What is IST in AEST?
Australian Eastern Time is 4 hours 30 minutes ahead
India Standard Time is on UTC+5:30 and Australian Eastern Time is on UTC+10:00 right now. The gap changes during the year — see below.
- Time in New Delhi
- 8:26 am
- Time in Sydney
- 12:56 pm
- Difference
- +4:30 h
- Next clock change
- October 3, 2026
Convert a time
AEST — Australian Eastern Time
12:30 pm
Wed
When the difference changes
India Standard Time and Australian Eastern Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – October 3, 2026Australian Eastern Time is 4 hours 30 minutes ahead
- October 3, 2026 – April 3, 2027Australian Eastern Time is 5 hours 30 minutes ahead
- April 3, 2027 – October 2, 2027Australian Eastern Time is 4 hours 30 minutes ahead
- October 2, 2027 – onwardsAustralian Eastern Time is 5 hours 30 minutes ahead
Periods shorter than a day are not listed: both zones change at 2am in their own local time, so there are a few hours on each transition date when the gap is briefly something else.
Daylight saving
India Standard Time
India Standard Time stays on IST all year, so its offset from UTC never moves.
Australian Eastern Time
Clocks go forward one hour at 2am local time, becoming AEDT.
IST to AEST conversion table
Every hour of Wednesday, September 23, 2026, converted from India Standard Time to Australian Eastern Time. 4 of the 24 hours fall on a different calendar day in Sydney, which is marked.
- 12:00 am IST
- 4:30 am AEST
- 1:00 am IST
- 5:30 am AEST
- 2:00 am IST
- 6:30 am AEST
- 3:00 am IST
- 7:30 am AEST
- 4:00 am IST
- 8:30 am AEST
- 5:00 am IST
- 9:30 am AEST
- 6:00 am IST
- 10:30 am AEST
- 7:00 am IST
- 11:30 am AEST
- 8:00 am IST
- 12:30 pm AEST
- 9:00 am IST
- 1:30 pm AEST
- 10:00 am IST
- 2:30 pm AEST
- 11:00 am IST
- 3:30 pm AEST
- 12:00 pm IST
- 4:30 pm AEST
- 1:00 pm IST
- 5:30 pm AEST
- 2:00 pm IST
- 6:30 pm AEST
- 3:00 pm IST
- 7:30 pm AEST
- 4:00 pm IST
- 8:30 pm AEST
- 5:00 pm IST
- 9:30 pm AEST
- 6:00 pm IST
- 10:30 pm AEST
- 7:00 pm IST
- 11:30 pm AEST
- 8:00 pm IST
- 12:30 am AEST+1 day
- 9:00 pm IST
- 1:30 am AEST+1 day
- 10:00 pm IST
- 2:30 am AEST+1 day
- 11:00 pm IST
- 3:30 am AEST+1 day
Scheduling between the two
Working hours overlap from 9:00 am to 2:00 pm IST, which is 1:30 pm to 6:30 pm AEST. Anything inside that window falls in the normal working day at both ends.
A note on IST: it can also mean Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). This page means India Standard Time, which is what almost all searches for IST want.
India Standard Time (IST) is used in all of India and Sri Lanka, on a single UTC+5:30 offset with no daylight saving
Australian Eastern Time (AEST) is used in Melbourne, Canberra and Brisbane. Queensland stays on AEST all year while the southern states move to AEDT.