Seoul
Riyadh
Convert KST to AST
Korea Standard Time to Arabia Standard Time — Riyadh is 6 hours behind Seoul
Quick Facts
Time Difference
-6 hours
KST Full Name
Korea Standard Time
AST Full Name
Arabia Standard Time
KST to AST Conversion Table
Related Conversions
About KST and AST Time Zones
KST (Korea Standard Time) is UTC+9 and covers cities like Seoul, Busan, Incheon. AST (Arabia Standard Time) is UTC+3 and covers cities like Riyadh, Jeddah, Baghdad.
When it's 12:00 PM (noon) in Seoul (KST), it's 6:00 AM in Riyadh (AST). The time difference between KST and AST is 6 hours — Riyadh is behind Seoul.
The best meeting window is 9:00 AM–11:00 AM KST (3:00 PM–5:00 PM AST).
Use our world clock tool to compare Seoul and Riyadh with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between KST and AST?
Riyadh (AST) is 6 hours behind Seoul (KST). The offset is -6 hours.
Is AST ahead or behind KST?
AST is 6 hours behind KST. KST is UTC+9 and AST is UTC+3.
When it's 12:00 PM in Seoul, what time is it in Riyadh?
When it's 12:00 PM (noon) in Seoul (KST), it's 6:00 AM in Riyadh (AST).
When it's 5:00 PM in Seoul, what time is it in Riyadh?
When it's 5:00 PM in Seoul (KST), it's 11:00 AM in Riyadh (AST).