AST to PST Time Converter
Use this AST to PST time converter to compare Canada and US West Coast time instantly. PST is 4 hours behind AST, so 9:00 AM AST becomes 5:00 AM PST and 5:00 PM AST becomes 1:00 PM PST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
AST to PST Quick Facts
Use this AST to PST converter to compare Canada and US West Coast time, check the 4 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 1:00 PM AST / 9:00 AM PST.
How to Convert AST to PST
Converting between Atlantic Standard Time and Pacific 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 Atlantic Standard Time (UTC -4) that you want to convert. Hit "Now" to load the current AST time instantly, or use "+1h" to step forward and compare.
The equivalent Pacific Standard Time (UTC -8) time appears immediately. Since PST is 4 hours behind of AST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the PST 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 AST to PST Converter
When someone in Canada suggests 1:00 PM AST, that's 9:00 AM PST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night AST times can land on a different date in PST 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 AST–PST 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 AST. Convert the event time to PST so you know exactly when to tune in — with a 4 hours difference, a morning event in Canada falls during work hours in United States.
AST to PST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Atlantic Standard Time to Pacific Standard Time full day schedule
| Atlantic Standard Time | Pacific Standard Time |
|---|---|
| 12:00 AM |
8:00 PM
(previous day)
|
| 1:00 AM |
9:00 PM
(previous day)
|
| 2:00 AM |
10:00 PM
(previous day)
|
| 3:00 AM |
11:00 PM
(previous day)
|
| 4:00 AM |
12:00 AM
|
| 5:00 AM |
1:00 AM
|
| 6:00 AM |
2:00 AM
|
| 7:00 AM |
3:00 AM
|
| 8:00 AM |
4:00 AM
|
| 9:00 AM |
5:00 AM
|
| 10:00 AM |
6:00 AM
|
| 11:00 AM |
7:00 AM
|
| 12:00 PM |
8:00 AM
|
| 1:00 PM |
9:00 AM
|
| 2:00 PM |
10:00 AM
|
| 3:00 PM |
11:00 AM
|
| 4:00 PM |
12:00 PM
|
| 5:00 PM |
1:00 PM
|
| 6:00 PM |
2:00 PM
|
| 7:00 PM |
3:00 PM
|
| 8:00 PM |
4:00 PM
|
| 9:00 PM |
5:00 PM
|
| 10:00 PM |
6:00 PM
|
| 11:00 PM |
7:00 PM
|
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Convert Other Time Zones to PST
Find the time difference from any major zone into Pacific Standard Time. Use these pages when scheduling with United States from a different region.