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IST to AEST Time Converter

Use this IST to AEST time converter to compare India and Australia time instantly. AEST is 4 hours and 30 minutes ahead of IST, so 9:00 AM IST becomes 1:30 PM AEST and 5:00 PM IST becomes 9:30 PM AEST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.

IST India Standard Time
...
AEST Australian Eastern Standard Time
...
Select a time to convert

IST to AEST Quick Facts

Use this IST to AEST converter to compare India and Australia time, check the 4 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM IST / 1:30 PM AEST.

Time Difference
Australian Eastern Standard Time is 4 hours and 30 minutes ahead of India Standard Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Best overlap starts around 9:00 AM IST and 1:30 PM AEST.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

How to Convert IST to AEST

Converting between India Standard Time and Australian Eastern Standard Time means accounting for a 4 hours and 30 minutes gap — here's how to do it in under 10 seconds with no sign-up.

Enter Your IST Time

Pick the date and time in India Standard Time (UTC +5:30) that you want to convert. Hit "Now" to load the current IST time instantly, or use "+1h" to step forward and compare.

Read the AEST Result

The equivalent Australian Eastern Standard Time (UTC +10) time appears immediately. Since AEST is 4 hours and 30 minutes ahead of IST, most daytime conversions stay on the same calendar day.

Copy or Fine-Tune

Click "Copy Time" to grab the AEST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.

Why Choose Our IST to AEST Converter

Align IST–AEST Meetings Instantly

When someone in India suggests 9:00 AM IST, that's 1:30 PM AEST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.

Spot Date-Line Shifts at a Glance

Late-night IST times can land on a different date in AEST because of the 4 hours and 30 minutes offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.

Handles DST Transitions Automatically

The half-hour offset between IST (UTC +5:30) and AEST (UTC +10) already makes mental math tricky — add Daylight Saving Time and the gap can shift further. This converter uses live UTC offsets, so you're always accurate.

Never Miss a IST-Timed Event

Product launches, sports matches, and webinars are often announced in IST. Convert the event time to AEST so you know exactly when to tune in — with a 4 hours and 30 minutes difference, a morning event in India falls during work hours in Australia.

IST to AEST Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

India Standard Time to Australian Eastern Standard Time full day schedule

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
(next day)
9:00 PM
IST
→
1:30 AM
AEST
(next day)
10:00 PM
IST
→
2:30 AM
AEST
(next day)
11:00 PM
IST
→
3:30 AM
AEST
(next day)
The two zones in context

IST vs AEST — cities and working rhythm

IST — India Standard Time
Primary cities: Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata

Indian business hours run 10 AM – 7 PM IST typically; IT / BPO shifts commonly extend to cover US and UK working hours, so 3:30 PM – 12:30 AM IST (US overlap) and 12:30 PM – 9 PM IST (UK overlap) are the two second shifts you see most often. Weekend is Saturday-Sunday for most private-sector employers.

AEST — Australian Eastern Standard Time
Primary cities: Sydney (winter), Melbourne (winter), Brisbane (year-round)

Australia's east-coast winter offset (April to October), UTC+10. Brisbane stays on AEST year-round since Queensland has no DST. Big gap with Europe (8-10 h ahead) and North America (14-17 h ahead) — often faster to just email.

Time gap: AEST is 4.5 hours ahead of IST (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).

IST to AEST FAQ

Quick answers about daylight saving time, date changes, business-hour overlap, and the most common scheduling questions between India Standard Time and Australian Eastern Standard Time.

What is the time difference between IST and AEST?

AEST is 4 hours 30 minutes ahead of IST. IST is UTC +5:30 and AEST is UTC +10:00 relative to UTC. AEST observes daylight saving but IST does not, so the gap shifts by an hour twice a year. In AEST winter the difference is 4 hours 30 minutes; in summer it changes by one hour.

When can IST and AEST have business-hour overlap?

Aim for 09:00–12:00 IST, which is 13:00–16:00 AEST. Both sides stay inside standard business hours.

Does IST or AEST observe daylight saving time?

AEST observes daylight saving but IST does not, so the gap shifts by an hour twice a year. In AEST winter the difference is 4 hours 30 minutes; in summer it changes by one hour.

How do I quickly convert IST to AEST?

To convert IST to AEST, add 4 hours 30 minutes to the IST time. Example: if it's 10:00 AM IST, it's 14:00 AEST that day. The live converter at the top of this page handles DST automatically.

Why convert AEST to IST?

Australian universities and companies with Indian engineering centers coordinate across this 4.5-hour gap (5.5 during Sydney summer). The Indian Ocean corridor — Mumbai-Sydney-Singapore — is increasingly important for Asia-Pacific business.

What's the overlap window?

AEST 1:00-5:00 PM = IST 8:30 AM-12:30 PM (winter). India starts morning, Australia finishes afternoon. During AEDT (summer) the gap widens to 5.5 hours; shift the meeting an hour earlier on the Indian side.

Does the AEST-IST gap shift?

Yes, by one hour. India stays on IST year-round; Australia's Eastern states (NSW, VIC, TAS, ACT) move between AEST (UTC+10) and AEDT (UTC+11). QLD, WA, NT stay on standard time year-round.

Popular IST Time Converters

Explore more IST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to AEST

Find the time difference from any major zone into Australian Eastern Standard Time. Use these pages when scheduling with Australia from a different region.

🇦🇺 Swap direction — AEST to IST Converter