AST to GMT Time Converter
Arabia Standard Time → Greenwich Mean Time
AST = UTC+3GMT = UTC+1
⚠️ AST is ambiguous — on this page it means Arabia Standard Time. It also refers to:
AST (Riyadh) ↔ GMT (London)
6h of business hours overlap daily (09:00–17:00)
AST (Riyadh)
GMT (London)
Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.
Frequently Asked Questions
What is the difference between ast and gmt?
Arabia Standard Time (ast) is UTC+3 and Greenwich Mean Time (gmt) is UTC+1. The difference between them is 2 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 gmt used?
Greenwich Mean Time (gmt) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London.
How do I convert ast to gmt?
Use the interactive converter above. Drag the time slider to any ast time and the gmt 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