AST to KST Time Converter
Arabia Standard Time → Korea Standard Time
AST = UTC+3KST = UTC+9
⚠️ AST is ambiguous — on this page it means Arabia Standard Time. It also refers to:
AST (Riyadh) ↔ KST (Seoul)
2h of business hours overlap daily (09:00–17:00)
AST (Riyadh)
KST (Seoul)
Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.
Frequently Asked Questions
What is the difference between ast and kst?
Arabia Standard Time (ast) is UTC+3 and Korea Standard Time (kst) is UTC+9. The difference between them is 6 hours.
Where is ast used?
Arabia Standard Time (ast) is used in Saudi Arabia and surrounding regions. The IANA timezone identifier is Asia/Riyadh. Note: ast is ambiguous and may refer to other timezones.
Where is kst used?
Korea Standard Time (kst) is used in South Korea and surrounding regions. The IANA timezone identifier is Asia/Seoul.
How do I convert ast to kst?
Use the interactive converter above. Drag the time slider to any ast time and the kst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
Popular AST conversions
AST → LondonAST → New YorkAST → TokyoAST → DubaiAST → SydneyAST → ParisAST → BerlinAST → SingaporeAST → Los AngelesAST → Toronto