CST to GMT Converter
GMT is 6 hours ahead of CST
CST to GMT Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in GMT
| CST | GMT |
|---|---|
| 12:00 AM | 6:00 AM |
| 1:00 AM | 7:00 AM |
| 2:00 AM | 8:00 AM |
| 3:00 AM | 9:00 AM |
| 4:00 AM | 10:00 AM |
| 5:00 AM | 11:00 AM |
| 6:00 AM | 12:00 PM |
| 7:00 AM | 1:00 PM |
| 8:00 AM | 2:00 PM |
| 9:00 AM | 3:00 PM |
| 10:00 AM | 4:00 PM |
| 11:00 AM | 5:00 PM |
| 12:00 PM | 6:00 PM |
| 1:00 PM | 7:00 PM |
| 2:00 PM | 8:00 PM |
| 3:00 PM | 9:00 PM |
| 4:00 PM | 10:00 PM |
| 5:00 PM | 11:00 PM |
| 6:00 PM | 12:00 AM +1d |
| 7:00 PM | 1:00 AM +1d |
| 8:00 PM | 2:00 AM +1d |
| 9:00 PM | 3:00 AM +1d |
| 10:00 PM | 4:00 AM +1d |
| 11:00 PM | 5:00 AM +1d |
Converting Central Standard Time to Greenwich Mean Time
Central Standard Time (CST) and Greenwich Mean Time (GMT) are separated by a 6 hours time difference. GMT is 6 hours ahead of CST. CST is UTC-6, used in United States, Canada, Mexico, while GMT is UTC+0, used in United Kingdom, Ireland, Portugal.
When converting from CST to GMT, the key reference points to remember are: 9:00 AM CST equals 3:00 PM GMT, 12:00 PM noon CST equals 6:00 PM GMT, and 5:00 PM CST equals 11:00 PM GMT. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across CST and GMT
For professionals scheduling meetings between CST and GMT, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 6 hours difference, the window of overlap may be limited. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
CST observes Daylight Saving Time, switching to CDT (UTC-5) during summer months. GMT observes DST, switching to BST (UTC+1). During DST transitions, the time difference between these zones may temporarily change by 1 hour. Always verify the current offset during spring and fall transition periods.