Skip to content

IST to AEST Time Converter

Type a time in IST to see it in AEST, with daylight saving handled for the date you pick. Every hour of the day is in the table below, and the meeting planner shows when both working days overlap.

v2026.10.10

In Sydney

2:30 pmAEDT

9:00 am IST on Wed 14 Jan 2026 is 2:30 pm AEDT the same day. Sydney is 5 h 30 min ahead of India.

India (IST)0 · 6 · 12 · 18
Sydney (AEDT)
9 am–5 pmBoth at work: 2.5 h
Date there
Wednesday 14 January 2026
Offsets
IST UTC+5:30 · AEDT UTC+11
Date used
Example day: Wednesday 14 January 2026
How this works: Method, 3 sources,

How this works

Method

Here IST means India Standard Time, UTC+5:30 all year; AEST means Australian Eastern Time, AEST (UTC+10) in its winter and AEDT (UTC+11) in its summer, as kept in Sydney. So AEDT is 5 h 30 min ahead of IST, and AEST is 4 h 30 min ahead. Two 9-to-5 working days overlap by 2 h 30 min in January and 3 h 30 min in July. Full method

Sources

Changes

  • 15 more conversion pages (IST to CST, BST to IST, SGT, GST, JST, MST and more); each conversion page shows all 24 hours with working hours shaded, and its best meeting times.
  • The pickers find about a thousand more cities, states and countries (Seattle, Bangalore, Texas), and each conversion page names the next clock change on either side.
  • The converter opens on the time now, live, with a Now choice beside the time, and the main converter starts from your own time zone.
  • First published, with a world clock, pages for the time in 31 places and 15 common conversions such as PST to IST.

Every change on What’s new

How we make toolsReport a mistake

How to convert IST to AEST

Here IST means India Standard Time, UTC+5:30 all year; AEST means Australian Eastern Time, AEST (UTC+10) in its winter and AEDT (UTC+11) in its summer, as kept in Sydney. So AEDT is 5 h 30 min ahead of IST, and AEST is 4 h 30 min ahead. Two 9-to-5 working days overlap by 2 h 30 min in January and 3 h 30 min in July.

From India, Australian Eastern Time is the clock of Sydney, Melbourne, Canberra and Brisbane, and IST to AEST is searched by students heading to Australian universities, by teams serving Australian banks and telcos, and by families with relatives there. Australia is ahead, so the Indian morning overlaps the Australian afternoon: a 9:30 am start in India is already 2:00 pm or 3:00 pm in Sydney.

Daylight saving runs the other way round from the northern hemisphere. Sydney and Melbourne move to AEDT (UTC+11) from the first Sunday in October to the first Sunday in April, so in the Indian winter they are 5 h 30 min ahead; in the Indian summer, on AEST (UTC+10), 4 h 30 min. Brisbane stays on AEST all year. Perth is on a different clock altogether, Australian Western Time, 2 h 30 min ahead of India.

Rule of thumb: Add 4½ hours to Indian time while Sydney is on AEST (April to October) and 5½ while it is on AEDT: 10:00 am IST is 2:30 pm AEST or 3:30 pm AEDT.

AEDT = IST +5:30 · AEST = IST +4:30

  • Western Australia last moved its clocks for summer in a trial that ran from December 2006 to March 2009; Perth has stayed on UTC+8 all year since. Source: IANA tz database, file australasia.

Meeting planner: best times for IST and AEST

The easiest meetings fall where both working days overlap, shaded dark on the bar for each season. The lighter shading is still between 7 am and 9 pm on both clocks, so one side starts early or stays late.

January: IST and AEDT

  • Both at work: 9:00 am to 11:30 am IST is 2:30 pm to 5:00 pm AEDT (2 h 30 min).
  • Early or late for one side: 7:00 am to 9:00 am IST is 12:30 pm to 2:30 pm AEDT (2 h); 11:30 am to 3:30 pm IST is 5:00 pm to 9:00 pm AEDT (4 h).

July: IST and AEST

  • Both at work: 9:00 am to 12:30 pm IST is 1:30 pm to 5:00 pm AEST (3 h 30 min).
  • Early or late for one side: 7:00 am to 9:00 am IST is 11:30 am to 1:30 pm AEST (2 h); 12:30 pm to 4:30 pm IST is 5:00 pm to 9:00 pm AEST (4 h).

Both between 9 am and 5 pmBoth between 7 am and 9 pm

IST to AEST time conversion table

Every hour of the IST day and the time in AEST: the January column holds while the clocks are on IST and AEDT, the July column while they are on IST and AEST. The dates they switch are under the table.

Every hour of the IST day and the time in AEST: the January column holds while the clocks are on IST and AEDT, the July column while they are on IST and AEST. The dates they switch are under the table.
IST timeAEDT in JanuaryAEST in 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 (next day)11:30 pm
8:00 pm1:30 am (next day)12:30 am (next day)
9:00 pm2:30 am (next day)1:30 am (next day)
10:00 pm3:30 am (next day)2:30 am (next day)
11:00 pm4:30 am (next day)3:30 am (next day)

Shaded: 9 am to 5 pm on that clock. Where a row is shaded on both sides, both are at work.

When the IST–AEST difference changes next

DateWhat happensThen
Sun 4 Apr 2027Sydney falls back (AEST)AEST is 4 h 30 min ahead of IST
Sun 3 Oct 2027Sydney springs forward (AEDT)AEDT is 5 h 30 min ahead of IST

Frequently Asked Questions

What is 9 am IST in AEST?

In January, 9:00 am IST is 2:30 pm AEDT. In July, 9:00 am IST is 1:30 pm AEST.

What time is 4 am IST in AEST?

4:00 am in India is 8:30 am AEST in Sydney from April to October, and 9:30 am AEDT from October to April. That makes the Indian early morning the start of the Australian working day.

Is Perth on AEST?

No. Perth uses Australian Western Standard Time, UTC+8, with no daylight saving, so it is 2 h 30 min ahead of India all year, two or three hours behind Sydney.