for normal business communication unless you are handling urgent production incidents, live broadcast coordination, or overnight market-sensitive operations.
For travel and flight planning, the time gap also affects arrival-day communication. A traveler leaving London in the morning and landing in Seoul the next day may need to account for the 8-hour lead when arranging airport pickups, hotel check-ins, or first-day meetings, especially on routes connected through major hubs such as Doha, Dubai, Frankfurt, Paris, or Istanbul.
Frequently Asked Questions
What is the time difference between KST and BST?
Korea Standard Time is 8 hours ahead of British Summer Time. In practical terms, if it is 12:00 PM KST, it is 4:00 AM BST on the same calendar day.
This applies only while the UK is observing daylight saving time. When the UK switches back to GMT in late October, the difference becomes 9 hours because Korea does not change its clocks.
When is 9 AM KST in BST?
9:00 AM KST is 1:00 AM BST. Since Seoul is 8 hours ahead during the British Summer Time period, you subtract 8 hours from Korean time to get the UK summer time.
This example shows why morning meetings in Korea are usually difficult for London-based teams. A Korean morning standup would happen in the middle of the night in the UK, so most companies move joint meetings to late afternoon in Seoul instead.
Does the difference between KST and BST change during DST?
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), KST is 9 hours ahead.
The change usually happens from the last Sunday in March to the last Sunday in October. This is important for recurring meetings, especially for multinational teams that schedule quarterly reviews or standing client calls months in advance.
What is the best meeting time between KST and BST?
The best meeting window is usually 4 PM to 6 PM KST, which equals 8 AM to 10 AM BST. That range gives the UK side a normal morning slot and keeps the Korean side within or close to regular business hours.
A particularly balanced recurring slot is 5 PM KST = 9 AM BST. Many cross-border teams use this timing for weekly check-ins, project updates, and commercial discussions because it minimizes disruption on both sides.
How do I convert KST to BST on https://www.xconvert.com?
Open the converter page and use the visual timeline to compare the two time zones directly rather than typing a time manually. Drag across the KST row to highlight a time period, then read the aligned BST row to see the exact corresponding time in the UK.
You can then adjust the selection by dragging the purple handles or moving the whole block if you want to test earlier or later meeting options. After that, export the result through ICS, Google Calendar, Gmail, Copy to clipboard, or Share link for team coordination.
Why is Seoul so far ahead of London during BST?
Seoul uses UTC+9 year-round, while London during summer uses UTC+1, creating an 8-hour lead for Korea. The large gap comes from their geographic separation across Eurasia, with South Korea in East Asia and the UK in Western Europe.
This time spread affects real business operations, including software releases, customer support coverage, and supply-chain communication. A request sent from London in the morning may reach Seoul in the late afternoon, leaving only a narrow same-day response window.
Is BST the same as GMT for KST conversion?
No, BST and GMT are not the same, and that difference changes the KST conversion result by one hour. BST is UTC+1, while GMT is UTC+0, so 3 PM KST is 7 AM BST but 6 AM GMT.
This distinction matters most from late March through late October, when the UK is on summer time. If you are booking meetings, flights, webinars, or support coverage, always confirm whether the UK date falls under BST or GMT before finalizing the schedule.