--:--:--
—
Paris · Berlin · Rome
Compare working hours worldwide in the meeting planner international.
Difference
AST vs CET
UTC → UTC
--:--:--
—
San Juan · Barbados · Halifax (winter)
CET to AST converter
CET to AST Converter
Convert CET (Paris) to AST (San Juan) now. Live clocks, the current time difference, and a simple meeting window — free.
Europe/Paris
—
CET → AST
To · Atlantic Standard Time
—
America/Puerto_Rico
Interactive diagram
Watch CET convert into AST
Drag the Central Europe hour. Watch the Atlantic clock change.
Central Europe
9:00 AM CET
—
AST ← CET
Atlantic
—
Full-day chart
CET to AST hourly conversion chart
Full-day table. Tap a row to copy. Labels follow daylight saving.
| Central Europe | Atlantic | UTC offsets |
|---|
Meeting times
Best CET to AST meeting window
Find hours that work on both sides. Then save the slot to your calendar.
Follow along
Step-by-step CET to AST conversion
Four short steps to convert any CET time to AST.
Choose CET time
Select any hour in Central European Time. Smart mode uses Europe/Paris.
CET to AST conversion guide
CET to AST conversion guide
This CET to AST converter shows Atlantic Standard Time (UTC−4) for any Central European Time (UTC+1) time. Use it to schedule between Paris and San Juan. Choose Smart DST for live city clocks. Choose Fixed mode when you only want the CET and AST labels.
Central Europe
CET
UTC+1
Paris · Berlin · Rome
CET vs AST—
Atlantic
AST
UTC−4
San Juan · Barbados · Halifax (winter)
What is CET to AST conversion?
CET to AST conversion turns a CET clock into the matching AST time. Use it for calls, travel, and teams in Paris and San Juan.
CET to AST time difference
AST is 5 hours behind CET. Subtract 5 hours from the CET time to get AST. The live clocks at the top show the current CET to AST gap.
CET vs AST
CET is UTC+1. AST is UTC−4. They are different names. If a region uses daylight saving, check the live labels.
CET to AST now / current time
Need cet to ast right now? Read the live clocks, or tap Use current time for an instant CET → AST result.
CET to AST time difference
Season / context — tap to explore
See how daylight saving can change this pair.
Central Europe—
—CET → AST
Atlantic—
Quick answers
Central Europe
Central European Time (CET)
UTC+1
Central European Time (CET) is UTC+1. Smart DST uses the city clock Europe/Paris so daylight saving stays correct for Paris · Berlin · Rome.
- Cities: Paris · Berlin · Rome
- City clock: Europe/Paris
- Fixed CET: UTC+1
- On this page it pairs with AST (UTC−4)
Atlantic
Atlantic Standard Time (AST)
UTC−4
Atlantic Standard Time (AST) is UTC−4. Smart DST uses America/Puerto_Rico for cities such as San Juan · Barbados · Halifax (winter).
- Cities: San Juan · Barbados · Halifax (winter)
- City clock: America/Puerto_Rico
- Fixed AST: UTC−4
- From CET: AST is 5 hours behind CET
CET to AST FAQ
Common CET to AST questions
What is the CET to AST time difference?
AST is 5 hours behind CET. Fixed labels: CET = UTC+1, AST = UTC−4. Subtract 5 hours from the CET time to get AST.
How do I convert CET to AST quickly?
Subtract 5 hours from the CET time to get AST. Example: 3:00 AM CET → 10:00 PM AST. Or use the live CET to AST converter above.
Is AST the same as CET?
No. CET is UTC+1 (Paris · Berlin · Rome). AST is UTC−4 (San Juan · Barbados · Halifax (winter)).
What is a good CET to AST meeting time?
AST is behind. Try 10:00 AM–3:00 PM CET. That is about 5:00 AM–10:00 AM AST. Use the meeting planner on this page to export an ICS or Google Calendar invite.
What cities use CET and AST?
CET is common in Paris · Berlin · Rome. AST is common in San Juan · Barbados · Halifax (winter). Smart DST uses Europe/Paris and America/Puerto_Rico.