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Los Angeles · Seattle · Vancouver
Plan global invites faster using the executive meeting planner.
Difference
AST vs PST
UTC → UTC
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San Juan · Barbados · Halifax (winter)
PST to AST converter
PST to AST Converter
Convert PST (Los Angeles) to AST (San Juan) now. Live clocks, the current time difference, and a simple meeting window — free.
America/Los_Angeles
—
PST → AST
To · Atlantic Standard Time
—
America/Puerto_Rico
Interactive diagram
Watch PST convert into AST
Drag the Pacific hour. Watch the Atlantic clock change.
Pacific
9:00 AM PST
—
AST ← PST
Atlantic
—
Full-day chart
PST to AST hourly conversion chart
Full-day table. Tap a row to copy. Labels follow daylight saving.
| Pacific | Atlantic | UTC offsets |
|---|
Meeting times
Best PST to AST meeting window
Find hours that work on both sides. Then save the slot to your calendar.
Follow along
Step-by-step PST to AST conversion
Four short steps to convert any PST time to AST.
Choose PST time
Select any hour in Pacific Standard Time. Smart mode uses America/Los_Angeles.
PST to AST conversion guide
PST to AST conversion guide
This PST to AST converter shows Atlantic Standard Time (UTC−4) for any Pacific Standard Time (UTC−8) time. Use it to schedule between Los Angeles and San Juan. Choose Smart DST for live city clocks. Choose Fixed mode when you only want the PST and AST labels.
Pacific
PST
UTC−8
Los Angeles · Seattle · Vancouver
PST vs AST—
Atlantic
AST
UTC−4
San Juan · Barbados · Halifax (winter)
What is PST to AST conversion?
PST to AST conversion turns a PST clock into the matching AST time. Use it for calls, travel, and teams in Los Angeles and San Juan.
PST to AST time difference
AST is 4 hours ahead of PST. Add 4 hours to the PST time to get AST. The live clocks at the top show the current PST to AST gap.
PST vs AST
PST is UTC−8. AST is UTC−4. They are different names. If a region uses daylight saving, check the live labels.
PST to AST now / current time
Need pst to ast right now? Read the live clocks, or tap Use current time for an instant PST → AST result.
PST to AST time difference
Season / context — tap to explore
See how daylight saving can change this pair.
Pacific—
—PST → AST
Atlantic—
Quick answers
Pacific
Pacific Standard Time (PST)
UTC−8
Pacific Standard Time (PST) is UTC−8. Smart DST uses the city clock America/Los_Angeles so daylight saving stays correct for Los Angeles · Seattle · Vancouver.
- Cities: Los Angeles · Seattle · Vancouver
- City clock: America/Los_Angeles
- Fixed PST: UTC−8
- 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 PST: AST is 4 hours ahead of PST
PST to AST FAQ
Common PST to AST questions
What is the PST to AST time difference?
AST is 4 hours ahead of PST. Fixed labels: PST = UTC−8, AST = UTC−4. Add 4 hours to the PST time to get AST.
How do I convert PST to AST quickly?
Add 4 hours to the PST time to get AST. Example: 3:00 AM PST → 7:00 AM AST. Or use the live PST to AST converter above.
Is AST the same as PST?
No. PST is UTC−8 (Los Angeles · Seattle · Vancouver). AST is UTC−4 (San Juan · Barbados · Halifax (winter)).
What is a good PST to AST meeting time?
AST is ahead. Try 7:00–11:00 AM PST. That is about 11:00 AM–3:00 PM AST. Use the meeting planner on this page to export an ICS or Google Calendar invite.
What cities use PST and AST?
PST is common in Los Angeles · Seattle · Vancouver. AST is common in San Juan · Barbados · Halifax (winter). Smart DST uses America/Los_Angeles and America/Puerto_Rico.