WorldClock.lol

IST to AEST Time Converter

Convert India Standard Time to Australian Eastern Standard Time

IST
India Standard Time
06:27 AM
UTC+5:30
AEST
Australian Eastern Standard Time
10:57 AM
UTC+10

Convert a Specific Time

:
12:00 PM
=
5:00 PM

IST to AEST Conversion Table

ISTAEST
12:00 AM5:00 AM
3:00 AM8:00 AM
6:00 AM11:00 AM
9:00 AM2:00 PM
12:00 PM5:00 PM
3:00 PM8:00 PM (-1)
6:00 PM11:00 PM (-1)
9:00 PM2:00 AM (+1)

Frequently Asked Questions

What is the time difference between IST and AEST?

India Standard Time (IST) is UTC+5:30 and Australian Eastern Standard Time (AEST) is UTC+10. The exact difference can vary due to Daylight Saving Time changes.

When is 9 AM IST in AEST?

Use our converter above to find the exact time. Enter 9:00 in the IST field to see the corresponding AEST time, accounting for current DST rules.

Does IST observe Daylight Saving Time?

India Standard Time (IST) is based on the Asia/Kolkata timezone. DST observance depends on local regulations. Our converter automatically accounts for current DST rules.

Convert AEST to IST instead

IST to AEST Time Converter

When it is 9:00 AM IST, it is 1.5:00 PM AEST. Australian Eastern Standard Time (AEST, UTC+10) is 4.5 hours ahead of India Standard Time (IST, UTC+5:30). Your working-hours overlap window is 9:00 AM–0.5:00 PM IST (1.5:00 PM–5:00 PM AEST).

IST to AEST Conversion Table

ISTAEST
12:00 AM4.5:00 AM
3:00 AM7.5:00 AM
6:00 AM10.5:00 AM
9:00 AM1.5:00 PM
12:00 PM4.5:00 PM
3:00 PM7.5:00 PM
6:00 PM10.5:00 PM
9:00 PM1.5:00 AM (+1 day)

Major Cities Using IST and AEST

India Standard Time (IST): Mumbai, Delhi, Bangalore, Chennai, Kolkata, Colombo.

Australian Eastern Standard Time (AEST): Sydney, Melbourne, Brisbane (AEST only), Canberra.

How many hours between IST and AEST?

IST is UTC+5:30 and AEST is UTC+10, a difference of 4.5 hours. AEST is ahead of IST. This difference can shift by an hour in either direction during Daylight Saving Time transitions — if one zone observes DST and the other doesn't, the offset narrows or widens for part of the year.

Business Hours Overlap: ISTAEST

Assuming a 9:00 AM – 5:00 PM workday on each side, your working-hours overlap window is 9:00 am–0.5:00 pm ist (1.5:00 pm–5:00 pm aest). To visualize this instantly for any pair of cities, use the visual meeting planner or the timezone overlap finder — both highlight the green overlap window on a live timeline.

Does IST observe Daylight Saving Time?

India Standard Time (IST) is based on the Asia/Kolkata IANA timezone. DST observance depends on the jurisdiction — for example, most of the continental US switches between standard and daylight time, while India, Japan, and most of Southeast Asia do not observe DST at all. WorldClock.lol uses the authoritative IANA timezone database, so every conversion automatically accounts for the correct DST rules on the date you're converting.

When is 9 AM IST in AEST?

When it is 9:00 AM in India Standard Time (IST, UTC+5:30), it is 1.5:00 PM in Australian Eastern Standard Time (AEST). For other times of day, scan the conversion table above or drop into the interactive converter to pick an exact minute. The converter handles both standard and daylight variants correctly.

How to Use This IST to AEST Converter

  1. Type or drag any time in the IST input above — the AEST equivalent updates instantly.
  2. Check the day indicator. When the converted time crosses midnight, the tool shows +1 day or −1 day so you don't book a meeting on the wrong date.
  3. Copy the shareable URL to send the specific conversion to a colleague — the link preserves your exact selection.
  4. Switch directions by swapping the input zones, or open AEST to IST for the reverse.

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