Mumbai
Sydney
Convert IST to AEST
India Standard Time to Australian Eastern Standard Time — Sydney is 4.5 hours ahead of Mumbai
Quick Facts
Time Difference
+4.5 hours
IST Full Name
India Standard Time
AEST Full Name
Australian Eastern Standard Time
IST to AEST Conversion Table
Related Conversions
About IST and AEST Time Zones
IST (India Standard Time) is UTC+5:30 and covers cities like Mumbai, Delhi, Bangalore. AEST (Australian Eastern Standard Time) is UTC+10 and covers cities like Sydney, Melbourne, Brisbane.
When it's 12:00 PM (noon) in Mumbai (IST), it's 4:30 PM in Sydney (AEST). The time difference between IST and AEST is 4.5 hours — Sydney is ahead of Mumbai.
The best meeting window is 1.5:00 PM–5:00 PM IST (9:00 AM–0.5:00 PM AEST).
Daylight Saving Time
AEST observes Daylight Saving Time and becomes AEDT (Australian Eastern Daylight Time) during summer months, shifting clocks forward by 1 hour to UTC+11.
During DST transitions, the time difference between IST and AEST may shift by ±1 hour. Always verify the current offset above for the most accurate conversion.
Use our world clock tool to compare Mumbai and Sydney with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between IST and AEST?
Sydney (AEST) is 4.5 hours ahead of Mumbai (IST). The offset is +4.5 hours.
Is AEST ahead or behind IST?
AEST is 4.5 hours ahead of IST. IST is UTC+5:30 and AEST is UTC+10.
When it's 12:00 PM in Mumbai, what time is it in Sydney?
When it's 12:00 PM (noon) in Mumbai (IST), it's 4:30 PM in Sydney (AEST).
When it's 5:00 PM in Mumbai, what time is it in Sydney?
When it's 5:00 PM in Mumbai (IST), it's 9:30 PM in Sydney (AEST).
Does AEST change for Daylight Saving Time?
Yes. AEST (Australian Eastern Standard Time, UTC+10) becomes AEDT (Australian Eastern Daylight Time, UTC+11) in summer, shifting clocks forward 1 hour.