Convert Central Standard Time to Greenwich Mean Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between CST and GMT:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| CST Time | GMT Time | Context |
|---|---|---|
| 12:00 AM | 06:00 AM | Midnight CST |
| 01:00 AM | 07:00 AM | Late Night |
| 02:00 AM | 08:00 AM | Late Night |
| 03:00 AM | 09:00 AM | Late Night |
| 04:00 AM | 10:00 AM | Late Night |
| 05:00 AM | 11:00 AM | Late Night |
| 06:00 AM | 12:00 PM | Early Morning CST |
| 07:00 AM | 01:00 PM | Night Time |
| 08:00 AM | 02:00 PM | Night Time |
| 09:00 AM | 03:00 PM | Work Starts CST |
| 10:00 AM | 04:00 PM | Night Time |
| 11:00 AM | 05:00 PM | Night Time |
Chicago
America/Chicago
London
Europe/London
GMT (Greenwich Mean Time) is 6 hours ahead of CST (Central Standard Time). This means when it's 12:00 PM in Chicago (CST), it's 6:00 PM in London (GMT).
The best time to call from CST to GMT is during overlapping business hours. For CST callers, schedule between 9:00 AM - 12:00 PM CST 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. Central Standard Time (UTC-6 (CST) / UTC-5 (CDT)) and Greenwich Mean Time (UTC+0 (GMT) / UTC+1 (BST)) may have different DST schedules.
CST includes cities like Chicago. GMT includes cities like London. 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.