CST to AST Time Converter
Central Standard Time → Arabia Standard Time
CST = UTC-5AST = UTC+3
⚠️ CST is ambiguous — on this page it means Central Standard Time. It also refers to:
⚠️ AST is ambiguous — on this page it means Arabia Standard Time. It also refers to:
CST (Chicago) ↔ AST (Riyadh)
No overlap — one side will join outside working hours
CST (Chicago)
AST (Riyadh)
Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.
Frequently Asked Questions
What is the difference between cst and ast?
Central Standard Time (cst) is UTC-5 and Arabia Standard Time (ast) is UTC+3. The difference between them is 8 hours.
Where is cst used?
Central Standard Time (cst) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago. Note: cst is ambiguous and may refer to other timezones.
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.
How do I convert cst to ast?
Use the interactive converter above. Drag the time slider to any cst time and the ast equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
Popular CST conversions
CST → LondonCST → New YorkCST → TokyoCST → DubaiCST → SydneyCST → ParisCST → BerlinCST → SingaporeCST → Los AngelesCST → Toronto