IST to AEST Time Converter

Convert India Standard Time (IST) to Australian Eastern Standard Time (AEST). Both time zones are shown live below; current offset between them is 4h 30m ahead.

Mumbai · India Standard Time
02:25:27
Monday, May 11, 2026
GMT+5:30 · UTC+05:30
Sydney · Australian Eastern Standard Time
06:55:27
Monday, May 11, 2026
GMT+10 · UTC+10:00

Convert a specific time

From: IST (Mumbai)
To: AEST (Sydney)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
AEST (Australian Eastern Standard Time)
Observes DST
Yes
In DST right now
No
Next spring forward
2026-10-04
Offset shift
UTC+10:00 → UTC+11:00

Heads up: AEST observes DST while IST does not. The 4.5-hour difference shown above will shift by one hour when AEST starts or ends DST.

When can IST and AEST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
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21
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23
IST
AEST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Mumbai (IST). Each row shows the local working-hours state in that zone for the same moment in time.
4 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–12:00 IST (13:30–16:30 AEST).

Hour-by-hour IST to AEST conversion table

IST time (Mumbai)AEST time (Sydney)Status
00:00 Mon04:30 MonOff-hours both sides
01:00 Mon05:30 MonOff-hours both sides
02:00 Mon06:30 MonOff-hours both sides
03:00 Mon07:30 MonOff-hours both sides
04:00 Mon08:30 MonOff-hours both sides
05:00 Mon09:30 MonAEST working
06:00 Mon10:30 MonAEST working
07:00 Mon11:30 MonAEST working
08:00 Mon12:30 MonAEST working
09:00 Mon13:30 MonBoth at work
10:00 Mon14:30 MonBoth at work
11:00 Mon15:30 MonBoth at work
12:00 Mon16:30 MonBoth at work
13:00 Mon17:30 MonIST working
14:00 Mon18:30 MonIST working
15:00 Mon19:30 MonIST working
16:00 Mon20:30 MonIST working
17:00 Mon21:30 MonOff-hours both sides
18:00 Mon22:30 MonOff-hours both sides
19:00 Mon23:30 MonOff-hours both sides
20:00 Mon00:30 TueOff-hours both sides
21:00 Mon01:30 TueOff-hours both sides
22:00 Mon02:30 TueOff-hours both sides
23:00 Mon03:30 TueOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

India Standard Time (IST)
IANA identifier
Asia/Kolkata
Current UTC offset
UTC+05:30
Current abbreviation
GMT+5:30
Major cities in this zone
MumbaiNew DelhiBangaloreChennaiKolkata
Australian Eastern Standard Time (AEST)
IANA identifier
Australia/Sydney
Current UTC offset
UTC+10:00
Current abbreviation
GMT+10
Major cities in this zone
SydneyMelbourneCanberra

Sun today in Mumbai and Sydney

Mumbai
Sunrise
06:06
Sunset
19:05
Solar noon
12:36
Daylight
12h 58m
Sydney
Sunrise
06:38
Sunset
17:07
Solar noon
11:52
Daylight
10h 29m

Related converters

AEST to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to AESTPST to AESTGMT to AESTUTC to AESTCET to AEST
Looking for local time? See time in Mumbai or time in Sydney.

Frequently asked questions

What is the time difference between IST and AEST right now?+
AEST (Australian Eastern Standard Time) is currently 4h 30m ahead IST (India Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does IST or AEST observe daylight saving time?+
IST: does not observe daylight saving time. AEST: observes daylight saving time.
When is the best time to schedule a meeting between IST and AEST?+
The strongest overlap is 09:00–12:00 IST (13:30–16:30 AEST), giving 4 hours when both sides are within standard 9am-5pm working hours.
What time is it in Sydney when it is 12:00 noon in Mumbai?+
When it is 12:00 Mon in Mumbai (IST), it is 16:30 Mon in Sydney (AEST).
Which IANA time zone identifiers are used for IST and AEST?+
IST maps to "Asia/Kolkata" in the IANA database. AEST maps to "Australia/Sydney". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Sydney?+
Whether Mumbai (IST) is ahead of or behind Sydney (AEST) depends on the current UTC offsets. Right now AEST is 4h 30m ahead IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and AEST?+
IST is UTC+05:30 (GMT+5:30) and AEST is UTC+10:00 (GMT+10). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both IST and AEST?+
Yes. There are 4 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–12:00 IST.