PST to AST Time Converter
Use this PST to AST time converter to compare US West Coast and Canada time instantly. AST is 4 hours ahead of PST, so 9:00 AM PST becomes 1:00 PM AST and 5:00 PM PST becomes 9:00 PM AST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
PST to AST Quick Facts
Use this PST to AST converter to compare US West Coast and Canada time, check the 4 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM PST / 1:00 PM AST.
How to Convert PST to AST
Converting between Pacific Standard Time and Atlantic Standard Time means accounting for a 4 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Pacific Standard Time (UTC -8) that you want to convert. Hit "Now" to load the current PST time instantly, or use "+1h" to step forward and compare.
The equivalent Atlantic Standard Time (UTC -4) time appears immediately. Since AST is 4 hours ahead of PST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the AST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
Why Choose Our PST to AST Converter
When someone in United States suggests 9:00 AM PST, that's 1:00 PM AST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night PST times can land on a different date in AST because of the 4 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the PST–AST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in PST. Convert the event time to AST so you know exactly when to tune in — with a 4 hours difference, a morning event in United States falls during work hours in Canada.
PST to AST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Pacific Standard Time to Atlantic Standard Time full day schedule
| Pacific Standard Time | Atlantic Standard Time |
|---|---|
| 12:00 AM |
4:00 AM
|
| 1:00 AM |
5:00 AM
|
| 2:00 AM |
6:00 AM
|
| 3:00 AM |
7:00 AM
|
| 4:00 AM |
8:00 AM
|
| 5:00 AM |
9:00 AM
|
| 6:00 AM |
10:00 AM
|
| 7:00 AM |
11:00 AM
|
| 8:00 AM |
12:00 PM
|
| 9:00 AM |
1:00 PM
|
| 10:00 AM |
2:00 PM
|
| 11:00 AM |
3:00 PM
|
| 12:00 PM |
4:00 PM
|
| 1:00 PM |
5:00 PM
|
| 2:00 PM |
6:00 PM
|
| 3:00 PM |
7:00 PM
|
| 4:00 PM |
8:00 PM
|
| 5:00 PM |
9:00 PM
|
| 6:00 PM |
10:00 PM
|
| 7:00 PM |
11:00 PM
|
| 8:00 PM |
12:00 AM
(next day)
|
| 9:00 PM |
1:00 AM
(next day)
|
| 10:00 PM |
2:00 AM
(next day)
|
| 11:00 PM |
3:00 AM
(next day)
|
Timezone offsets and DST rules verified against the IANA Time Zone Database. Conversion math and business-hour overlap windows double-checked against real-world scheduling scenarios.
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