Compare KST vs BST
See the current time difference between KST and BST, understand DST effects, and find the best hours to schedule meetings.
How to Find the Time Difference Between KST and BST
Open the KST vs BST converter: Go to https://www.xconvert.com/time-converter/kst-vs-bst to load a comparison grid with KST (Korea Standard Time) and BST (British Summer Time) already shown. This page is useful when you need to schedule a call between Seoul and the UK during summer, such as coordinating with a Korean electronics supplier and a London-based sales or finance team.
Add comparison cities relevant to your work: Click “+ Add City” and add cities such as London, Seoul, and New York if you are managing a multinational project involving UK clients, Korean manufacturing, and US stakeholders. This is especially practical for industries like semiconductors, gaming, e-commerce, and international logistics, where teams in South Korea and the UK often need a shared handoff window.
Drag to select a meeting window on the grid: Click “Select” if needed, then drag across the KST row to highlight a time range in purple, such as 4:00 PM to 6:00 PM KST. Because KST is 8 hours ahead of BST, that same slot appears as 8:00 AM to 10:00 AM BST, which is often one of the best overlap periods for a Seoul-London business call without pushing either side too far outside normal office hours.
Export and share the selected time: After selecting the range, 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 Google Calendar or ICS invite to a Seoul partner so both teams see the meeting automatically in local time, reducing mistakes during summer scheduling.
KST vs BST Offset Explained
KST (Korea Standard Time) is UTC+9 all year and does not observe daylight saving time. South Korea uses one national time zone for the entire country, including Seoul, Busan, Incheon, and Daegu, and the offset stays fixed in every month of the year.
BST (British Summer Time) is UTC+1 and is the daylight saving time used in the United Kingdom during the warmer part of the year. BST begins when clocks move forward by one hour on the last Sunday in March and ends on the last Sunday in October, when the UK returns to GMT (Greenwich Mean Time, UTC+0).
The exact difference between KST and BST is 8 hours, with KST ahead of BST. That means when it is 9:00 AM in London during BST, it is 5:00 PM in Seoul; when it is 6:00 PM in Seoul, it is 10:00 AM in the UK on the same calendar day.
This seasonal detail matters because the UK does not use BST all year. During the UK winter, when the country switches back to GMT, KST becomes 9 hours ahead of the UK instead of 8, so a meeting that worked at 5:00 PM KST / 9:00 AM BST in July would shift to 5:00 PM KST / 8:00 AM GMT in December unless you adjust it.
For 2025, the UK is on BST from 30 March 2025 to 26 October 2025. During that period, Seoul and UK summer scheduling is generally easier for morning UK calls and late-afternoon Korea calls, which is useful for tech support windows, cross-border procurement, media coordination, and financial reporting between Korean and British teams.
Because South Korea has a population of roughly 51 million and the UK about 68 million, this time pairing is common in sectors with strong bilateral links, including automotive, consumer electronics, entertainment, fintech, and higher education. Direct and connecting air travel between Seoul Incheon (ICN) and London Heathrow (LHR) also makes this comparison relevant for travelers confirming departure times, arrival dates, and airport transfer schedules across the 8-hour summer gap.
Frequently Asked Questions
What is the exact time difference between KST and BST?
KST is 8 hours ahead of BST. If it is 12:00 noon in London during British Summer Time, it is 8:00 PM in South Korea the same day, which makes UK mornings line up best with late Korean afternoons.
Is KST always 8 hours ahead of the UK?
No, KST is only 8 hours ahead when the UK is on BST, which runs from the last Sunday in March to the last Sunday in October. Outside that period, the UK uses GMT (UTC+0), so KST is 9 hours ahead during the British winter.
Does South Korea use daylight saving time?
No, South Korea does not currently observe daylight saving time, so KST remains UTC+9 year-round. This makes Seoul scheduling more predictable than UK scheduling, because only the British side changes seasonally.
What is a good meeting time between Seoul and London?
A practical overlap is usually 4:00 PM to 6:00 PM KST, which corresponds to 8:00 AM to 10:00 AM BST. This window works well for sales calls, supplier updates, and project standups, since it stays within normal office hours in London and near the end of the business day in Seoul.
Why does my KST to BST meeting shift in late March or late October?
Your meeting shifts because the UK changes between GMT and BST, while South Korea stays on UTC+9 all year. When the UK moves clocks forward in March, the difference narrows from 9 hours to 8 hours; when clocks go back in October, it widens again from 8 hours to 9 hours.
How do I convert 9 AM KST to BST?
To convert 9:00 AM KST to BST, subtract 8 hours, which gives 1:00 AM BST on the same day. This shows why early Korean morning meetings are usually inconvenient for UK participants and why late afternoon in Seoul is a more realistic collaboration window.
Is BST the same as GMT for time conversion?
No, BST and GMT are not the same. BST is UTC+1 and used in the UK during daylight saving time, while GMT is UTC+0 and used during the winter months, so choosing the wrong one can make your meeting invite off by one hour.