London
Riyadh
Convert GMT to AST
Greenwich Mean Time to Arabia Standard Time — Riyadh is 2 hours ahead of London
Quick Facts
Time Difference
+2 hours
GMT Full Name
Greenwich Mean Time
AST Full Name
Arabia Standard Time
GMT to AST Conversion Table
Related Conversions
About GMT and AST Time Zones
GMT (Greenwich Mean Time) is UTC+0 and covers cities like London, Dublin, Lisbon. AST (Arabia Standard Time) is UTC+3 and covers cities like Riyadh, Jeddah, Baghdad.
When it's 12:00 PM (noon) in London (GMT), it's 2:00 PM in Riyadh (AST). The time difference between GMT and AST is 2 hours — Riyadh is ahead of London.
With only a 3-hour difference, London and Riyadh share nearly a full business day overlap, making scheduling straightforward.
Use our world clock tool to compare London and Riyadh with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between GMT and AST?
Riyadh (AST) is 2 hours ahead of London (GMT). The offset is +2 hours.
Is AST ahead or behind GMT?
AST is 2 hours ahead of GMT. GMT is UTC+1 and AST is UTC+3.
When it's 12:00 PM in London, what time is it in Riyadh?
When it's 12:00 PM (noon) in London (GMT), it's 2:00 PM in Riyadh (AST).
When it's 5:00 PM in London, what time is it in Riyadh?
When it's 5:00 PM in London (GMT), it's 7:00 PM in Riyadh (AST).