IST to AEST Time Converter - Live World Clock
Convert time between India Standard Time (IST) and Australian Eastern Standard Time (AEST). See current time with live clocks.
India (IST)
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10:57:44 PM
Thursday, August 20, 2026
Australia (AEST)
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03:27:44 AM
Friday, August 21, 2026
Current Time Difference
IST is -4.5 hours behind AEST
What is IST (India Standard Time)?
India Standard Time (IST) is the time zone observed throughout India, with a time offset of UTC+5:30. India does not observe Daylight Saving Time.
Countries and Regions Using IST
Primary Country:
- India - The entire country follows IST
Also Used By:
- Sri Lanka
Key Facts about IST:
- ✓ Over 1.4 billion people use IST
- ✓ Major tech and financial hub
- ✓ No DST observed
- ✓ Single timezone across the country
- ✓ Major Cities: Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad
- ✓ UTC Offset: +5:30
What is AEST (Australian Eastern Standard Time)?
Australian Eastern Standard Time (AEST) used in eastern Australia, UTC+10:00.
Countries and Regions Using AEST
Primary Country:
- Australia
Key Facts about AEST:
- ✓ Most populous Australian timezone
- ✓ Major business centers
- ✓ DST observed October-April
- ✓ Major Cities: Sydney, Melbourne, Brisbane, Canberra
- ✓ UTC Offset: +10:00 (+11:00 during AEDT)
IST to AEST Time Difference
Standard Time Difference:
IST is -4.5 hours behind
Common Use Cases:
- • Business meetings between India and Australia
- • International collaboration across timezones
- • Scheduling calls and conferences
Frequently Asked Questions
Which countries are in IST time zone?
India is the primary country using IST (+5:30). Other countries include: Sri Lanka.
Which countries are in AEST time zone?
Australia is the primary country using AEST (+10:00).
How many hours is IST ahead of AEST?
IST is -4.5 hours behind AEST.
Does India observe Daylight Saving Time?
No, India does not observe Daylight Saving Time. IST remains +5:30 throughout the year.