London
Istanbul
Convert GMT to TRT
Greenwich Mean Time to Turkey Time — Istanbul is 2 hours ahead of London
Quick Facts
Time Difference
+2 hours
GMT Full Name
Greenwich Mean Time
TRT Full Name
Turkey Time
GMT to TRT Conversion Table
Related Conversions
About GMT and TRT Time Zones
GMT (Greenwich Mean Time) is UTC+0 and covers cities like London, Dublin, Lisbon. TRT (Turkey Time) is UTC+3 and covers cities like Istanbul, Ankara, Izmir.
When it's 12:00 PM (noon) in London (GMT), it's 2:00 PM in Istanbul (TRT). The time difference between GMT and TRT is 2 hours — Istanbul is ahead of London.
With only a 3-hour difference, London and Istanbul share nearly a full business day overlap, making scheduling straightforward.
Use our world clock tool to compare London and Istanbul with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between GMT and TRT?
Istanbul (TRT) is 2 hours ahead of London (GMT). The offset is +2 hours.
Is TRT ahead or behind GMT?
TRT is 2 hours ahead of GMT. GMT is UTC+1 and TRT is UTC+3.
When it's 12:00 PM in London, what time is it in Istanbul?
When it's 12:00 PM (noon) in London (GMT), it's 2:00 PM in Istanbul (TRT).
When it's 5:00 PM in London, what time is it in Istanbul?
When it's 5:00 PM in London (GMT), it's 7:00 PM in Istanbul (TRT).