Mumbai
Riyadh
Convert IST to AST
India Standard Time to Arabia Standard Time — Riyadh is 2.5 hours behind Mumbai
Quick Facts
Time Difference
-2.5 hours
IST Full Name
India Standard Time
AST Full Name
Arabia Standard Time
IST to AST Conversion Table
Related Conversions
About IST and AST Time Zones
IST (India Standard Time) is UTC+5:30 and covers cities like Mumbai, Delhi, Bangalore. AST (Arabia Standard Time) is UTC+3 and covers cities like Riyadh, Jeddah, Baghdad.
When it's 12:00 PM (noon) in Mumbai (IST), it's 9:30 AM in Riyadh (AST). The time difference between IST and AST is 2.5 hours — Riyadh is behind Mumbai.
With only a 2.5-hour difference, Mumbai and Riyadh share nearly a full business day overlap, making scheduling straightforward.
Use our world clock tool to compare Mumbai and Riyadh with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between IST and AST?
Riyadh (AST) is 2.5 hours behind Mumbai (IST). The offset is -2.5 hours.
Is AST ahead or behind IST?
AST is 2.5 hours behind IST. IST is UTC+5:30 and AST is UTC+3.
When it's 12:00 PM in Mumbai, what time is it in Riyadh?
When it's 12:00 PM (noon) in Mumbai (IST), it's 9:30 AM in Riyadh (AST).
When it's 5:00 PM in Mumbai, what time is it in Riyadh?
When it's 5:00 PM in Mumbai (IST), it's 2:30 PM in Riyadh (AST).