Convert CET to UTC Central European Time ↔ Coordinated Universal Time Free Online Secure
Type a time in CET and read it in UTC straight away. The offset is −1 h, the arithmetic wraps at midnight, and the answer says which day it lands on.
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Through the day — Convert CET to UTC (Central European Time ↔ Coordinated Universal Time)
| CET | UTC |
|---|---|
| 00:00 | 23:00 |
| 03:00 | 02:00 |
| 06:00 | 05:00 |
| 09:00 | 08:00 |
| 12:00 | 11:00 |
| 15:00 | 14:00 |
| 18:00 | 17:00 |
| 21:00 | 20:00 |
Where these units come from
Until the middle of the nineteenth century every town kept its own noon, set by the sun overhead, and nobody minded that the next town was four minutes behind. Railways ended that: a timetable cannot be written for a hundred local noons. Britain put its railways on Greenwich time in 1847, and in 1884 the International Meridian Conference in Washington chose Greenwich as the prime meridian and sketched the twenty-four-hour scheme we still use. Greenwich Mean Time was the world's reference until 1972, when Coordinated Universal Time replaced it: UTC is kept by atomic clocks and tied back to the turning Earth by leap seconds. The abbreviations on this page name standard time — the winter setting — which is why each one is a fixed number of hours rather than something that drifts through the year.
Where you meet them
A time zone becomes real the moment two people in different places have to agree on one moment: a call between offices, a flight that lands before it took off, a market that opens while you are asleep, a deadline written in somebody else's afternoon. Server logs, train and flight schedules and anything stamped with a time are kept in UTC precisely so that the question can always be settled, no matter whose clock was on the wall.
Questions people ask
What about summer time?
The offsets here are standard-time offsets, the ones a zone keeps in winter. Where summer time is observed, the same places move one hour further on for part of the year and take a different name: Central European Time becomes Central European Summer Time, Eastern Standard Time becomes Eastern Daylight Time. The switching dates are not the same in every country, and the two hemispheres change in opposite months, so for a date inside a summer-time period add an hour to whichever side observes it.
Why isn't every difference a whole number of hours?
Because offsets are decided by governments, not by geometry. India is half an hour off the hour, at UTC+05:30; Nepal is three quarters, at UTC+05:45; the Chatham Islands are at UTC+12:45. Any of these can be changed by law, and several countries have moved their offset within living memory.
Is the answer exact?
Where both units are defined in terms of one another by whole numbers, yes — the page says so above the figure, and the only rounding is in how many digits are shown. Where the ratio has no finite decimal, the page shows twelve significant digits and says the relation is approximate rather than pretending otherwise.
Does anything I type leave my device?
No. The arithmetic runs in your browser; nothing is uploaded and there is no server to upload it to. Load the page once and it keeps working with the network switched off.
When a European time must go into a global record
A conference in Davos opens at 09:00. The Vienna Philharmonic starts its New Year’s concert at 11:15. An avalanche bulletin in the Alps is issued at 17:00. Each time is given on Central European Time, and anyone who files it in a global register, a head-office report or a server log that runs on UTC must convert CET to UTC. Take away one hour: 09:00 CET is 08:00 UTC, 11:15 CET is 10:15 UTC, and 17:00 CET is 16:00 UTC. Only the hour just after midnight crosses the date line when you convert CET to UTC, so keep an eye on it: 00:20 CET is 23:20 UTC on the previous date.
The page below shows how to convert CET to UTC, with the rule, lookup tables, a profile of each zone, an explanation of the extra hour you take off in summer and a run of examples from skiing, music, science and weather. Everything is computed in your browser, and nothing you type is sent to a server.
The subtraction in a few lines
Remove one hour
CET is UTC+1, which means UTC is one hour behind. Subtract one from the CET hour each time you convert CET to UTC. If the result is negative, add 24 and go back a date: 00:40 CET gives −0:20, which is 23:40 UTC the previous day.
Eight pairs to remember each time you convert CET to UTC
00:30 CET is 23:30 UTC the day before. 06:15 CET is 05:15 UTC. 09:00 CET is 08:00 UTC. 12:00 CET is 11:00 UTC. 15:45 CET is 14:45 UTC. 18:00 CET is 17:00 UTC. 21:30 CET is 20:30 UTC. 23:45 CET is 22:45 UTC. Only the first pair falls on the earlier date.
As an offset in a timestamp
A timestamp 2026-01-14T11:00:00+01:00 is the same as 2026-01-14T10:00:00Z. The program that reads it subtracts the offset, so it never needs to know how Europe handles summer time.
CET in institutions and organisations
Who writes CET
Stock exchanges, central banks, European institutions, transport operators and laboratories publish timetables on CET. Many of them also write CET in summer, when the wall clock actually shows CEST. In many documents, “Central European Time” simply means whatever the legal time is on the day.
CET versus CEST
In winter the label is CET at UTC+1. From 29 March to 25 October 2026 it is CEST at UTC+2. The calculator above is based on the winter value, and the summer case is explained further down.
UTC as the target
Why it is requested
Audit registers, security logs, payment systems and the databases of international groups keep their times in UTC because the scale belongs to no country’s calendar. A time written in UTC means the same in Zurich, Singapore and São Paulo.
A rule for developers
Store moments in UTC and convert them for display. A local hour repeats once a year and disappears once a year when clocks change; on 25 October 2026 the hour from 02:00 to 03:00 occurs twice in Berlin. UTC has no such problem. Whenever you convert CET to UTC for a database, keep the date as well as the hour, and write the label UTC next to it.
One hour and the working day
Seven shared hours
A Zurich office open from 09:00 to 17:00 CET works from 08:00 to 16:00 UTC. A London office open from 09:00 to 17:00 GMT works from 09:00 to 17:00 UTC. They overlap from 09:00 to 16:00 UTC, which is 10:00 to 17:00 CET.
Messages
An e-mail sent from Central Europe at 17:00 CET reaches a London head office at 16:00 UTC, while it is still open, and may be answered on the same day. The same message sent at 18:30 CET arrives at 17:30 UTC, after hours. For a head office in New York, 17:00 CET is 11:00 EST.
A long-haul flight
A flight from Zurich to New York that leaves at 11:00 CET, which is 10:00 UTC, and lasts about nine hours lands at 19:00 UTC, which is 14:00 EST. The ticket shows 11:00 and 14:00, so the journey looks like three hours.
Why summer takes off a second hour
When the continent changes its clocks
Central Europe moves its clocks at 01:00 UTC on the last Sunday of March and on the last Sunday of October. For 2026 the dates are 29 March and 25 October. In the months between, the wall clock shows CEST, which is UTC+2.
The consequence for your sum
Nine o’clock on a Berlin clock is 08:00 UTC in January but 07:00 UTC in July. Noon CEST therefore corresponds to 10:00 UTC rather than 11:00. When a document writes “CET” in summer, ask whether the writer meant the wall clock or the winter standard.
What the form does
The calculator above subtracts a single hour. For any date from 29 March to 25 October, subtract two and treat the source as CEST. Either way the UTC figure is exact.
Davos and the January conferences
Programme times
The annual economic forum in the Swiss Alps starts its sessions at about 09:00 CET and runs until late evening. In UTC that is 08:00 to about 20:00. Participants who follow online from New York see the opening at 03:00 EST, which is why most watch the recordings.
Press briefings
A briefing at 12:30 CET is at 11:30 UTC. A journalist in San Francisco, where it is 03:30, will read the summary. A quick convert CET to UTC on the briefing time shows who is awake.
The New Year’s concert from Vienna
One broadcast, many clocks
The Vienna New Year’s concert begins at 11:15 on 1 January, local time. That is 10:15 UTC. Audiences in London watch it at 10:15 GMT, in New York at 05:15 EST and in Tokyo at 19:15. It is transmitted live in dozens of countries.
Planning your morning
Viewers in the Americas wake early for it. If you want to watch from Chicago, you convert CET to UTC to find 04:15 CST. The interval and the encore fall about ninety minutes after the start.
Nobel announcements in Stockholm
Early October
Prize announcements begin around 11:30 local time in the first week of October, when Sweden is on CEST. That is 09:30 UTC. In New York the announcement arrives at 05:30 EDT, which is why science reporters set early alarms.
Writing the time down
Press releases often give the time in CEST. When you file it in a UTC log, subtract two hours, not one. A single slip changes a time stamp from 09:30 to 10:30.
Avalanche and weather bulletins in the Alps
The evening bulletin
Avalanche services issue a bulletin in the afternoon, typically at 17:00 local time. In winter that is 16:00 UTC. Skiers in North America who follow a European trip see the same hour as 11:00 EST. The bulletin is valid until the next morning.
Model runs
Global forecast models start at 00:00 and 12:00 UTC. On a CET clock they are 01:00 and 13:00 in winter. A forecast “for 12 UTC” is a forecast for 13:00 on the Swiss clock. If you convert CET to UTC for the run time, you can tell when the data should appear.
Ski jumping on New Year’s Day
The traditional tournament
The Four Hills ski-jumping tournament holds its events in the early afternoon in Germany and Austria. A competition at 14:00 CET starts at 13:00 UTC. Fans in Britain see it at 13:00 GMT and in North America at 08:00 EST.
Qualification and finals
Qualification takes place the day before, around 16:30 CET, or 15:30 UTC. Whoever follows the results in a spreadsheet needs to convert each stamp to a single clock to determine which event came first.
Month-end reporting from European subsidiaries
The cut-off
Subsidiaries in Germany, France and Italy send their month-end figures to head office by a fixed deadline, often 18:00 CET on the third working day. In UTC that is 17:00. A head office in New York receives them at noon EST.
Consolidation
When systems stamp each entry, a late transaction at 23:50 CET on the last day of the month is stamped 22:50 UTC on the same date. A transaction at 00:10 CET on the first is stamped 23:10 UTC on the last day of the month, which affects which period it belongs to.
Overnight trains across the Alps
Evening departures
Sleeper trains from Vienna, Zurich and Munich to Italy leave in the evening, often at about 21:00 CET, or 20:00 UTC. They arrive early the next morning, at 07:30 CET, or 06:30 UTC. The tickets show the local hours at both ends, which in this case are the same zone.
Connecting with flights
A traveller from the UK who flies to Vienna in time for the 21:00 train should convert the flight’s arrival into CET. If the plane lands at 17:30 GMT, the local time is 18:30, leaving two and a half hours. Do the “convert CET to UTC” calculation before you book.
A day of conversions at a glance
CET into UTC
00:00 CET = 23:00 UTC (previous day). 01:00 CET = 00:00 UTC. 02:00 CET = 01:00 UTC. 03:00 CET = 02:00 UTC. 04:00 CET = 03:00 UTC. 05:00 CET = 04:00 UTC. 06:00 CET = 05:00 UTC. 07:00 CET = 06:00 UTC. 08:00 CET = 07:00 UTC. 09:00 CET = 08:00 UTC. 10:00 CET = 09:00 UTC. 11:00 CET = 10:00 UTC. 12:00 CET = 11:00 UTC. 13:00 CET = 12:00 UTC. 14:00 CET = 13:00 UTC. 15:00 CET = 14:00 UTC. 16:00 CET = 15:00 UTC. 17:00 CET = 16:00 UTC. 18:00 CET = 17:00 UTC. 19:00 CET = 18:00 UTC. 20:00 CET = 19:00 UTC. 21:00 CET = 20:00 UTC. 22:00 CET = 21:00 UTC. 23:00 CET = 22:00 UTC.
Using the table
Find the CET hour you need and read off the UTC hour beside it. The rows come from the arithmetic behind each request to convert CET to UTC. The offset has no minutes in it, so a reading of :45 stays :45 after the conversion. The gap used here is the standard winter one; the period section lists the dates on which it differs.
Half-hour marks
CET to UTC at :30
00:30 CET = 23:30 UTC (previous day). 01:30 CET = 00:30 UTC. 02:30 CET = 01:30 UTC. 03:30 CET = 02:30 UTC. 04:30 CET = 03:30 UTC. 05:30 CET = 04:30 UTC. 06:30 CET = 05:30 UTC. 07:30 CET = 06:30 UTC. 08:30 CET = 07:30 UTC. 09:30 CET = 08:30 UTC. 10:30 CET = 09:30 UTC. 11:30 CET = 10:30 UTC. 12:30 CET = 11:30 UTC. 13:30 CET = 12:30 UTC. 14:30 CET = 13:30 UTC. 15:30 CET = 14:30 UTC. 16:30 CET = 15:30 UTC. 17:30 CET = 16:30 UTC. 18:30 CET = 17:30 UTC. 19:30 CET = 18:30 UTC. 20:30 CET = 19:30 UTC. 21:30 CET = 20:30 UTC. 22:30 CET = 21:30 UTC. 23:30 CET = 22:30 UTC.
Why it helps
Many meetings, broadcasts and scheduled jobs start at half past the hour. This table gives the UTC time for each of them at a glance, which saves you a second calculation. These rows use the standard (winter) gap; on the dates listed in the period section the gap is different.
Conversions with minutes
CET into UTC
01:05 CET = 00:05 UTC. 03:20 CET = 02:20 UTC. 05:50 CET = 04:50 UTC. 07:35 CET = 06:35 UTC. 10:10 CET = 09:10 UTC. 13:25 CET = 12:25 UTC. 16:40 CET = 15:40 UTC. 19:55 CET = 18:55 UTC. 22:15 CET = 21:15 UTC. 23:05 CET = 22:05 UTC.
How to check
Each line shows how a time with minutes is carried across. Minutes are not affected here. A different minute figure in an answer is a sign of a slip. These rows use the standard (winter) gap; on the dates listed in the period section the gap is different.
What part of the day is it?
UTC equivalents for each CET hour
06:00 CET = 05:00 UTC (early morning). 08:00 CET = 07:00 UTC (early morning). 10:00 CET = 09:00 UTC (morning). 12:00 CET = 11:00 UTC (morning). 14:00 CET = 13:00 UTC (around midday). 16:00 CET = 15:00 UTC (afternoon). 18:00 CET = 17:00 UTC (afternoon). 20:00 CET = 19:00 UTC (evening). 22:00 CET = 21:00 UTC (evening).
How to use the list
The words in brackets describe the part of the day in UTC. They help you avoid planning a call or a task for the middle of the night after you convert CET to UTC. Winter-time arithmetic applies to these rows; for the dates in the period section, correct the result accordingly.
Zones near CET, seen from UTC
The ladder
From CET subtract one hour for UTC and GMT in winter, add one for Eastern Europe including Romania, and two for Moscow. From Romanian time subtract two hours to reach UTC.
One moment on four clocks
When it is 14:00 in Berlin, it is 13:00 in London, 15:00 in Bucharest and 16:00 in Moscow. UTC reads 13:00 in winter. A scale like this lets nobody have to convert CET to UTC twice.
Dated examples
A January Thursday
At 14:00 on a Berlin clock on 15 January, UTC reads 13:00. Neither side is on summer time.
The Sunday of the change
On 29 March the clocks move at 01:00 UTC, so by the afternoon 14:00 CEST corresponds to 12:00 UTC.
A July Thursday
At 14:00 CEST on 16 July, UTC reads 12:00. The two-hour gap lasts all summer.
A November Thursday
At 14:00 CET on 12 November, UTC reads 13:00, since Europe went back on 25 October.
Checklist: how to convert CET to UTC
Three questions before the sum
What does the label say?
CET is for winter and CEST for summer. A text that says only “Central European Time” sends you to the calendar: from 29 March to 25 October 2026 it means CEST.
Which country is it?
Romania sits one hour ahead of CET. From a Bucharest clock take off two hours in winter.
Two checks afterwards
What happened to the date?
If the CET reading was between 00:00 and 00:59, the result belongs to the previous date.
Does the anchor fit?
12:00 CET must come out as 11:00 UTC in winter. If not, something is wrong.
Sleeper trains and the first flight of the morning
Early morning connections
Travellers who leave Central Europe on the first flight of the day often board at 06:00 CET, which is 05:00 UTC. A passenger flying to New York arrives about nine hours later, at 14:00 UTC, which is 09:00 EST. If the airline’s app displays UTC, the departure seems to be an hour earlier than the printed boarding pass.
Why the printed time wins
Airports run on local time, and gates close according to it. Keep UTC for your records and rely on the printed hour at the airport. A quick convert CET to UTC before you leave the hotel avoids the mistake of arriving at the wrong hour.
Streaming a festival from the Alps
Evening sets
Alpine music festivals begin their headline sets at about 21:30 CET in winter, or 20:30 UTC. Viewers in London see them at 20:30 GMT, those in New York at 15:30 EST. The same stream is therefore a late-night event on the continent and an afternoon one in North America.
Ticket and travel
Tickets give the local time at the venue. If you plan to arrive by a late train, convert the last departure and compare it with the end of the set so that you do not miss the connection home.
Mistakes when you convert CET to UTC
The wrong direction
A result larger than the starting time means you added. UTC trails the continent.
Summer ignored
In July a “CET” in a document is often CEST. Take off two hours, not one.
Romania mistaken for CET
Romanians are on EET. From their clocks subtract two hours in winter and three in summer.
The late-night date
At 00:20 CET it is still 23:20 on the previous date in UTC. Anyone who fails to move the date is a day out.
Frequently asked questions
By how much do CET and UTC differ?
By one hour, with CET in front.
Which formula applies when I convert CET to UTC?
CET hour minus one, plus 24 if the result is negative.
How much is 12:00 CET in UTC when you convert CET to UTC?
11:00 UTC.
When do I take off two hours?
When the source is on CEST, which in 2026 means 29 March to 25 October.
Does the page store what I type?
No. Everything is processed in your browser.
More time zone converters
Further pages: Convert CET to PST, Convert CET to EET, Convert CST to UTC, Convert GMT to UTC, Convert UTC to CST, Convert CST to CET, Convert GMT to EET, Convert EST to IST, Convert UTC to GMT. The opposite direction lives at Convert UTC to CET.
To summarise, a request to convert CET to UTC means removing one hour in winter and two in summer, with a glance at the date after midnight. All of it happens on your own device, with no account.