CET to GMT Converter
CET to GMT Converter
Convert Central European Time to Greenwich Mean Time instantly, with daylight saving handled for you.
From: Central European Time
CETTo: UK Time
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Time difference: 1 hour
Full day comparison
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Use this free CET to GMT converter to change Central European Time into Greenwich Mean Time in seconds. Enter any time in CET and the tool shows the matching time in GMT, adjusted for daylight saving changes in both regions. It works for Central European cities such as Paris, Berlin, Madrid, Rome, and Amsterdam, and for the UK, including London, Manchester, and Edinburgh.
What Is the Time Difference Between CET and GMT?
CET (UTC+1) is 1 hour ahead of GMT (UTC+0). So 9:00 AM CET is 8:00 AM GMT, and 12:00 PM CET is 11:00 AM GMT. In summer, Central Europe moves to CEST (UTC+2), which is 2 hours ahead of fixed GMT, but the UK also moves to BST (UTC+1), so UK time and Central European time stay exactly 1 hour apart all year.
How to Convert CET to GMT
You can convert Central European Time to Greenwich Mean Time manually in three steps.
Step 1
Start With the CET Time
Take the time in CET. For example, 3:00 PM CET.
Step 2
Subtract 1 Hour
3:00 PM minus 1 hour gives 2:00 PM GMT.
Step 3
Adjust the Date if Needed
If the result falls before midnight, the GMT date is one day behind the CET date. For example, 12:30 AM CET is 11:30 PM the previous day in GMT.
In summer, when Central Europe is on Central European Summer Time (CEST, UTC+2), subtract 2 hours to get fixed GMT instead. If you want the UK clock time, which is on BST in summer, you still subtract just 1 hour.
CET to GMT Conversion Chart
This chart shows how each hour in Central European time converts to GMT, both in winter (CET, subtract 1 hour) and in summer (CEST, subtract 2 hours). Use it as a quick reference for calls, flights, live streams, and deadlines.
| Central Europe Time (12-hour) | Central Europe Time (24-hour) | GMT if CET, winter (12-hour) | GMT if CET, winter (24-hour) | GMT if CEST, summer (12-hour) | GMT if CEST, summer (24-hour) |
|---|---|---|---|---|---|
| 12:00 AM | 00:00 | 11:00 PM (previous day) | 23:00 | 10:00 PM (previous day) | 22:00 |
| 1:00 AM | 01:00 | 12:00 AM | 00:00 | 11:00 PM (previous day) | 23:00 |
| 2:00 AM | 02:00 | 1:00 AM | 01:00 | 12:00 AM | 00:00 |
| 3:00 AM | 03:00 | 2:00 AM | 02:00 | 1:00 AM | 01:00 |
| 4:00 AM | 04:00 | 3:00 AM | 03:00 | 2:00 AM | 02:00 |
| 5:00 AM | 05:00 | 4:00 AM | 04:00 | 3:00 AM | 03:00 |
| 6:00 AM | 06:00 | 5:00 AM | 05:00 | 4:00 AM | 04:00 |
| 7:00 AM | 07:00 | 6:00 AM | 06:00 | 5:00 AM | 05:00 |
| 8:00 AM | 08:00 | 7:00 AM | 07:00 | 6:00 AM | 06:00 |
| 9:00 AM | 09:00 | 8:00 AM | 08:00 | 7:00 AM | 07:00 |
| 10:00 AM | 10:00 | 9:00 AM | 09:00 | 8:00 AM | 08:00 |
| 11:00 AM | 11:00 | 10:00 AM | 10:00 | 9:00 AM | 09:00 |
| 12:00 PM | 12:00 | 11:00 AM | 11:00 | 10:00 AM | 10:00 |
| 1:00 PM | 13:00 | 12:00 PM | 12:00 | 11:00 AM | 11:00 |
| 2:00 PM | 14:00 | 1:00 PM | 13:00 | 12:00 PM | 12:00 |
| 3:00 PM | 15:00 | 2:00 PM | 14:00 | 1:00 PM | 13:00 |
| 4:00 PM | 16:00 | 3:00 PM | 15:00 | 2:00 PM | 14:00 |
| 5:00 PM | 17:00 | 4:00 PM | 16:00 | 3:00 PM | 15:00 |
| 6:00 PM | 18:00 | 5:00 PM | 17:00 | 4:00 PM | 16:00 |
| 7:00 PM | 19:00 | 6:00 PM | 18:00 | 5:00 PM | 17:00 |
| 8:00 PM | 20:00 | 7:00 PM | 19:00 | 6:00 PM | 18:00 |
| 9:00 PM | 21:00 | 8:00 PM | 20:00 | 7:00 PM | 19:00 |
| 10:00 PM | 22:00 | 9:00 PM | 21:00 | 8:00 PM | 20:00 |
| 11:00 PM | 23:00 | 10:00 PM | 22:00 | 9:00 PM | 21:00 |
CET vs CEST and GMT vs BST: Why the Time Difference Stays the Same
Both most of Europe and the UK move their clocks for daylight saving time. Central Europe switches between Central European Time (CET, UTC+1) and Central European Summer Time (CEST, UTC+2). The UK switches between Greenwich Mean Time (GMT, UTC+0) and British Summer Time (BST, UTC+1).
Unlike the UK and the US, whose dates differ, the UK and the European Union change their clocks on the same day: the last Sunday of March and the last Sunday of October, both at 01:00 UTC. That is why UK time and Central European time stay 1 hour apart throughout the year. The only exception is if you compare CEST with fixed GMT (UTC+0) in summer, where the gap is 2 hours. Here is how it works in 2026.
| Period (2026) | Central Europe Time | UK Time | Central Europe vs UK | Central Europe vs Fixed GMT (UTC+0) |
|---|---|---|---|---|
| Jan 1 – Mar 28 | CET (UTC+1) | GMT (UTC+0) | 1 hour | 1 hour |
| Mar 29 – Oct 24 | CEST (UTC+2) | BST (UTC+1) | 1 hour | 2 hours |
| Oct 25 – Dec 31 | CET (UTC+1) | GMT (UTC+0) | 1 hour | 1 hour |
Tip: If a colleague or client in the UK says “GMT” in summer, check whether they mean fixed UTC+0 or the current UK clock time (BST). It is the most common cause of one-hour scheduling mistakes.
Best Time for a Meeting Between Central Europe and the UK
With only a 1-hour gap, the working days of Central Europe and the UK overlap for most of the day. Central Europe starts its office day an hour earlier on the clock, and the UK finishes an hour later.
| Central Europe (CET) | UK Time (GMT) | Suitability |
|---|---|---|
| 9:00 AM – 10:00 AM | 8:00 AM – 9:00 AM | Fair (early for the UK) |
| 10:00 AM – 1:00 PM | 9:00 AM – 12:00 PM | Best overlap (morning) |
| 1:00 PM – 2:00 PM | 12:00 PM – 1:00 PM | Lunch break in both regions |
| 2:00 PM – 5:00 PM | 1:00 PM – 4:00 PM | Good overlap (afternoon) |
| 5:00 PM – 6:00 PM | 4:00 PM – 5:00 PM | Fair (late for Central Europe) |
| 6:00 PM onward | 5:00 PM onward | Outside office hours |
A standard 9:00 AM to 5:00 PM workday in Central Europe runs from 8:00 AM to 4:00 PM in the UK.
What Is CET (Central European Time)?
Central European Time is the standard time zone for much of Europe, 1 hour ahead of Coordinated Universal Time (UTC+1). It is used in countries such as Germany, France, Spain, Italy, the Netherlands, Belgium, Switzerland, Austria, Poland, Sweden, Norway, Denmark, the Czech Republic, and Hungary. In summer the region switches to Central European Summer Time (CEST, UTC+2). In the IANA time zone database, examples include Europe/Paris, Europe/Berlin, and Europe/Madrid.
What Is GMT (Greenwich Mean Time)?
Greenwich Mean Time is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+0 for everyday purposes. The UK uses GMT in winter and switches to British Summer Time (BST, UTC+1) in summer. Some countries, such as Iceland and Ghana, use GMT all year. In the IANA time zone database, UK time is listed as Europe/London.
Frequently Asked Questions
How many hours is GMT behind CET?
GMT (UTC+0) is 1 hour behind CET (UTC+1). In summer, GMT is 2 hours behind CEST (UTC+2), but UK clocks move to BST, so UK time and Central European time stay 1 hour apart all year.
What is 9 AM CET in GMT?
9:00 AM CET is 8:00 AM GMT.
What is 12 PM CET in GMT?
12:00 PM CET is 11:00 AM GMT.
Is CET ahead of or behind GMT?
CET is ahead of GMT. To convert CET to GMT, subtract 1 hour.
Is the time difference between CET and GMT always 1 hour?
Between Central European time and UK time, yes, because both regions change their clocks on the same dates. Between CEST and fixed GMT (UTC+0) in summer, the difference is 2 hours.
How do I convert CEST to GMT?
Subtract 2 hours from CEST to get fixed GMT (UTC+0). If you want the UK clock time in summer, which is BST (UTC+1), subtract 1 hour.
What is the difference between CET and CEST?
CET (UTC+1) is Central European Time, used in winter. CEST (UTC+2) is Central European Summer Time, used from the last Sunday of March to the last Sunday of October.
Which countries use CET?
Countries in CET include Germany, France, Spain, Italy, the Netherlands, Belgium, Switzerland, Austria, Poland, Sweden, Norway, Denmark, the Czech Republic, and Hungary.
How do I convert CET to GMT quickly?
Subtract 1 hour from the CET time, or use the converter on this page and the result is shown instantly.