Time Difference: London to Seoul

Summary

See the current time in London and Seoul side by side, with the live UTC offset (KST is UTC+9, so Seoul is 9h ahead of GMT or 8h ahead of BST), updated every second.

How it works

1. Your browser reads the current moment from your device clock.
2. It converts that moment to Europe/London time using the IANA timezone database built into modern browsers.
3. The same moment is converted to Asia/Seoul time (KST, UTC+9).
4. The UTC offsets of both cities are compared to calculate the exact hour difference.
5. All three values — London time, Seoul time, and the offset — refresh every second.
6. When London switches between GMT and BST, the displayed offset adjusts automatically from +9 to +8 hours.

Use cases

• Scheduling video calls between London and Seoul offices.
• Checking if a colleague in Seoul is still at their desk.
• Planning UK-South Korea travel and arrival time comparisons.
• Remote teams coordinating daily standups across the UK and South Korea.
• Finding overlapping business hours for London-Seoul meetings.
• Verifying whether London is currently on GMT or BST.
• Journalists checking broadcast times for live South Korea events.
• Students and teachers arranging online lessons between the UK and South Korea.

Frequently Asked Questions