GMT to CET Converter
Understanding GMT and CET Time Zones
Greenwich Mean Time (GMT)
Greenwich Mean Time is observed in undefined and uses the offset UTC+0. Major cities in this time zone include London, Dublin, Lisbon. This time zone covers parts of Europe and/or Africa, home to major financial and cultural centers.
Central European Time (CET)
Central European Time operates at UTC+1, covering undefined. Key cities include Paris, Berlin, Rome, Madrid. The 1-hour forward offset from GMT means that when professionals in London start their workday at 9:00 AM, it is already 10:00 AM in Paris.
GMT is also commonly referred to as London time, UK time, British time, England time. CET is also known as Europe time, European time, Paris time, Berlin time, EU time. So if you are searching for London time to Europe time, this is the same conversion as GMT to CET.
Complete GMT to CET Conversion Table
The table below shows every two-hour increment converted from Greenwich Mean Time to Central European Time. Business hours (9 AM – 5 PM) are highlighted for easy scheduling reference.
| GMT (Greenwich Mean Time) | CET (Central European Time) |
|---|---|
| 12:00 AM (00:00) | 1:00 AM (01:00) |
| 2:00 AM (02:00) | 3:00 AM (03:00) |
| 4:00 AM (04:00) | 5:00 AM (05:00) |
| 6:00 AM (06:00) | 7:00 AM (07:00) |
| 8:00 AM (08:00) | 9:00 AM (09:00) |
| 10:00 AM (10:00) | 11:00 AM (11:00) |
| 12:00 PM (12:00) | 1:00 PM (13:00) |
| 2:00 PM (14:00) | 3:00 PM (15:00) |
| 4:00 PM (16:00) | 5:00 PM (17:00) |
| 6:00 PM (18:00) | 7:00 PM (19:00) |
| 8:00 PM (20:00) | 9:00 PM (21:00) |
| 10:00 PM (22:00) | 11:00 PM (23:00) |
Times shown in 12-hour and 24-hour format. Last updated 2026-03-09.
Scheduling Between GMT and CET
For business scheduling, the optimal overlap window between GMT and CET falls roughly between 9:00 AM and 4:00 PM GMT. This ensures both London and Paris teams are within standard working hours.
The small 1-hour gap between GMT and CET means that most of the business day overlaps, making real-time collaboration straightforward. Morning meetings in GMT align well with late morning schedules in CET.
Travel Between London and Paris
Travelers flying from London to Paris should adjust their sleep schedule 1 day before departure at a rate of one hour per day. For this time difference, gradual adjustment reduces jet lag dramatically.
Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 1-hour shift between GMT and CET, plan for a quick adjustment of 1–2 days.
Daylight Saving Time Considerations
During standard time months (November through March in the US), this offset is fixed. However, if either zone observes daylight saving time, the difference may temporarily shift by one hour during transition weeks in spring and autumn.
For the GMT to CET conversion specifically: GMT (UTC+0) and CET (UTC+1) both observe DST. When both zones transition on different dates, the offset temporarily shifts by one hour for a few weeks. Always verify during March–April and October–November.
Related Time Zone Conversions
References & Resources
Frequently Asked Questions
GMT (Greenwich Mean Time) is 1 hour behind CET (Central European Time). GMT is UTC+0 and CET is UTC+1.
When it is 12:00 PM (noon) in GMT, it is 1:00 PM in CET.
The best overlap for business hours is approximately 10:00 AM to 6:00 PM CET, which corresponds to 9:00 AM to 5:00 PM in GMT.
During standard time months (November through March in the US), this offset is fixed. However, if either zone observes daylight saving time, the difference may temporarily shift by one hour during transition weeks in spring and autumn.