BST to AST Converter

AST is 5h 0m behind BST. When it's 12:00 PM BST, it's 7:00 AM AST.

From

BST · UTC+1

5:09:49AM

British Summer Time

e.g. London, Dublin

To

AST · UTC-4

12:09:49AM

Atlantic Standard Time

e.g. Halifax, Puerto Rico

Open in World ClockAST → BST
9:00 AM BST=4:00 AM AST
12:00 PM BST=7:00 AM AST
5:00 PM BST=12:00 PM AST

Hourly conversion (BST → AST)

BSTAST
12:00 AM7:00 PM(−1 day)
1:00 AM8:00 PM(−1 day)
2:00 AM9:00 PM(−1 day)
3:00 AM10:00 PM(−1 day)
4:00 AM11:00 PM(−1 day)
5:00 AM12:00 AM
6:00 AM1:00 AM
7:00 AM2:00 AM
8:00 AM3:00 AM
9:00 AM4:00 AM
10:00 AM5:00 AM
11:00 AM6:00 AM
12:00 PM7:00 AM
1:00 PM8:00 AM
2:00 PM9:00 AM
3:00 PM10:00 AM
4:00 PM11:00 AM
5:00 PM12:00 PM
6:00 PM1:00 PM
7:00 PM2:00 PM
8:00 PM3:00 PM
9:00 PM4:00 PM
10:00 PM5:00 PM
11:00 PM6:00 PM

Shaded rows are within standard working hours (8am–6pm) on both sides.

BST here is British Summer Time (UTC+1); in winter the UK uses GMT (UTC+0). BST can also mean Bangladesh Standard Time (UTC+6).

More BST conversions

Frequently asked questions

What is the time difference between BST and AST?
AST is 5h 0m behind BST. BST is UTC+1 and AST is UTC-4.
What is 12:00 PM BST in AST?
12:00 PM BST is 7:00 AM AST.
Does BST change for daylight saving time?
BST here is British Summer Time (UTC+1); in winter the UK uses GMT (UTC+0). BST can also mean Bangladesh Standard Time (UTC+6).