AST to UTC Time Converter
Use this AST to UTC time converter to compare Canada and UTC time instantly. UTC is 4 hours ahead of AST, so 9:00 AM AST becomes 1:00 PM UTC and 5:00 PM AST becomes 9:00 PM UTC. 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 UTC Quick Facts
Use this AST to UTC converter to compare Canada and Universal time, check the 4 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM AST / 1:00 PM UTC.
How to Convert AST to UTC
Converting between Atlantic Standard Time and Coordinated Universal 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 Coordinated Universal Time (UTC +0) time appears immediately. Since UTC is 4 hours ahead of AST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the UTC 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 UTC Converter
When someone in Canada suggests 9:00 AM AST, that's 1:00 PM UTC. 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 UTC 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–UTC 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 UTC so you know exactly when to tune in — with a 4 hours difference, a morning event in Canada falls during work hours in Universal.
AST to UTC Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Atlantic Standard Time to Coordinated Universal Time full day schedule
| Atlantic Standard Time | Coordinated Universal 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)
|
Popular AST Time Converters
Explore more AST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
Convert Other Time Zones to UTC
Find the time difference from any major zone into Coordinated Universal Time. Use these pages when scheduling with Universal from a different region.