Convert Greenwich Mean Time to Coordinated Universal Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between GMT and UTC:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| GMT Time | UTC Time | Context |
|---|---|---|
| 12:00 AM | 12:00 AM | Midnight GMT |
| 01:00 AM | 01:00 AM | Late Night |
| 02:00 AM | 02:00 AM | Late Night |
| 03:00 AM | 03:00 AM | Late Night |
| 04:00 AM | 04:00 AM | Late Night |
| 05:00 AM | 05:00 AM | Late Night |
| 06:00 AM | 06:00 AM | Early Morning GMT |
| 07:00 AM | 07:00 AM | Night Time |
| 08:00 AM | 08:00 AM | Night Time |
| 09:00 AM | 09:00 AM | Work Starts GMT |
| 10:00 AM | 10:00 AM | Night Time |
| 11:00 AM | 11:00 AM | Night Time |
London
Europe/London
UTC
UTC
UTC (Coordinated Universal Time) is 0 hours ahead of GMT (Greenwich Mean Time). This means when it's 12:00 PM in London (GMT), it's 12:00 PM in UTC (UTC).
The best time to call from GMT to UTC is during overlapping business hours. For GMT callers, schedule between 9:00 AM - 12:00 PM GMT to ensure both parties are within standard business hours.
The time difference may change during daylight saving transitions if one region observes DST while the other doesn't. Greenwich Mean Time (UTC+0 (GMT) / UTC+1 (BST)) and Coordinated Universal Time (UTC+0) may have different DST schedules.
GMT includes cities like London. UTC includes cities like UTC. Both time zones cover important business and cultural centers.
In 2025, DST in North America starts on March 9 at 2:00 AM and ends on November 2 at 2:00 AM. Other regions may have different DST schedules or not observe DST at all.