UTC
London
Convert UTC to GMT
Coordinated Universal Time to Greenwich Mean Time — London is 1 hour ahead of UTC
Quick Facts
Time Difference
+1 hours
UTC Full Name
Coordinated Universal Time
GMT Full Name
Greenwich Mean Time
UTC to GMT Conversion Table
Related Conversions
About UTC and GMT Time Zones
UTC (Coordinated Universal Time) is UTC+0 and covers cities like Universal reference time. GMT (Greenwich Mean Time) is UTC+0 and covers cities like London, Dublin, Lisbon.
When it's 12:00 PM (noon) in UTC (UTC), it's 1:00 PM in London (GMT). The time difference between UTC and GMT is 1 hour — London is ahead of UTC.
With only a 0-hour difference, UTC and London share nearly a full business day overlap, making scheduling straightforward.
Use our world clock tool to compare UTC and London with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between UTC and GMT?
London (GMT) is 1 hour ahead of UTC (UTC). The offset is +1 hours.
Is GMT ahead or behind UTC?
GMT is 1 hour ahead of UTC. UTC is UTC+0 and GMT is UTC+1.
When it's 12:00 PM in UTC, what time is it in London?
When it's 12:00 PM (noon) in UTC (UTC), it's 1:00 PM in London (GMT).
When it's 5:00 PM in UTC, what time is it in London?
When it's 5:00 PM in UTC (UTC), it's 6:00 PM in London (GMT).