Time Difference: London to Istanbul

Summary

See the current time in London and Istanbul side by side, with the live UTC offset (TRT is UTC+3, no DST), 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 Europe/Istanbul time (TRT, UTC+3).
4. The UTC offsets of both cities are compared to calculate the exact hour difference.
5. All three values — London time, Istanbul time, and the offset — refresh every second.
6. When London switches between GMT and BST, the displayed offset adjusts automatically from +3 to +2 hours.

Use cases

• Scheduling video calls between London and Istanbul offices.
• Checking if a colleague in Istanbul is still at their desk.
• Planning UK-Turkey travel and arrival time comparisons.
• Remote teams coordinating daily standups across the UK and Turkey.
• Finding overlapping business hours for London-Istanbul meetings.
• Verifying whether London is currently on GMT or BST.
• Investors monitoring London and Istanbul financial market hours.
• Students and teachers arranging online lessons between the UK and Turkey.

Frequently Asked Questions