KST to AST Converter

AST is 13h 0m behind KST. When it's 12:00 PM KST, it's 11:00 PM (−1 day) AST.

From

KST · UTC+9

1:09:54PM

Korea Standard Time

e.g. Seoul

To

AST · UTC-4

12:09:54AM

Atlantic Standard Time

e.g. Halifax, Puerto Rico

Open in World ClockAST → KST
9:00 AM KST=8:00 PM(−1 day) AST
12:00 PM KST=11:00 PM(−1 day) AST
5:00 PM KST=4:00 AM AST

Hourly conversion (KST → AST)

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

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

More KST conversions

Frequently asked questions

What is the time difference between KST and AST?
AST is 13h 0m behind KST. KST is UTC+9 and AST is UTC-4.
What is 12:00 PM KST in AST?
12:00 PM KST is 11:00 PM (−1 day) AST.
Does KST change for daylight saving time?
KST is a fixed offset of UTC+9 and does not itself change for daylight saving time.