MeetingTimePro

IST to AEST converter

India Standard Time to Australian Eastern Time. AEST is 5 h 30 min ahead of IST in January and 4 h 30 min ahead in July.

From

IST · Kolkata GMT+5:30 · UTC+5:30

  • AEST · SydneyUTC+10 · 4 h 30 min ahead
    13:30Mon, Sep 28
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The gap between IST and AEST

2026IST clocksAEST clocksDifference
JanuaryGMT+5:30 UTC+5:30GMT+11 UTC+115 h 30 min ahead
JulyGMT+5:30 UTC+5:30GMT+10 UTC+104 h 30 min ahead

The gap changes on: Sun, April 5, 2026 (4 h 30 min ahead); Sun, October 4, 2026 (5 h 30 min ahead); Sun, April 4, 2027 (4 h 30 min ahead); Sun, October 3, 2027 (5 h 30 min ahead).

Convert the other way: AEST to IST · Plan a meeting across more places

IST to AEST time table

Every hour of the IST day and the matching AEST time, for a mid-January and a mid-July date.

ISTAEST · JanuaryAEST · July
12:00 AM5:30 AM4:30 AM
1:00 AM6:30 AM5:30 AM
2:00 AM7:30 AM6:30 AM
3:00 AM8:30 AM7:30 AM
4:00 AM9:30 AM8:30 AM
5:00 AM10:30 AM9:30 AM
6:00 AM11:30 AM10:30 AM
7:00 AM12:30 PM11:30 AM
8:00 AM1:30 PM12:30 PM
9:00 AM2:30 PM1:30 PM
10:00 AM3:30 PM2:30 PM
11:00 AM4:30 PM3:30 PM
12:00 PM5:30 PM4:30 PM
1:00 PM6:30 PM5:30 PM
2:00 PM7:30 PM6:30 PM
3:00 PM8:30 PM7:30 PM
4:00 PM9:30 PM8:30 PM
5:00 PM10:30 PM9:30 PM
6:00 PM11:30 PM10:30 PM
7:00 PM12:30 AM (+1 day)11:30 PM
8:00 PM1:30 AM (+1 day)12:30 AM (+1 day)
9:00 PM2:30 AM (+1 day)1:30 AM (+1 day)
10:00 PM3:30 AM (+1 day)2:30 AM (+1 day)
11:00 PM4:30 AM (+1 day)3:30 AM (+1 day)

About these two clocks

IST — India Standard Time. Used in all of India — Mumbai, Delhi, Bengaluru. India does not use daylight saving time, so IST is UTC+5:30 all year.

AEST — Australian Eastern Time. Used in Sydney, Melbourne, Canberra (Brisbane stays on AEST all year). AEST is the winter name; from early October to early April Sydney clocks run on AEDT (UTC+11). Southern-hemisphere summer means the switch happens in the opposite months to the US and Europe.

All figures on this page come from the IANA time zone database (the same data your phone and laptop use), evaluated for the date in question. Abbreviations are ambiguous — “IST” also means Irish or Israel Standard Time, and “CST” is China Standard Time in Asia — so this page uses Asia/Kolkata and Australia/Sydney explicitly.

Questions people ask

How many hours ahead or behind is AEST compared with IST?

AEST is 5 h 30 min ahead of IST in January and 4 h 30 min ahead in July. The gap moves because daylight saving time starts and ends on different dates (or not at all) in the two places.

What is 9 am IST in AEST?

On a January date, 9:00 am IST is 2:30 PM AEST. In July it is 1:30 PM. Use the converter above for any other date.

Which cities use IST?

India Standard Time (IST) is used in all of India — Mumbai, Delhi, Bengaluru. India does not use daylight saving time, so IST is UTC+5:30 all year.

Which cities use AEST?

Australian Eastern Time (AEST) is used in Sydney, Melbourne, Canberra (Brisbane stays on AEST all year). AEST is the winter name; from early October to early April Sydney clocks run on AEDT (UTC+11). Southern-hemisphere summer means the switch happens in the opposite months to the US and Europe.

When is a good time for a IST–AEST call?

Look for the hours where both columns in the table fall between about 8 am and 6 pm. If none exist, the meeting planner on our home page shows the least-bad options and lets you share a link that converts for every attendee.

Related conversions

IST to ESTIST to UTCIST to CSTIST to PSTIST to GMTIST to CETEST to AESTPST to AESTIST to JST