IST to AEST Time Converter
Australian Eastern Standard Time (AEST) is currently 4 hours 30 minutes ahead of India Standard Time (IST). IST is UTC+5:30 and AEST is UTC+10. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 12:30 PM in IST, which is 1:30 PM to 5:00 PM in AEST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: IST to AEST
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
IST and AEST are fixed offsets, so the difference between them never changes.
This page covers India Standard Time, UTC+5:30, which has no daylight saving. IST can also refer to Irish Standard Time (UTC+1) or Israel Standard Time (UTC+2).
AEST is UTC+10. Sydney and Melbourne switch to AEDT (UTC+11) from October to April, while Brisbane stays on AEST year round.
Frequently Asked Questions
How many hours ahead is AEST compared to IST?
AEST is currently 4 hours 30 minutes ahead of IST. IST and AEST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in IST in AEST?
9:00 AM in IST is 1:30 PM in AEST.
What is the best time for a call between IST and AEST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 12:30 PM in IST, which is 1:30 PM to 5:00 PM in AEST.